Design and development of composite nonwoven filter for pre-filtration of textile effluents using nano technology Under the guidance of Dr.J.P.Singh & Dr. Devendra prasad UPTTI Kanpur & Dr. Anurag Shrivastava DMSRDE Kanpur By Vivek Kumar Sharma Department of Textile Technology Uttar Pradesh Textile Technology Institute Kanpur
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Design and development of composite nonwoven filter for pre-filtration of textile effluents using nano technology
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Design and development of composite nonwoven filter for
pre-filtration of textile effluents using nano technologyUnder the guidance of
Dr.J.P.Singh & Dr. Devendra prasadUPTTI Kanpur
&Dr. Anurag Shrivastava
DMSRDE KanpurBy
Vivek Kumar Sharma
Department of Textile TechnologyUttar Pradesh Textile Technology Institute Kanpur
ABSTRACT• “Waste Water filtration as a global challenge
for textile dyeing industry in the present time and Nanofibre filtration as an advanced solution”
• This project discusses a Cleaner approach for minimization of waste particle in dyeing effluents with good flux permeability.
• The removal of stuff by Nanofibre (polyethersulfone) film coated over nonwoven needle punched fabric (Polyester) was evaluated for reactive dye. Results showed that membrane treatment is a promising advanced treatment option for pollution control for textile industry effluents
introduction• Textile industry is one of the major industries in the world and
plays a major role in the economy of country
• About 200 L of water are used to produce 1 kg of textile.
• The waste water produced during this process contains large amount of dyes and chemicals containing trace metals such as Cr, As, Cu and Zn which are capable of harming the environment and human health.
• The textile waste water can cause haemorrhage, ulceration of skin, nausea, skin irritation and other health issues.
Intro......................• The effluent water discharged from the textile industries undergoes
various physio-chemical processes such as flocculation, coagulation and ozonation followed by biological treatments for the removal of nitrogen, organics, phosphorous and metal.
• The whole treatment process involves three steps: primary treatment, secondary treatment and tertiary treatment.
• The primary treatment involves removal of suspended solids, most of the oil and grease and gritty materials.
Intro......................• The secondary treatment is carried out using
microorganisms under aerobic or anaerobic conditions and involves the reduction of BOD, phenol and remaining oil in the water and control of color.
• The tertiary treatment involves the use of electro dialysis, reverse osmosis and ion exchange to remove the final contaminants in the wastewater.
Intro......................• So if the prefiltration of textile effluent is good the other
next process results will go even better.• Important characteristics for achieving high performance
UF and MF are high flux in combination with desired selectivity and low fouling.
• We all know that non woven fabric is mostly used for filtration process of air and water for her messing structure and applying the Nanofibre over it is give control the pore size and give even better filtration results.
Filter method (why filtration)
• Various conventional methods are being used to treatment effluents, including biological methods, physic-chemical treatment (coagulation and flocculation), adsorption, ion-exchange and chemical treatment with oxidizing agents.
• But limitation of all these methods, however, is that-1. Total colour removal is not achieved.2. Chemical by -products are introduced3. A sludge management’s problem is also a limitation arising from the use of chemicals.4. Thus the water quality produced does not meet the requirement for textile reuse.5. Biological treatment – because of low bio degradability of most dye and chemicals used in
textile industry, their biological treatment by the activated sludge process does not always achieve great success.
6. Coagulation-flocculation treatment- generally used to eliminate organic substance, but the chemicals used in this process have no effect on the elimination of soluble dye stuffs.
7. Although this process effectively eliminates insoluble dyes, its value is doubtful because of the cost of treating the sludge and the increasing number of restrictions concerning the disposal of sludge.
Filter method (why filtration)
• Advantage of Membrane based process- • Process using membrane provide very interesting
possibilities for the separation of hydrolyzed dye-stuff and dyeing auxiliaries that simultaneously reduce coloration and BOD/COD of the waste water.
• Membrane based processes provide appealing possibilities of separating hydrolysed dye stuff and dyeing auxiliaries, thereby reducing colouration and COD removal.
• No specific temp is required for process.• No sludge formation in process.
PES Nanofibre
• PES was selected as the Nanofibre membrane material due to its high thermal and chemical resistance also its appropriate mechanical properties.
LITERATURE REVIEW
Fig show
A) Size comparison of electro spunNanofibre;B) Electro spunNanofibre compared to a normal human hair.
{Fig from- Microfiltration Membranes via Electro spinning of Polyethersulfone Solutions research will done by M. Sc. BintasanKwankhao}
Production Techniques(Nanofibre)
The main processing techniques for preparation of polymer Nanofibre.
• Electro spinning is a novel production technique of continuous ultrafine fibers (with diameters of 10 μm down to 10 nm) based on forcing a polymer melt or solution through a spinnerets with an electrical driving force. The main advantages of this technique are relatively easiness (easy to setup), high speed, low cost of the process, high versatility allowing control over fiber diameter, microstructure and arrangement and vast materials selection.
Fig 1
Fig 2
Parameter Investigation• Conversion process of polymer solution into Nanofibre through
electro spinning is affected by several different parameters including: Parameter Effect on fiber morphology
Viscosity (polymer solution) ↑
Fiber diameter ↑ (from beads to beaded fibers to smooth fibers)
Surface tension ↑ Number of beaded fibers and beads ↑ Solution conductivity ↑ Fibers diameter ↓ Evaporation of solvents↑ Fibers exhibit micro texture (pores on fiber
surfaces) Applied voltage ↑ Fiber diameter ↓ initially,
Spinneret to collector distance ↑
Fiber diameter ↓ (beaded morphologies occur if the distance between the capillary and collector is too short
Humidity ↑ Fiber diameter ↓ (pores on fiber surfaces), then fiber diameter ↑
Flow rate ↑ Fiber diameter ↑ (beaded morphologies occur if the flow rate is too high)
Figure 2.3:A) Beaded electrospunnanofibers
Figure 2.3:B) Porous Nanofibre
Applications
Needle Punched Fabric• Needle punching is the oldest method of producing nonwoven products. • Needle punched fabrics finds its applications as blankets, shoe linings,
paper makers felts, coverings, heat and sound insulation, medical fabrics, filters and geotextiles.
Basic Principle -
Working principle of Needle punching Machine
Experimental Part
1. Preparation of nonwoven material2. Coating of Nanofibre over Nonwoven material3. Preparation of wastewater4. Filtration
Preparation of nonwoven material• In this project we manufacture nonwoven by regenerated
round shaped polyester fibre (staple length 51mm and fineness 1.5 denier) by UPTTI lab model machine (model- Trytex) with two different weight sample of 130 and 195 gsm.
Sr. No.
Parameters Sample A(20 gram fibre)Each 3 Sample
Sample B(30 gram fibre)Each 3 Sample
1 Sample Size 10x25 inch 10x25 inch2 Weight of sample 20 gm 30 gm3 GSM of sample 130 1954 Pore size 50-300 50-3005 Thickness 2.1 mm (approx) 3.5 mm (approx)
Preparation of Nanofibre• Polyethersulfone (PES) (Mw= 58000 and density of 1.37 g/cm3) was
from DMSRDE lab. As the sub layer of the membrane a technical polyester non-woven was used. The chemical structure of PES and DMF is shown in figure. The solvents N,Ndimethylformamide (DMF) were obtained from DMSRDE lab.
Polyethersulfone (PES) N,Ndimethylformamide
Different Solution viscosity -
. PES (%) Viscosity (Pa s)
9 0.10
15 0.52
22 1.82
Electro spinning conditionsSr. No. Parameter PES nanofibrous
Photo image of nanofiber membranes obtained by electros pining from 15% PES in DMF using the conditions, i.e., a spinneret-to-collector distance of 25 cm, an applied voltage of 20 kV, a flow rate of 25 μL/min, a spinneret diameter of 0.8 mm, stationary substrate set-up and Aluminium foil served as the substrate.
Photo image of nanofiber
Composite Membrane
No of sampleSr. No. Sample no. Non woven sample Nanofibre layers
According fibre weight (grams)
According Spraying time (hours)
1 S1 130 2
2 S2 130 3
3 S3 130 5
4 S4 195 2
5 S5 195 3
6 S6 195 5
Waste water Preparation• Preparing a waste water Sample with Medium shade Using
Salt Concentration 20g/l Nacl, 8g/l Na2CO3 & Dye 50 mg/Lit.
Method of filtration
1. Due to non woven fabric character the pore size will deform in pressure and force applied so the minimum tension will give better pore size.
2. The sample volume will filtered is 250 ml solution.
Result & DiscussionFLUX PERMEABILTY
• Flux Permeability through WaterSr. No.
Sample Classification Filtered Volume Time
Non-Woven(GSM)+ Nano Fibre Time For Spreading (Hours)
1. Result Show that the flux permeability value and permeate flux will decrease simultaneously according to thickness of nonwoven fabric and also Nanofibre.
2. 198 GSM non woven fabric permeate flux will lower than 130 GSM fabric.
3. As increasing the Nanofibre spraying time the permeate flux intensity will also decrease will so that the cleaner approach will go higher In both 198 and 130 GSM type non woven fabric.
4. The decreasing of permeate flux in both type of fabric will simultaneously
CONCLUSION• UV Results
1. Results Show that the ion and other particle concentration will decrease in all filtered sample from main sample.
2. The UV results show that the 198 GSM fabric filtered sample with different Nanofibre layer will give better filtered result in comparison to 130 GSM fabrics.
3. In 198GSM &130 GSM nonwoven fabric 2, 3 AND 5 hours Nanofibre spreading will give better results as the time of spreading will increase.
CONCLUSION• The textile wastewater treatment by membrane processes presents some limitations such as
membrane fouling which causes a rapid flux decline. In fact, the membrane processes efficiency can be affected by membrane pore blocking or/and cake formation. In order to limit the effect of membrane fouling caused by plugging particles in textile effluent, a combination between two membrane processes was studied.
• The Use of Pre-treatment is able to reduce the effect of fouling on next filtration process.
• In conclusion, after the analysis of results of determination UV Results we have to say that the particle removal efficiency will go better as the pre treatment of textile waste water if we use the this filter as the pre filter for ultra filtration or Nano filtration. Because the pore size of Nanofibre is generally in the range of 1-2 micron.
• • We know that the main disadvantage of member filtration is fouling and fluxpermiabilty. If we
use this type of membrane is prefilter of nanofilter or ultra filtration the fouling of membrane will automatically decrease because the some partial will automatically removed by prefilter and the rapid flux decline will also decrease.
Acknowledgement• It gives me immense pleasure to express my deep sense of gratitude & whole hearted thanks to
my college authority & DMSRDE authority for giving me opportunity to work on this project.
• I am thankful to Dr. D.B.Shakyawar (Director, U.P.T.T.I) & Dr. Anurag Shrivastava Sc-“G” (Joint Director & Head-Department of Technical Textile, DMSRDE) in this regard.
• I am immense grateful to Dr. J.P.Singh (Project Guide) Dr. K. Mukophadhyaya Sc-“F”- (Head- Department of Nano materials DMSRDE) & Dr. Debmalya Roy Sc-“E”- (Department of
Nano materials DMSRDE) for his valuable guidance, generous advice, critical observations & benevolent approach which all our work & exercise to achieve something worthwhile & satisfactory from a technical point of view.
• I am also like to thank to all DMSRDE Lab Staff & weaving lab staff- UPTTI for their immense support in the lab.
• Last but not the least we also acknowledge the direct indirect effort & support of all the members of UPTTI & DMSRDE for their continuous co-operation during project duration & making this learning experience a truly successful one