This case study is about municipal wastewater treatment. Specifically this wastewater treatment plant accepted grease from grease trap pumpers and attempted to pre treat the fats oils and grease (reduce FOG’s). After pre treatment, the grease would then flow into the main wastewater treatment plant and combine with the rest of the sewage.
While good on paper, at this facility the pre treatment was not working properly. When released into the main treatment facility the FOG’s were causing a number of sewage problems at the treatment plant.
Municipal Wastewater Treatment Case Study
Client Category: Municipal wastewater treatment plant accepting liquid waste (FOG’s) from septic and grease trap pumpers.
Location: Flagstaff, Arizona, U.S.A.
Physical Plant: A 60,000 gallon holding tank was used for pre treatment to reduce the FOG, BOD and TSS before entering the activated sludge treatment plant.
Flow: 1.4 MGD (million gallons per day)
Existing Problems: Two air blowers required to aerate. Manual daily application of competitors enzymes and catalyst required significant time. Accumulating solids in tank. Heating to 85° F. required to keep grease from solidifying.
Objectives: Use a more effective product – F-TREAT. Eliminate the use of one aerator. Reduce teh temperature below 65° F. Reduce overall product costs.
Treatment: The recommended dosage of F-TREAT was administered on a continuing basis using an automatic application system.
Municipal Wastewater Treatment Overall Results
- Reduced FOG, BOD, TSS and sludge within tank.
- Temperature reduced to 63°.
- Eliminated use of one aerator.
- 50% decrease in energy consumption resulted an annual savings of over $20,000.00.
- Reduced product cost. Reduced labor cost.
- NO REDUCTION IN PLANT EFFICIENCY
F-TREAT is a biological wastewater treatment product manufactured by Custom Biologicals. F-TREAT is designed for use in municipal wastewater treatment plants, industrial wastewater treatment plants, lift stations, and rivers an lagoons.