Membrane Bioreactor (MBR)Wastewater Treatment Plant

In

Milk Manufacturing

WAST CY402 – Industrial Wastewater Treatment

Process

Jojo TaguinodSumant Patel

By:

DUMPINGCOMPOUNDINGPROCESSINGMILK STORINGEVAPORATIONDRYING

MILK MANUFACTURING MAJOR PROCESSES

COMPOUNDING:

EVAPORATION:

Drying

Conventional Waste Sources:• Unused Rework powder• Caustic/Acid waste from CIP• High strength wastewater BOD/COD/Nutrients rich

wastewater from raw materials• Oil and grease• Cleaning agents (sterbac, divosan, divoquat, etc.)

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Piping & Instrumentation Diagram

Drum screen

Equalization Tank

DAF

Aeration Tank

MBRPermeate Tank

Centrifuge

Chiller Heat Exchanger

Drum Screen

Domestic and plant wastewater enters the rotating drum screen which filters any incoming trash or serve as grit removal. Drum screened wastewater enters the influent pump station which contains pumps to transfers the wastewater to the equalization tank.

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Equalization Tank

Wastewater is neutralized and equalized in the equalization tank. Sulfuric acid and caustic soda are used to neutralize the pH. Antifoam is also used.AIR STRIPPING:Recirculation pumps together with the equalization blowers are used to efficiently mix and aerate the contents of the equalization tank and keep it aerobic. Anaerobic would produce H2S and gaseous ammonia.

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Coagulation/Flocculation/ Dissolve Air Floatation

Chemical treatment via coagulation and flocculation combined with dissolved air flotation reduces theCOD of the wastewater by roughly 30 to 40%. The DAF float/sludge is transferred to the DAF sludge tank which is further transported via the DAF sludge/solids pumps to the sludge holding tank. Treated DAF effluent is fed to aeration tanks. The DAF serves as a pre-treatment to the MBR.

Chemicals needed: Pacl, polymer Air is the driving force

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Coagulation/Flocculation/ Dissolve Air Floatation

Coagulation/Flocculation/ Dissolve Air Floatation

Before adding chemicals

After adding chemicals

After injecting air

Bioreactor/Aeration Tank

Biological treatment is employed to further treat the wastewater using microorganisms. Chemicals needed include: phosphoric acid, antifoam, caustic

Bioreactor/Aeration Tank

Membrane Bioreactor

The MBR system comes with a cooling package. The chillers together with the heat exchanger regulate the temperature of the bioreactor mixed liquor before feeding to the membrane tanks. Needs antifoam.

Membrane Bioreactor

Hollow fiber membranes which filter the wastewater coming fromthe bioreactors.

Membrane Bioreactor

During permeation During backwash

To permeate tank

From permeate tank

Sludge Holding Tank

The sludge holding receives sludge from WAS (waste activated sludge) from the MBR and sludge from the DAF (dissolved air flotation) floatation and feeds to the decanting centrifuge. SHT needs polymer and antifoam.

Decanting Centrifuge

The centrifuge dewaters DAF float and waste activated sludge from the MBR. It uses centrifugal force to separate the solids efficiently. Needs polymer.

Decanting Centrifuge

After adding chemicals

Before adding chemicals

After centrifuge

Decanting Centrifuge

Key Performance Indicator:

References:

Dissolved air flotation. Retrieved from: http://en.wikipedia.org/wiki/Dissolved_air_flotation

Membrane bioreactor. Retrieved from: http://en.wikipedia.org/wiki/Membrane_bioreactor

Membrane Bioreactor (MBR). Retrieved from: http://www.gewater.com/products/membrane-bioreactor-mbr.html

WPI – Pfizer Global Manufacturing

End…

Thank You!!!