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Water Technologies > Product and Service Lines > Davis Process > Case Studies

Davis Process - Case Studies

Read about how USFilter Davis Process solved some of the toughest wastewater treatment and odor control problems.

Results 1 to 5 of 5

Manatee County Solved Age-Old Odor Problems

Odor complaints were overwhelming the staff at the Manatee County, FL, wastewater treatment and collection department south of Tampa. It was also evident that continuing exposure of the sewer system infrastructure to hydrogen sulfide (H2S) gas was causing substantial corrosion.

Multiple Treatment Approach Reduces Odors and Operating Costs in a Collection System

This municipality treats 40-60 million gallons per day of wastewater through its collection system. The city was feeding sodium chlorite into the pump station wet wells to control hydrogen sulfide (H2S) and associated odors. These wet wells operated intermittently, pumping 10-20% of the time into the force main, leaving it untreated most of the time. This single chemical approach did not adequately control odors associated with H2S generated by bacteria in all sections of the collection system. Consequently, supplemental treatments were required at multiple remote sites.

Successful Implementation of an Odor Control Program on a Large Scale

This municipality treats over 100 million gallons per day of municipal and industrial wastewater at several facilities throughout its collection system. Countless complaints were made by local residents about wastewater odors. The city’s collection system was also corroding due to the conversion of hydrogen sulfide to sulfuric acid in the crown area of the pipes. Corrosion also manifested itself in electrical panels, concrete walls, and steel fixtures of pumping stations. The city made a decision to consolidate its treatment programs and single-source all equipment, chemicals, maintenance, and monitoring services for the treatment of its wastewater in an attempt to improve or eliminate the problem.

VX-456 Controls Odors and Reduces Costs Compared to KMnO4 Treatment Program

This municipality was using potassium permanganate (KMnO4) to control malodor in sewage sludge going to their belt press operation. Dry potassium permanganate was fed down pipes attached to the sludge belt press feed lines. Although potassium permanganate adequately controlled the malodor in the sludge, the municipality was interested in evaluating new products which might reduce chemical treatment costs and be easier to handle than potassium permanganate.

VX-456 Controls Odors In Sludge Dewatering Operation and Lowers Costs

An eastern U.S. municipality was using two centrifuges for dewatering 80 to 100,000 gallons-per-day of product from the sludge thickeners. They had routinely treated the sludge for odor control by adding approximately 100 pounds per day (126 mg/L) of potassium permanganate (KMnO4) prior to the two centrifuges.



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