581 Biological waste water treatment Biological waste water treatment For installation in buildings behind the grease separator units ■ Biological treatment of the waste water after the grease separator units ■ For reduction of the low-volatile lipophilic substances, COD and BOD ■ 5 values For stabilization of the pH value ■ Suitable for grease separators NS 2 – 10 ■ Segment construction for simple installation ■ Optionally available with a sediment/filter unit ■ 581 13 K9/1 Process technology Separator Process technology Chapter contents
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581
Biological waste water treatment
Biological waste water treatment
For installation in buildings behind the grease separator units ■
Biological treatment of the waste water after the grease separator units ■
For reduction of the low-volatile lipophilic substances, COD and BOD ■ 5 valuesFor stabilization of the pH value ■
Suitable for grease separators NS 2 – 10 ■
Segment construction for simple installation ■
Optionally available with a sediment/filter unit ■
581
13
K9/1
Process technology
Separator Process technology
Chapter contents
PageBasics 584Planing information 584
Biology Waste water treatment plant
ACO Biojet 586
ACO Biojet-F 588
Filter technology Secondary cleaning stage Sedimentation/filtration unit 590
Separator Process technology Biology/filter technology
PageBasics 584Planing information 584
Biology Waste water treatment plant
ACO Biojet 586
ACO Biojet-F 588
Filter technology Secondary cleaning stage Sedimentation/filtration unit 590
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Pro
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Bio
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Biological waste water treatment
Separator Process technology Biology/filter technology
Section contents
584
Pro
cess
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Bio
log
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Process technologyPlanning references
Separator Process technology Biology/filter technology
Basics
Continued waste water treatment
Special requirements are placed on the further treatment of waste water, since waste water can be made up differently depending on the process technology. the most important aspects, such as process engineering, economics and ecology were included in the design of
the waste water treatment facilities. Only after a sound analysis of the respective local conditions and the exact waste water conditions can be decided, which method represents the best solution for the spe-cific application. ACO offers equipment and process
technologies for this, with which the most diverse tasks in waste water treatment can be solved when applied properly.
Application scope
Oily waste water from commercial ■
kitchens
Overview of the process technology for the continued waste water treatment
Biological waste water treatment
Treatment, waste water polluted with organic with animal and vegetable oils and fats
Sedimentation/filtration unit ■
Standard biology or ■
combination of standard biology and ■
sedimentation/filtration unit
Planning information
Application
The biological waste water treatment is an especially environmentally friendly applica-tion technique. The great organic pollution of waste water with oils and greases from the kitchen sector reequires the use of a grease separator according applicable regulations. The waste water is treated solely by gravity in these separation facili-ties. However, only the clearly separable oils and greases as well as settleable solids are generally retained. Emulsified and dissolved components in the waste water
pass the separator almost unchecked. This inevitably leads to exceeding the limit values at increased demands on the param-eter of lipophilic substances. Since these parameters in many cities (eg Frankfurt) are increasingly in view of the authorities, the focus is on further purification processes after the separator facility.
The limit for the compliance with low-volatile lipophilic substances is permanently met with the standard biology ACO Biojet and/or the ACO sedimentation/filtration unit developed by ACO. Furthermore, the param-eters if COD and BOD 5, the pH value, and the deposable substances are effectively reduced.
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Pro
cess
tec
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Bio
log
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Process technologyPlanning references
Separator Process technology Biology/filter technology
Function description of the ACO sedimentation/filtration unit
The ACO sedimentation/filtration unit con-sists of a filter case and a transfer unit. The pre-treated waste water in the grease separator flows to the filter case in a free fall. A pump arranged in the transfer unit suctions the waste water through the filter cartridge unit after it reaches a certain level into the drain pipe to the sewer. The sedimentation/filtration unit retains the smallest grease particles and suspended solids in the filter case. Air is routinely blown into the interior of the filter car-
tridge between the reduction phase into the sewer. The air cleans the filter surface from the inside out. The residue that ac-cumulated in the filter case is transported in regular intervals into the intake of the grease separator by the pump.
Product advantages
complete system technology of stain- ■
less steel, material grade 316sealed against odours ■
completely automatic operation ■
no additional dosing of fissionable ■
chemicals or or operating equipment is requiredeasiest insertion based on the segment ■
construction method
Function description of standard biology ACO Biojet
The standard biology consists of several biological reactors and a transfer station. The pre-cleaned waste water in the grease separator flows to the bioreactor in a free fall. It is channeled into the lower area of the reactor by a suitably shaped supply channel. From there, the waste water reaches through the special fluidised biol-ogy. The micro-organisms located in this fluidised bed treat the organically polluted waste water. The emulsified and dissolved organic particles are effectively reduced. The waste water now continues to flow into the transfer station. The overflow
edge arranged before the drain maintains the water lever and pulls the waste water rom the surface. This then drains in a free fall into the drain pipe to the sewer. The sedimentable particles still located in the waste water sink to the floor in the transfer station and are channeled into the intake of the standard biology by a pump and again channeled to the reduction proc-ess as active biomass.
Product advantages
complete system technology of stain- ■
less steel, material grade 316sealed against odours ■
completely automatic operation ■
minor subsequent costs for operating ■
equipmenteasiest insertion based on the segment ■
construction method
The following combinations are possible
Version 1: Grease separator according to EN 1825/DIN 4040-100 + sedimentation/filtration unit
Version 2: Grease separator according to EN 1825/DIN 4040-100 + standard biology
Version 3: Grease separator according to EN 1825/DIN 4040-100 +standard biology + sedimentation/filtration unit
Reduction of lipophilic substances
The diagram on the right provides an overview how the parameter of low-volatile lipophilic substances is reduced by using these combinations. The lipophilic substances are thereby com-bined of the following organic parts: