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Case Study

Wastewater Treatment Plant

Odor & Solids Reduction

Problem

A wastewater treatment plant in Southeast Georgia located on a resort island has a 3 million gallons per day flow. The plant was experiencing major odor problems at the head of the plant, as well as poor digestion and settling of bio-solids in the sequencing batch reactors (SBR’s) and aerobic digesters. The odors were primarily hydrogen sulfide and were the source of numerous complaints from the residents in the vicinity of the plant. The plant was hauling and disposing an average of 125 to 150 tons of bio-solids per month incurring hauling and disposal charges.

Solution

An Organic Product was added to the influent of the wastewater stream approximately 100 yards before the head of the plant. The product was added at a rate of 3-4 PPM of the daily flow of 3 million gallons. Odors were immediately reduced at the head of the plant. Within 2 days the plant began to see a significant reduction in solids in the SBR’s and digesters.

The plant was treated for 30 days at a rate of 3-4 PPM and added 2.5 gallons of product directly into the digesters each day.

Conclusion

During the first month of treatment the odors generated at the head of the plant were dramatically reduced. No odor complaints from the residents were received during the first month of application. The total wasted solids for the first 30-day period were reduced from an average of 125-150 tons to 2 tons, a 98% reduction. The plant saved in hauling and disposal expense. The improvement in overall plant operation also allowed for fewer man hours needed to run the plant.