INTRODUCTION A) Name and Location of Plant : Name of plant: FIL INDUSTRIES PVT LIMITED Location: Rangreth District: Srinagar State: Jammu and Kashmir Province: Kashmir B) Divisions of the plant : a) Consumer division: Apple juice concentrate manufacturing. b) Food and Beverage division: Ready to serve drinks of juices in tetra pack & pet bottles and packaged drinking water. c) Ware house division: Controlled atmosphere storage, Processes & packing of fruits/vegetables. C) Fact Sheet : Year of establishment: 1997 Legal status of firm: Limited liability / cooperation Nature of business: Manufacturer Major market: NZ /Australia, East & North Europe Established in 1997 FIL Industries Ltd. is a company that works closely with the Indian farmers to protect and preserve their produce. Over a decade FIL Industries has evolved into a food and beverage company other than being a renowned producer of pesticides with worldwide presence. FIL industries is Page | 1
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INTRODUCTION A) Name and Location of Plant : Name of plant: FIL INDUSTRIES PVT LIMITED
Location: Rangreth
District: Srinagar
State: Jammu and Kashmir
Province: Kashmir
B) Divisions of the plant :a) Consumer division: Apple juice concentrate manufacturing.
b) Food and Beverage division: Ready to serve drinks of juices in tetra pack & pet bottles
and packaged drinking water.
c) Ware house division: Controlled atmosphere storage, Processes & packing of
fruits/vegetables.
C) Fact Sheet : Year of establishment: 1997
Legal status of firm: Limited liability / cooperation
Nature of business: Manufacturer
Major market: NZ /Australia, East & North Europe
Established in 1997 FIL Industries Ltd. is a company that works closely with the
Indian farmers to protect and preserve their produce. Over a decade FIL Industries has evolved
into a food and beverage company other than being a renowned producer of pesticides with
worldwide presence. FIL industries is a place of apple juice conc. Manufacturing, RTS drinks in
tetra packs & pet bottles, packaged drinking water, controlled atmosphere storage of fruits &
vegetables, etc. FIL Industries is committed to provide the best protection for bumper crop,
achieving international standards in food processing setting up infrastructure for post harvest
management and the provision of quality and high yielding seeds for the finest crops.
Apple (Malus domestica) is a principal crop of temperate regions of the world. In India it is
cultivated in Himachal Pradesh, Jammu & Kashmir and hills of U.P. Apple are primarily used
for table purposes and processing. The objective of processing of apple is to produce juice in
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single strength or concentrated form. An insignificant proportion is utilized for the production of
preserves like Jam, Jelly and candy.
Approximate percentage composition of Apple: Fruit AppleWater 84.1 %Carbohydrates 14.9%Proteins 0.3 %Ash 0.3 %Fat 0.4 %
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CONSUMER DIVISION
In the consumer division, FIL Industries Pvt. Limited is primarily engaged in the manufacture
and export of Apple Juice Concentrate. The Apple Juice Concentrate is sold under the brand
name of KOHINOOR. Apple juice concentrate is manufactured by pressing of apples. The
resulting juice may be further treated by enzymatic and centrifugal clarification to remove the
starch and pectin, which holds fine particulate in suspension, and then pasteurized for packaging,
in glass, metal or aseptic processing system containers, or further treated by dehydration
processes to a concentrate. A concentrate is a form of substance which has had the majority of its
base component in the case of a liquid; the solvent removed. Typically this will be the removal
of water from a solution or suspension such as the removal of water from fruit juice. One benefit
of producing a concentrate is that of a reduction in weight and volume for transportation as the
concentrate can be reconstituted at the time of usage by the addition of the solvent. The
concentrate juice may be further treated by enzymatic and centrifugal clarification to remove the
starch and pectin, which holds fine particulate in suspension, and then pasteurized for packaging
in glass, metal or aseptic processing system containers, or further treated by dehydration process
to a concentrate.
The consumer division of FIL Industries Limited was set-up over a decade ago with the foray
and development of one of the largest fruit juice concentrate units in Asia, with an annual
capacity of 7500 MT. The manufacturing process of juice concentrate is a complex and costly
process and requires a lot of machinery and equipments. The FIL Industries limited explores the
potential source of raw material in the state combined together with the state-of-art-technology
from Australia, Germany, Italy, and United Kingdom installed in FIL’s manufacturing unit, that
has allowed FIL Industries to achieve best international standard and great customer satisfaction.
In the consumer division, FIL industries manufacture Apple Juice Concentrate and Apple
Aroma, and are leading suppliers of the two to dairy producers, the confectionary and bakery
industries, renowned baby food manufacturers, health and functional products, as well as in the
pharmaceutical and cosmetic industry.
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Manufacturing Facility:
The consumer division unit is a hallmark of technological excellence, commissioned with state
of the art advanced machinery procured from the best sources worldwide. The salient features
include:
A Bellmer double wrinkle fruit press from Germany, with a crushing capacity of 20 MT
per hour.
India’s first Ultrafiltration plant from PCI membrane of United Kingdom.
A separate aroma recovery unit from SCHMIDT Bretten of Germany that extracts the
aroma of each fruit in order to restore the original flavor to the end product.
A 4 stage SCHMIDT Bretten Sigmaster plate evaporator that ensures the desired degree
of juice concentration.
Fully equipped testing laboratory including HPLC equipment for testing of patulin.
Apple juice concentrate is a common beverage for both adults and children. Vitamin C is
sometimes added by fortification, because content is variable and much is lost in processing.
Other vitamin concentrations are low, but apple juice does contain some minerals, including
Boron, which may promote healthy bones. Apple juice has a significant concentration of
polyphenols that may protect from disease associated with ageing due to the antioxidant effects
which help to reduce the likeliness of cancer development. Research suggests that apple juice
increases the acetylcholine in the brain, resulting in increased memory.
Table: Specifications for the Apple Juice ConcentrateBrix 710BDensity 1.325Acidity (%) 1.0-3.5Pectin NegativeStarch NegativeFlavor FruityTurbidity ClearTotal patulin Less than 50 ppbYeast & Mold Less than 50 ppbShelf life 18 months at 10 0C Crop time Aug-SepPackaging HDPE food grade drums
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Manufacturing Process of Apple Juice Concentrate
Apple Reception The apples are received from the orchards and weighed on a weigh bridge before
unloading on an unloading ramp. After unloading the apples are pre-washed in the water
channels, through which water flows, pumped by high pressure hydrostat pump. In these water
channels the foreign materials (Stones, iron fillings, sand, etc) and fully rotten apples settle
down. The prewashed fruit is then final washed and lifted by the screw elevator which has water
nozzle for the purpose. The screw elevator puts the fruit onto the sorting belt; the sorting belt
has three tracks (one big in the middle and two small side tracks). The Apples are manually
sorted; sorting is done to separate the rotten apples which could become a potential source of
patulin and other mycotoxins in the finished product. The sorted apples are then carried by an
inclined belt conveyer to the Fruit mill, while as the spoiled apples are disposed off to the bins.
Fruit MillIn the fruit mill crushing of the apples is done to form a mash for the juice extraction in the
subsequent operations. Enzyme dosing is done in the fruit mill to get maximum extraction of the
juice. The enzymes added in the fruit mill are:
- Amylase
- Pectinase
The enzymes are added at the dosage of 30-40 grams/ton of apples.
The enzymes are added to aid in the rupturing of cells for the better extraction and yield of the
juice and thus to increase productivity. The crushing capacity is 2.5 MT/hour.
Mash HeaterA mash heater is a tube in tube arrangement of pipes in
which the mash is passed through the inner tube and the
hot water is allowed to pass through the tube surrounding
the inner tube. The mash is heated to the temperature of
40-45 0C. Heating is done for the purpose to activate the
enzymes and soften the mash to enhance pressing. Figure. Mash HeaterMash Holding Tank
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There are two mash holding tanks in which heated mash is pumped into, to provide sufficient
time for the enzymes to act on the substrate. The holding time allows the enzymes to act properly
on the mash which results in the increased yield by the rupturing of juice cells. The holding time
of 30 minutes is provided to the mash at 40 0C. To ensure the continuous flow of the prod uct.
There are two holding tanks installed in the FIL Industries Limited.
Primary PressAfter the sufficient holding time is provided to the mash in the mash holding tanks, the mash is
pumped to the primary press. There is a BELT PRESS (BELMER PRESS) installed in the FIL
industries. This primary press has two belts (lower and upper) between which the fruit (mash) is
trapped. The belts pass over the roller and crush the mash as it passes. The belts are porous. It
yields about 80% of the juice from the mash.
The Belmer press extracts juice in the four stages:
Pre-extraction (1st stage): The fresh mash is fed across a horizontal belt. A large part of the
juice sums up as a result of gravity. The WPW is equipped with an adjustable pressing belt. This
is the step for maximum yield of juice.
Wedge section (2nd stage): After the preliminary extraction the two circulating belts form a
vertical wedge shaped section. The extraction is affected by slowly increasing pressure resulting
from the belt movement, the height of the section and the adjustable setting angle of the wedge.
Low pressure press section (3rd stage): The mash is fed around the first perforated rolls by the
two belts. Here the extraction is affected directly to the outside and additionally to the inside.
High pressure press section (4th stage): It is the S-shaped section. The mash cake between the
belts is extracted. The resulting kneading and shearing action free the enclosed liquid to obtain
the very high yields. The relatively short press time of 3.5 minutes ensure minimal oxidation.
The high pressure press section of the WPX is equipped with the additional press rolls and press
nip.
Collection of juice: The juice extracted from the mash in the primary press runs off at different
positions and is collected in the trough below the perforated roll from where it is guided farther
via one outlet.
In the primary press two products are formed
- Juice
- Pomace
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The juice from the primary press is passed through sieves into the balance tank and the
remaining pulpy matter (Pomace) is pumped into the secondary press. Some amount of hot water
is mixed to the Pomace from the primary press for further pressing in the secondary press to
obtain remaining amount of juice from it.
Secondary PressesThe Pomace is pressed in the secondary press to extract remaining amount of juice, called as
secondary extraction or Leaching. Juice obtained from the secondary press is passed through
vibro screen to sieve out the coarse matter. The clear juice after sieving is fed to the balance tank.
CentrifugeFrom the balance tank the juice is pumped into the centrifuge as the juice collected in the balance
tank is not clear up to the mark. During the centrifugal separation the colloidal suspension from
the juice is removed. The colloidal suspension from the juice consists of pulp and other
suspended solids and these are removed as sludge. The centrifuged juice is pumped into the
Pasteurizer.
Decanter The juice mixed with waste from centrifuge is sent to Decanter where the remaining juice is
separated from the waste, the juice is fed to the pasteurizer while as the waste is thrown out.
PasteurizerPasteurization is one of the key steps in the manufacturing
process of all the food processes. It is one of the
important unit operations from the microbiological stand
point of view. In the pasteurization process
microorganisms are destroyed. The juice is pasteurized by
heating it to 92 0C with 20 seconds of holding time. The
type of pasteurizer is PHE (plate heat exchanger). The
type of pasteurization is HTST (high temperature short
time).The PHE consists of series of parallel, closely
spaced stainless steel plates pressed in the Figure. Pasteurizer
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frame. Gaskets made of synthetic or natural rubber, seal the plate edges and ports to prevent the
intermixing of liquids. The direction of the product stream versus cooling/heating media can be
either parallel flow or counter current flow. Special patterns are pressed on the plates to cause
increased turbulence in the product stream thus achieving better heat transfer. PHE is suitable for
low viscosity fluids. The pasteurized juice should meet following standards:
Total patulin count Less than 50 ppbYeast and MOLD count Less than 50 ppbColiforms Absent E.coli AbsentSalmonella AbsentTemperature of Juice leaving Not less than 55 0Cthe pasteurizer
The TSS of the pasteurized juice is 15 0B; the outlet temperature of pasteurized juice should be
600C. The flow rate of juice in pasteurizer is 16000-18000 liters/hour.
DearomisationThe pasteurized juice is pumped into the Dearomisation unit to evaporator to stripe off the aroma
from it. The process of Dearomisation is carried out by heating the juice to 70 0C under reduced
pressure. The use of lower temperature for this purpose has the following advantages:
There is no product burning.
Less fuel is consumed and thus is
economical.
The process evaporates the aroma in the juice
this is because the aroma is collection of
volatile organic compounds. The evaporated
aroma is condensed by the cooling water
sprays from tabular column and is collected
in the cyclone separators, which is then filled
in the cans and drums to Figure. Dearomisation Unit
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be sold out separately as a valued product. The TSS content of the juice is maintained at 14-15 0B during the Dearomisation by regulating volumetric flow rate. Juice leaves the Dearomisation
unit at about 50-55 0C. There are various reasons for extracting aroma from the juice:
Aroma decreases the shelf life of the product, thus, by extracting aroma shelf life of
product increases by the decreased chances of microbial spoilage.
The aroma is sold out separately as it is the sale-value product.
Thus from the Dearomisation unit two separate products are formed
-Aroma
-juice
The juice leaving the Dearomisation unit at 50-55 0C is pumped into the Enzymation tanks. The
enzyme dosage needed for the degradation of pectin and starch is checked at this stage by taking
different samples.
Enzyme Mixing TanksThe juice leaving the Dearomisation unit enters the enzyme mixing tanks. There are five enzyme
mixing tanks with each tank having a capacity of 14000 litres, to ensure the continuous flow of
the product. The enzymes are added to the dearomised juice in these tanks. The following
enzymes are added:
-Amylase
-Pectinase
Amylase degrades the starch while as the Pectinase degrades the pectic substances to make the
product starch and pectin free because they pose clarity problems in the final product. The
holding time of 1 hour is provided to give
enzymes an appropriate time required to degrade
the starch and pectin. The enzyme are added at
the dosage of 70-80 grams/ton but however is
not same throughout the year as it depends upon
the maturity of fruit, with more mature fruits
requiring less dosage and likewise. It is essential
to make the juice starch and pectin free because:
- They pose clarity problems in the final
product. Figure. Enzyme Mixing Tanks
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-The starch and pectin substances clog the pore of Ultrafiltration membranes, thus impair the
efficiency of Ultrafiltration membranes. After the holding time of one hour various starch and
pectin tests are carried out that should be negative. After the starch and pectin tests read negative
then fine dosing is carried out.In the process of fine dosing Bentonite, Gelatin, and silica sol are
used together with the various fining agents to obtain better clarity on the final product. These
chemicals are used for the following reasons:
Fining agents: improves clarity and color of the product i.e. the stability of the product
Bentonite: settles down the suspended materials and other impurities that get deposited in
the triangular tank and are removed as sludge afterwards.
Gelatin: improves color and clarity by reducing the content of polyphenols, tannins and
HMF but increases turbidity.
Silica sol: Since the addition of gelatin increases the turbidity, to decrease it silica sol is
added.
After the fine dosing of the juice a minimum of 30 minutes holding time is essential to allow
these compounds to act properly and to provide the suspended particles, impurities, etc enough
time to settle down in the form of sludge. After fine dosing the juice is forced into the Ultra
filtration unit.
Ultra filtrationThe juice is pumped into the Ultrafilteration feed tank. The tank feeds the Ultrafilteration
membranes for subsequent processes. In the Ultrafilteration feed tank the outlet pipe that feeds
the Ultrafilteration is fitted as such that it is raised
to the few feet above the bottom. The purpose of
this is to keep the juice in the bottom of the tank
away from the Ultrafilteration as it contains sludge
that may block the pores of the membranes, thus the
bottom portion is to be drained out.
Ultrafiltration is a process that uses membrane as a
separation barrier. The membrane is porous which
separates a solution into its constituents based on
the molecular shape and size. The size of the pores Figure Ultrafilteration Unit
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determines its separation properties. An operating pressure of 1-10 bars is required to obtain
acceptable flow of liquid through the open structure of these membranes. The membranes are
having the pore size of 0.02 microns, and there are 63 membranes in it. The membranes are in
the form of tubes, grouped together in the bundles. The flow rate of the juice pumped into the
Ultrafiltration membranes is 125000 liters/hour; the flow rate of this level is optimum to prevent
choking of the membranes pores. The output capacity of Ultrafiltration is 16000 liters/hour.
Membranes retain the particles above the size of 0.02 microns allowing the fine juice to pass
through to obtain 99.99% clear juice.
The clear juice from the Ultrafilteration unit is pumped to the fine juice tank after testing the
clarified juice samples taken from Ultrafilteration unit. The juice is tested for the following
Clarity Should be a minimum of 95%Color NaturalTurbidity Less than 1 FNU
Fine Juice Tank-IThe clarified juice from Ultrafilteration unit is pumped into the fine juice tank-I. From where it is
transferred to stabilization unit, and on the way PVPP inline dosing is done. The PVPP absorbs
Patulin, tannins, polyphenols, thus absorbs the dark color while giving it clarity. The PVPP is fed
at a rate of 150 metric cube/hour.
Stabilization PlantAfter preparing PVPP solution in DOSMAT tank, it is injected into the juice pipeline by a dosing
pump at high pressure. The flow is regulated by FCV (flow control valve). The juice-PVPP
mixture is then fed into the FILTEROMATE TANK. The FILTEROMATE tank has a stalk of
perforated plats transverse by the juice pipe which has got perforations at the respective plate
sites to pour the juice-PVPP mixture over the plate. The juice passes through the porous plates
and is collected at the bottom via a separate pipeline, while the PVPP is retained over the plates
and is not allowed to pass through. The juice collected is virtually of good clarity and color. The
PVPP retained over the plates is regenerated using caustic CIP and is then pumped back into the
DOSMAT tank, for the further use. The juice leaving the fine juice tank-II having now the TSS
of 14-15 0B is pumped into the concentration unit.
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PVPP: PVPP is the polymerized vinylpyrrolidone. It has a high absorbing power for soluble and
insoluble tanning agents, especially for anthocyanogens or polyphenols. Nut is insoluble in beer,
caustic soda and light acids. Treating the juice with PVPP will reduce the concentration of the
polyphenols. This will raise the colloidal stability the intended effect. All the other quality
characteristics won’t change.
Regulations by law: The application of PVPP is allowed up to 70 grams per hl beer in
Switzerland, upto 50 grams per hl beer in western Germany.
Characteristics of PVPP:
1. Swelling: PVPP swells in water. This swelling is necessary to raise the efficiency of the
stabilization. It is useful to prepare a day before the first use.
2. Particle size distribution: It varies over a wide range (1 to 450 micrometers). 30-40% of the
particles are smaller than 60 micrometer. The specific volume is six times higher than Kieselgur.
3. Compressibility: swelling of the material causes compressibility of the PVPP. This is the
reason why smallest particles are pressed into the filter elements during filtration. Even cleaning
by the moveable spray tube, mechanical cleaning is recommended now and then.
Preparing the PVPP: The DOSMAT mixing vessel is filled with the warm water (400C). The
ratio of PVPP to water is 1:10 or 1:12. For the proper swelling the preparation should be done
one day before use.
Loss of PVPP in the beginning: The extreme wide range in the particle size distribution is the
reason why a lot of fine particles are lost during the foremost regenerations.
Loss of PVPP per regeneration: The loss of PVPP during regeneration will lower to 1 to 2%
per regeneration.
Adding of PVPP: It is best to add PVPP before the entering of the residual PVPP in the plant.
Then the DOSMAT is being spouted out and consequently, the adding reaches a mixing ratio of
about 1:10 or 1:12.
Fine Juice Tank-IIThe PVPP treated juice is taken to the Fine juice tank-II, from where it is pumped into the
concentration unit. The samples are taken for the quality tests.
ConcentrationThe process of increasing the quantity of a component in a solution. That is the opposite of
dilution. The juice is concentrated in the concentration unit, the concentration is meant to
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increase the TSS of the juice from 150 B. The process is carried out by heating the juice at 700C
under reduced pressure. The heating is done by means of PHE (plate heat exchangers)
evaporating the water. The concentration is continued till the TSS reaches 710B. The juice is then
sent to the concentration mixing tanks (Blending tanks). The concentrate leaving the
concentration tanks now having the TSS of 700B +/- 0.50B is pumped into Blending tanks.
Blending TankThe mixing tanks are meant for providing proper holding time to the product to ensure proper
mixing and homogenization. The homogenizations tanks have agitators that continuously agitate
the product. There are two homogenization tanks to ensure continuous flow of the product with
each tank having a capacity of 2.5 MT per tank. The following tests are conducted at this stage to
ensure quality:
Acidity
Brix
Clarity
Color
Turbidity
Stability
Mobility
TPC
Yeast and Mold
Coliforms
E. coli
Concentrate Sterilizer
From the blending tank, the concentrate is
pumped into the sterilization unit. Sterilization
refers to the complete destruction of
microorganisms. Because of the resistance of
some microbial spore to heat, this requires a
treatment of temperature above 100 0C. The
degree of sterilization at which all the pathogen
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and toxin forming organisms have been destroyed, as well as all other types of microorganisms
which if present could grow in product produce spoilage under normal handling and storage
conditions is called as commercial sterilization. The sterilization is carried out at 105 0C with the
holding time of 20 seconds. The sterilization is meant to achieve a commercially sterile product
(free from microorganisms) for longer shelf-life. The sterilization unit is again a PHE system.
Again the above mentioned tests are conducted to check the efficiency of sterilizer. The
concentrate leaving the sterilization unit is cooled to 10-12 0C and is sent into the filling unit or
to the cold store.
FILLINGAs the sterilization is completed the concentrate is sent into the filling unit through the pipeline.
The pipeline has three valves i.e. for aseptic, non aseptic filling and cold store which are opened
accordingly.
Aseptic filling: The
aseptic filler
receives drums or
bins through roller
conveyers the
operator places the
presterilised bags in
the container
(capacity of 275kg)
then they are automatically transported under the filling station. The presterilised
bag is manually placed under the aseptic chamber in a sterile
environment saturated by over pressure steam. The cap is automatically removed,
the bag filled with sterilized product then recapped. At the end of filling cycle, the
roller conveyer transports the containers to the exit..
Non-aseptic filling: in this case the sterilized concentrate is filled into the open
top HDPE food grade drums non-aseptically that is the juice from the sterilizer is
filled directly in cans.
After filling the concentrate is dispatched accordingly.
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Cold Store:
If the concentrate is not to be filled then it is sent into the cold store. At the FIL industries limited
there are 13 tanks in the cold store with each having capacity of 50 metric tons. The concentrate
sent into the cold store is again sterilized before dispatch.
Figure: Storage Tanks in Cold Store
Machines Used in the Consumer Division
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The manufacturing process of apple juice concentrate is a complex process and therefore,
requires a lot of machines and equipments. There are various machines and equipments installed
at the FIL industries limited. FIL industries use technological advancement from Germany, Italy,
Australia, United Kingdom.
Fruit Mill The mill crushes the fruit into the mash. It consists of a high speed rotor fitted inside a
cylindrical chamber. There are hammers fitted on this high speed rotor that crush the fruit. The
pulverizing action of the hammer mill creates a uniform mash that translates to greater surface
area, as a result upto 15% more juice is yielded in downstream processing. The chamber walls of
the fruit mill have smooth or lined with corrugated breaker plates. The hammers are fixed or
swinging. Swinging hammers are used when it is necessary to reduce the risk of damage in the
case of encounter between the hammer and large hard chunks. The principle crushing action
takes place as a result of the collision between the fruit and the hammers. The leading face of the
hammer is blunt or sharp. Very sharp hammers are used in case of fibrous materials where some
shearing action is necessary. The chamber exit is fitted with the interchangeable screens that
permit continuous removal of the sufficiently small particles, while the large and over size
material is retained for further size reduction.
Bellmer PressOwing to international competition, the fruit juice and concentrate manufacturing plants have to
produce high quality juices and concentrates despite small margins. This requires three things at
the minimum:
- Best utilization of the raw material.
- Lowest investment costs.
- Lowest operating costs.
Due to the continuous and fully automatic operating belt filter press ensure compatible and safe
handling and can be easily integrated in the entire production processes. Short timing presses of
approximately 4 minutes allow production of high quality juices. In addition to it, the acquisition
and operating costs of the belt filter presses are favorable in comparison with other systems.
The Bellmer press offers following advantages:
Open construction for easy handling and cleaning.
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Fully Automatic operating and ensures continuous flow.
New developments can be easily fitted.
Yield of 84% by weight in primary pressing.
Careful mash handling, less sediment content.
Machine frame is stainless steel, hence easily cleaned.
Water saving high pressure belt cleaning device.
Hydraulic belt tensioning for highest press pressure.
Automatic belt alignment control.
Slowly increases pressure for low turbidity in juices.
Dry matter content increases in pomace of 3.5%.
The integrated high pressure area can be retro-fitted to existing plant.
The roller configuration and exceptionally long high pressure press area ensure highest
possible juice yield.
Process Technology The Bellmer press shows great flexibility owing to its roller configuration. The use of the press is
advantageous. The process stages within the press are optimized consistently in order to use the
shearing and kneading action between the belts.
Machine EquipmentsThe Bellmer press has following machine parts:
Rolls
Bearings
Belt tensioning device
Belt guide control
Scraper
Rotary brush
Belt cleaning
Rotary brush slightly touches the belt when machine is in no-loading operation (i.e. when no
mash is on the belt).
Construction
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The machine frame is completely executed in stainless steel. This enables an easier cleaning and
longer lifetime of the machine.
All the parts correspond with the highest standards of Bellmer Quality. Al roller bearings have a
designed life time of 10,000 operating hours. Belt tensioning is executed with the proven
hydraulic control. The patented water saving high pressure rotor belt cleaning guarantees the
problem free application of soft stored fruits.
Juice production: The juice in the Bellmer press is produced in the four stages
Pre-extraction (1st stage): The fresh mash is fed across a horizontal belt. A large part of the
juice sums up as a result of gravity. The WPW is equipped with an adjustable pressing belt. This
is the step for maximum yield of juice.
Wedge section (2nd stage): After the preliminary extraction the two circulating belts form a
vertical wedge shaped section. The extraction is affected by slowly increasing pressure resulting
from the belt movement, the height of the section and the adjustable setting angle of the wedge.
Low pressure press section (3rd stage): The mash is fed around the first perforated rolls by the
two belts. Here the extraction is affected directly to the outside and additionally to the inside.
High pressure press section (4th stage): It is the S-shaped section. The mash cake between the
belts is extracted. The resulting kneading and shearing action free the enclosed liquid to obtain
the very high yields. The relatively short press time of 3.5 minutes ensure minimal oxidation.
The high pressure press section of the WPX is equipped with the additional press rolls and press
nip.
Juice collection: The juice extracted from the mash in the primary press runs off at different
positions and is collected in the trough below the perforated roll from where it is guided farther
via one outlet.
Cleaning Daily cleaning: involves rinsing with cold water or hot water having temperature
of 600C.
Weekly cleaning: involves use of cleaning agents in proper concentration for 15
minutes and then rinsing with cold water.
Plate Heat Exchangers
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Introduction:The plate heat exchanger invented more than 70 years ago has found wide application in the
dairy and food beverage industry. a schematic of a plate heat exchanger consists of a series of
parallel, closely spaced stainless steel plates pressed in a frame. Gaskets, made of natural of
synthetic rubber, seal the plate edges and ports to prevent intermixing of liquids. The gaskets
help to direct the heating or cooling and t he product streams into the respective alternate gaps.
The direction of the product stream versus the heating/cooling stream can be either parallel flow
(same direction) or countercurrent flow (opposite direction) to each other.
Figure: Plate heat exchanger
The plates used in the PHE are constructed from stainless steel. Special patterns are pressed on
the plates to cause increased turbulence in the product stream, thus achieving the better heat
transfer. Plate heat exchangers are suitable for low viscosity (< 5 pa s) fluids. If suspended solids
are present, the equivalent diameter of the particulate should be less than 0.03 cm. larger
particulates can bridge across the plate contact points and “burn on” in the heating section.
Advantages of PHE:
Plate heat exchangers offer various degrees of advantages as:
Maintenance of PHE is simple, can be easily and quickly dismantled for product surface
inspection.
Sanitary design for food applications.
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Capacity can be easily increased by adding more plates to the frame.
With PHE we can heat or cool product to within 10C of the adjacent media temperature,
with less capital investment than other non-contact type exchangers.
PHE offers opportunities for energy conservation by regeneration.
SCHMIDT-BRETTEN PHEThis type of PHE is used worldwide in the most varied industrial fields. For exchange between
liquid or vaporous media at various temperatures. The heart of every unit consists of the
corrugated heat exchanging plate made of various materials depending on the conditions of
application. A gasket fitted to the edge of each plate is then installed into a compact frame
together, thus forming flow channels for the media.
Plates and gaskets: For the various areas of application there are SIGMA
plates with different corrugation patterns. The plates
are made of the stainless steel material. The surface
area varies from 0.06 to 2.4 meter square. For the
sealing of the flow channels, soft Gaskets (e.g. NPR,
EPDM) or Hard Gaskets (e.g. IT) are used in it.
Gaskets are used between the plates to seal and
separate two fluids either glued in place or affixed
using glue free or mechanical design. In order to
replace the gaskets, the heat exchanger plates have to
be removed from the frame. It is noteworthy to note
that the PHE plates must be unpressurized and
cooled down (maximum 30-400C) when they are to Figure: Plate of PHE
be removed.
Removal of gaskets:The plates have to be cleaned and examined to find out the possible damage. The worn out
gaskets are detached by warming the back of the gasket groove with hot air or a weak solder
flame, but this has to be done so as to prevent the formation of tarnish on the plates (particularly
important with the titanium plates). In case of large number of plates or a very short operation
Page | 22
stop of PHE, the gasket can also be detached by plunging the plates into the liquid nitrogen (-
1960C). The remaining gasket and adhesive particles still sticking in the gasket grooves must be
removed by:
- Mechanically: by shoving them with a stainless steel scraper or with emery/ abrasive paper.
- Chemically: with solvent following by mechanical cleaning.
Plate arrangement: Plate are arranged in the form of “L” style (left hand flow) or “R” style (right hand flow) to
alternate two opposing fluids in heat exchanger. Assembly of thermal plates between the fixed
frame plate and the moveable pressure plate is called “Plate Pack”.
Flow channels:The plate pack is clamped between the cover and the frame head by means of tie rods on each
side of the unit. This results in the formation of narrow flow channels between the plates that are
sealed together by gaskets. These channels are connected to the flow ports on the frame head,
through which primary and secondary media flow into and out of the appliance.
Frame: As a standard All the SCHMIDT plate heat exchangers come completed as a frame with closure
either by means of screws or spindles. All parts of the frame are lacquered, or if required
stainless steel clad. In the food and beverage industries spindle frame closure are preferred. The
plates are clamped together by means of one or two spindles, that press against the centre of
moveable cover so that it does not take the long to open and close the unit.
By combining plates of different corrugation patters as well as varying the plate size an optimal
adaptation to each area of application can be guaranteed. The materials for the plates as well as
appropriate gaskets are chosen according to the operating temperatures and the media which are
run through the unit.
Installation: While installation of PHE following points should be born in mind:
Sufficient floor space must be provided on at least one side to allow adequate working
space for the installation and removal of the plates, for installation and loosening of the
rods, for tightening the plate pack and for fitting the connection pipes.
The unit must be brought into its final position before the connection pipes are fitted.
Cleaning:
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Deposits and dirt accumulated on heat exchanging surface may considerably is called as fouling.
Fouling affects heat transfer and cause corrosion of the plates and thus decreasing the efficiency
of PHE. Regular cleaning not only serves to maintain heat exchanging performance, but it is also
necessary to maintain and preserve the valuable unit.
Fouling: type and frequency of cleaning depends on the type of fouling. Fouling can be
minimized by increasing the velocity of PHE at regular intervals. This creates larger turbulence
that removes scale deposits. If solids are present in the fluid, then strainer or filter must be placed
in the pipeline that feeds the PHS to prevent them from entering PHE.
There are different types of fouling as:
Scaling: It is a common form of fouling caused by high concentration of calcium,
carbonate, CaSO4, silicates in the cooling water. It can be removed chemically by CIP or
COP and using soft brush and running water. In chemical cleaning 4% water at 140 0F,
nitric acid, and sulfamic acid and complexing agents such as EDTA & NTA.
Biological fouling: This type of fouling is caused by the microorganisms.
Sedimentary fouling: This type of fouling is caused by metal oxides, corrosion product of
slit, alumina.
Residual fouling: caused by Hydrocarbon based deposits from oils, asphalt and fat.
Gross fouling: plugging caused by fibers, assorted solids and seaweed.
CIP procedure: Close all valves and drain exchange through CIP.
Flush both sides with water (100-1200C) until water is clear and free process fluids.
Completely drain rinse water from CIP system.
Refill the CIP system with water and add cleaning solution.
Circulate cleaning solution at 140-1800C for 3-6 hours.
Crain cleaning solution from CIP and flush with boiling water. Do step 2 and 3 again.
Close valve to CIP system.
Start up.
Maintenance:
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Apart from regular cleaning of the heat exchanger surfaces, the proper maintenance is essential.
Some standard rules are to be followed for performing maintenance work:
All plates are stamped with an L at one end and R at the other.
Odd number plates (1, 3, 5,…) are installed in R at top and even number plates (2, 4, 6,
….) with L at the top to alternate fluid flow at every other channel.
Pasteurization Plant:This plant is used to pasteurize the apple juice with 10-120B, pulp content maximum 2%, and
size of fiber maximum of 1 nm. It is a continuous-process pasteurization plant.
Data of performance and consumptionInlet temperature 10/200CHeating temperature 950COutlet temperature 20/500CInput rate of apple juice 20,000 l/hSteam requirement 1,400 kg/hPortable water for startup/rinse 18 m3/hCooling water, 150C/300C 23/10 m3/hElectrical power, installation value 19.4 kWInstrument air 1 Nm3/h
The product must not exceed a chloride ion content of 50 ppm; otherwise there will be a risk of
corrosion.
Description Of Most Important Components Of Pasteurization Plant:
This short time heating plant essentially consists of the following plant sections:
Balance tank: Incoming product is delivered to the balance tank. The tank is installed to make
sure continuous processing of pasteurization plant.
Product pump: The product pump, delivers the juice via heat exchanger pre line, holding tube,
heat exchanger return line and cooler.
Level probe: Anti-dry ran protection for the product pump. It stops when level reaches to certain
point.
SCHMIST plate heat exchanger: In the heat exchanger the juice will be heated upto
pasteurization temperature and cooled down to filing temperature.
Heat exchanger hot water circuit: In the tubular heat exchanger the circuit water will be heated
by means of saturated steam at 2-3 bars.
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Hot water pump: With the hot water pump, the water is pumped to the tubular heat exchanger
fed with steam. Afterwards the water reaches the heat exchanger and flows back to pump.
Steam control valve: The steam control valve controls the required steam flow rate.
Cooling water control valve: The water control valve controls the required water flow rate.
Temperature control loop for heating: The required temperature for heating is sent on the
electronic controller.
Butterfly valve: The butterfly valve is required for the sterilization/CIP plant. The butterfly
valve is only required to separate product/water and for cleaning.
Flow control valve: The product control valve controls the required product flow rate.
Flow meter: The installed flow meter indicates the flow rate of the product.
Holding tube: The installed average holding time for apple juice has to be 20 seconds.
Control Cabinet: The control cabinet which accommodates the control components is located
on the plant on site.
Ultra Filtration
Introduction: ultra filtration uses membrane as a separation barrier but in this case it is a porous
membrane which separate the solution into its constituents based on the molecular shape and
size. The size of the pores determines its separation properties. Operating pressures of only 1-10
bars are required to obtain acceptable flows of liquid through the open structure of these
membranes.
Ultra Filtration Plant And Process:
FIL industries Limited clarify the apple juice solution by Ultrafilteration. This is the separation
of the clarified juice from the pulp by passing the feed solution over a semi-permeable
membrane.
When pressure is applied to the feed solution, the membrane allows the passage of water
and small molecules (referred to as permeate) but retains the larger pulp molecules in the
solution (referred to as concentrate).
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Within this plant, the membranes
are in the form of tubes, grouped
together in bundles of 19. They
are equipped with end caps such
that the solution passes through
the 19 tubes in parallel before
leaving the module.
This tube bundle is enclosed in a
cylindrical shroud for permeate
collection, similar to the shell of
a shell and tube heat exchanger.
The whole assembly is termed as
A19 module.
A module with similar construction minus the internals is used as a heat exchanger for
the temperature control. This is termed as A19 heat exchanger.
Modules are mounted on the framework to form a stack. Pipe work is provided to
distribute fluid to the modules and collect concentrate and permeate from the modules.
The fluid passes through 13 modules and one heat exchanger in series.
To ensure the correct fluid velocity is achieved in the module, the solution is pumped
through the module stack using a feed pump which maintains the correct velocity across
the membrane surface.
As delivered each stack is fitted with 13 membrane modules, giving a membrane area of
32.5 m2 and one A19 heat exchanger. The total plant membrane area is 162.5 m2.
Feed solution from the feed/batch tank is fed via the feed pump FPI to the module stacks.
The flow rate is measured and controlled.
The feed tank enters the 5 processing stacks in parallel.
Within the modules some permeate is separated and the pressure falls. The concentrate
leaving the modules return via a pressure control valve to the feed tank for further
processing.
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Within the module some permeate is separated and the pressure falls. The concentrate
leaving the modules returns via a pressure control valve to the batch tank for the further
processing and the permeate flows by gravity to the permeate break tank.
Cleaning of UF plant
During the course of process operation the surface of the membrane will become dirty restricting
the flow of permeate, this plant runs at constant module inlet pressure so the permeate flow will
gradually decline. To counteract this membrane must be cleaned and the method used is CIP
(cleaning in place). A cleaning solution is circulated through the plant at upto 550C. After a
timed period of circulation the cleaning solution is drained from the module tubeside using clean
water from the CIP tank. Finally the module shrouds are refilled.
Preservation
If the plant is to remain unused for more than two hours, it should be preserved. This
preservation solution remains in the plant during the period of the shut-down. The solution must
be thoroughly displaced from the plant before it is returned to process operation.
DIAFILTRATION:
In case of ultrafiltration and Nanofiltration the amount of small molecular weight material or
mineral salts removed respectively can be enhanced by adding water to the feed. This added
water then washes these components out of the concentrate as permeate thereby reducing their
level in the concentrate. This technique is called as Diafiltration.
This simply involves addition of water to the feed tank so that any dissolved solids remaining in
the concentrated apple pulp will be dissolved in water and be recovered as permeate. The water
added should be demineralized, and at the same temperature as the apple pulp.
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Laboratory Analysis of Fruit Juices
AIM: Determination of the acidity of juices
Reagents
0.1 N NaOH, Phenolphthalein.
Procedure
a. For Juices
1. By pH meter
A. 20 ml of juice was taken in a clean beaker and the pH meter was switched on.
B. After the pH meter was switched on, it was kept on for 15 minutes before it was used for
checking the pH of the juice.
C. The pH meter was also calibrated with 7.0pH or 4pH or 9 pH solutions.
D. The pH of the sample was observed on the digital dial.
2. By Phenolphthalein method
A. 20 ml of juice was taken and diluted with distilled water with pH of 7.0.
B. Few drops of phenolphthalein were added and the solution was titrated against 0.1N NaOH.
C. Color change was observed and the volume of 0.1N NaOH was noted down.
Calculations
Acidity = ml of NaOH used × Normality × Molecular Weight of major acid × 100
Weight/volume of sample taken × 1000
b. For Concentrate
1. 2g of Concentrate was taken in a clean beaker which was diluted with the distilled water with
pH equal to 7.0.
2. Few drops of phenolphthalein were added and the solution was titrated against 0.1N NaOH.
3. Color change will be observed and the volume of 0.1N NaOH is noted down.
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Calculations
Acidity = ml of NaOH used × Normality × Molecular Weight of major acid × 100
Weight/volume of sample taken × 1000
RESULT: acidity was 0.98
AIM: Determination of Brix of fruit juices
Introduction
Brix is defined as the percentage of dissolved sugar in a water solution on a weight for weight
basis and is expressed in degrees Brix (°B). Thus, for example, a 10°B solution implies that in
100g of solution there are 10g of dissolved sugar. Brix can be calculated by using different
types of refractrometers- Hand held Refractrometer, Abey’s Refractrometer and Digital
Refractrometer. The major disadvantage of Hand held Refractrometer is that the temperature
can’t be controlled which leads to faulty results.
Procedure
By Abbey’s Refractrometer:
The temperature of the refractrometer was maintained at 20oC and water was circulated
through water bath which helped to keep the refractrometer at constant temperature.
The refractrometer was calibrated with the help of distilled water. The prism of the
refractrometer was dried by tissue paper which could have otherwise diluted the sample
when placed on it.
The sample was placed on the prism of the refractrometer and the Brix readings were
observed
Results
The value of TSS (oBrix) was found to be 68oBrix.
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AIM: Determination of clarity/transmittence of fruit juices
Introduction
Clarity is calculated in %age. According to International Standards, for calculating the clarity,
Juice should have 11.28oB and should be clarified. According to German Standards, TSS of
fruit juice should be 12oB. For clarified juices, clarity should be >90%. Clarity of juices is
checked at 625nm. Cuvits are also to be calibrated before experiment.
Procedure
1. The Spectrophotometer is calibrated with the help of distilled water.
2. The sample has to put in the photo spectrometer and the readings noted down.
AIM: Determination of colour of fruit juices.
Introduction
Color of fruit juices is calculated at a wavelength of 440 nm and the TSS of the fruit juice
should be 11.2 -12oBrix. It is calculated in %age.
Procedure
1. The Spectrophotometer was calibrated with the help of distilled water.
2. The sample was put in the photo spectrometer and the readings were noted down.
Results
The clarity of juice was calculated to be 12%.
AIM: Determination of turbidity of fruit juice.
Introduction
Turbidity can either be checked by Turbidity meter or by spectrometer. Turbidity is expressed
either in Indian Units- NTU (Napthelenic Turbidity Unit) or as per German Standards- FNU
(Farmezine Napthalenic Unit).
Procedure
D. By Spectrometer:
1. The Spectrometer has to be switched on and the wavelength of the spectrometer is to be set
at a wavelength of 860nm absolute.
2. The sample is then put in the Spectrometer and the readings are observed.
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AIM: Determination of shelf-life stability of fruit juices (shelf-life testing of fruit juices).
Procedure
Different methods are used to determine the shelf life of fruit juices;
Method I:
1. The apple juice with TSS of 11.2oB was prepared from apple Concentrate by diluting with
distilled water.
2. The juice and Ethanol were mixed in a ratio of 50:50 and the solution was allowed to stand
for about 1 hour.
Results
No Turbidity or precipitation appeared in the juice indicating the good shelf life of the juice.
Method II:
1. The apple juice with TSS of 11.2oB was prepared from apple concentrate by diluting with
distilled water.
2. The juice and acetone were mixed in 50:50 ratios in a test tube.
3. The solution was allowed to stand for 24 hours
Results
No Turbidity or precipitation appeared in the juice indicating the good shelf life stability of the
juice.
Method III:
1. The juice prepared from concentrate was pasteurized at a temperature of 70oC for 20
minutes.
2. The solution was hold for 24 hours at 60oC.
Results
No Turbidity or precipitation appeared in the juice indicating the good shelf life stability of the
juice.
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THE FOOD & BEVERAGE DIVISION
The food and beverage division is engaged in the production of a wide range of juices, beverages
and packaged drinking water that are perfect combination of taste and nutrition and refreshment.
These products are so designed as to meet the individual nutritional needs and are also smart and
healthy beverage choices. The products from the F & D division come in tetrapack and PET
bottles which retain the natural freshness of the juice. Some of the leading product brands of
FIL’s F & D division are:
Tuk 3
Frugo mango
Fruitfill
7- springs
Essentially a prime table fruit, mango pulp is perfectly suited for conversion to juices, nectars,
drinks etc. Although fruit juices were originally developed to use up the surplus fresh fruit
production, fruit is now grown for juicing. A variety of juices is available at FIL. These includes:
apple, pineapple, mango & mixed. The quality of juice depends essentially on the species &
maturity of the fresh fruit. The main factors that influence the quality are the sugar to acid ratio,
the aroma volatiles, and the phenolic components of ascorbic acid content. Satisfactory juice
productions depend on sound judgment of the raw materials & blending procedures adopted. A
key step in the processing of fruit juices from the packaging point of view is the deaeration step.
This is important both to minimize oxidative reactions in the juice (e.g. oxidation of ascorbic
acid & flavor compounds) & reduce corrosion if the juice is packaged in a metal container. The
four key deteriorative reactions in juices are microbiological spoilage, non-enzymic browning,
oxidation resulting in loss or degradation of flavor components and absorption of flavor
compounds by the package. Although preservatives were commonly added to fruit juices to
overcome microbiological problems. At FIL industries the juice is packed in PET bottles and
Page | 33
Tetra packs.
PET DIVISION
In the PET division at the FIL industries ltd. processing and packaging of drinking water (7-
SPRINGS) and fruit juices (FRUGO MANGO & FRUITFILL) is undertaken. The underlying
technology involved in both the processes is same however a CIP (by nitration and caustic soda
treatment) of the line is done essentially in order to alternate between the two processes. The
entire process is carried out in fully aseptic conditions. And the final product is sourced to the
consumer in durable and attractive packing options, after processing and packaging in FIL's
state-of-the-art plant, with a univocal assurance of the highest standards of hygiene and quality.
PET (Polyethylene Terepthalate)
Commonly abbreviated PET, PETE, or the obsolete PETP or PET-P, is a thermoplastic
polymer resin of the polyester family and is used in synthetic fibers; beverage, food and other
liquid containers; thermoforming applications; and engineering resins often in combination with
glass.
PET (polyester) enjoys a substantial growth as a packaging material across global markets
and for diverse applications. Its replacement of glass, metal, and other plastics has been quite
remarkable — no other rigid plastics packaging sector has matched the growth rate of PET
bottles over the last 20 years. PET is now a commodity polymer competing directly with
polyolefin’s and styrene’s in the markets for food and beverage packaging, as well as for other
products.
Introduction To Pet Bottle Launch (7-SPRINGS)
Launching of packaged drinking water by the name 7-Springs lately, in the market is
considered as one of the important milestones in the success history of FIL industries ltd. There
are several national brands of mineral water available in the market. But then since Kashmir’s
water is quality-wise better, so it was thought to launch this product not only in Kashmir but also
throughout India. Each drop of its water is purified as per the international standards. The
processing is done in such a way that all the natural minerals of the water are retained and a
balanced mineral content is maintained. Besides, it is ensured that all the organic matter,
bacteria, other micro-organisms, suspended matter, residual chlorine and odors are removed. The
bottles remain untouched right through the rinsing, filling, capping and labeling operations. It is
rather filled automatically and the cap is also fixed automatically. The company develops two
pack sizes of the product, viz. 1 liter and 20 liters, so as to suit the need of every individual. FIL
Industries Ltd is committed to offer pure drinking water to its consumers and they therefore
follow rigorous R&D and stringent quality controls, so as to make 7-Springs the most preferred
brand in packaged drinking. The water is put through multiple stages of purification and is
ionized before making it available for consumption. It is ensured to maintain strict hygiene
conditions in the plant. The consumer satisfaction has always been the focus of the company.
Manufacturing any product always ensures to provide the best quality to the consumers. Both the
consumer and food and beverage divisions of FIL are ISO and HACCP certified in order to
strengthen the commitment of world-class standards and quality parameters. FIL offers a wide
range of juice and beverage products keeping in mind the distinct tastes of the consumers. These
products not only meet the individual nutritional needs, but are hygienic and tasty as well. The
latest technology is used in the manufacturing and packaging so as to keep the juices fresher for
a longer period of time without any added preservatives. The entire product range is available in
tetra pack and PET bottles that retain the natural freshness of the juices.
Packaged Drinking Water
Clean drinking water is essential to human and other life forms. Access to safe drinking water has improved steadily over the last decades in almost every part of the world.
Page | 35
Different Stages Of Processing Of Packaged Drinking Water
SOURCE {Bore-well 2}
SAND FILTER {Filtration & removal of mud}
BALANCE TANK 1{Continuous supply to degasser}
DEGASSER {Removal of dissolved gases & odors}
FINE SAND FILTER {Further filter removal of mud}
ANTI-SCALANT DOSING REVERSE OSMOSIS UNIT {Residue water out}
OZONATOR PRODUCT TANK {Ozone is added to improve quality}
FILLER BALANCE TANK
RINSING BOTTLE FILLER {Filling of bottles}
CAPPING BOTTLE DRYER {Drying of bottles}
LABELLING
PRINTER
SHRINKING OF LABELS
PACKAGING
COOLING PERIOD
STORAGE
Page | 36
Source: The water for packaged drinking is extracted from an officially recognized. Certain
parameters which are taken into consideration while choosing the source are:
1. Hydrological distribution
2. Physical & chemical characteristics of water
3. Microbiological analysis
4. Level of toxic substances
5. Freedom from pollution
6. Stability of the source
Generally, the source should be deep aquifier with a long transit time and few cracks or
fissures. In case of shallow aquifier the main concern is the possibility of the surface water
passing more or less directly into the source. However, no aquifier is 100% free from pollution.
In general the source of water at FIL Industries is 200 feet above the ground.
Abstraction: The means of extraction depends on the nature of the source. Spring water
typically rises from spring through a bed of gravel while water from wells and bores do not
require pumping. Contamination of the point of source should be carefully avoided. Pumps used
for abstraction may become a source of contamination which needs to be carefully prevented.
Precautions must be taken against pollution from ancillary operations. The abstracted water is
then kept in a tank till further processing called as a reservoir tank. Here settling of heavy
suspended material takes place. And thus partial purification of water is achieved.
Sand Filter: Here in filtration and mud removal takes place. Filtration is commonly the
mechanical or physical operation which is used for the separation of solids from fluids (liquids or
gases) by interposing a medium through which only the fluid can pass. Oversize solids in the
fluid are retained, but the separation is not complete; solids will be contaminated with some fluid
and filtrate will contain fine particles (depending on the pore size and filter thickness).
Sand filters are used for water purification in FIL industries. They are typically 1 to 2 meters
deep & can be rectangular or cylindrical. The length & breadth of the tanks is determined by the
flow rate desired by the filters which usually is 0.1 to 0.2 meters per hour. In general, there are