When Ramon Knutti took over the duties as utilities superintendent at the Town of Wingate, IN he inherited a problem familiar with many small communities.
The lagoon system at the Wingate WWTP was unable to meet its permit limits. High NH3-N levels in the winter and high TSS levels in the summer
were some of the problems he was facing.
The town was offered solutions, such as replacing the lagoon system with a mechanical wastewater treatment plant. The price tag on that option was $2.5 million, a ridiculous cost for a town of 260 people. The new plant would also require more money and time to operate. Ramon’s time was already filled with his other duties of operating the water plant and other town maintenance. So, the town sought other solutions to their lagoon problems.
Enter David Denman with the Indiana Department of Environmental Management, Operators Assistance & Training Section and Jim Bradley, founder of Bradley Environmental. Aqua-Manna, an aquaculture equipment company also founded by Jim, had developed some highly efficient aerators for use in aquaculture. David, Jim and Bill Blythe, Bradley Environmental’s lead biologist, devised a plan to use this new equipment in the Wingate lagoons.
Wingate WWTP is a 3 lagoon aerated lagoon system, which had 16 HP of surface aspirators, two 5 HP in the primary and one 3 HP in both the second and third lagoon. These were replaced by six 1 HP Bradley Environmental Fusion Pumps in the primary and one 1HP Bradley Environmental Fusion Pump in the third lagoon.
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In the second lagoon, six 1 HP Bradley Environmental Biological Reactors were placed. These reactors are mixed bed biological reactors that uses the
efficiencies of the Bradley Environmental Fusion Pump to mix and aerate 25,000 ft2 of media for winter nitrification.
How did it work? In the winter of 2011-2012 Wingate was finally able to stay within their winter ammonia limits. Average winter NH3-N effluent the prior two years was 18.7 mg/l, with the new treatment, 2.5 mg/l, well under their 7.2 mg/l winter limit.
As a bonus, the deep mixing and aeration has also helped to reduce TSS and BOD. Summer of 2011 was the first that Ramon has not had to treat to control algae.
So Wingate and Ramon got their problems solved, but at what cost? Electrical operating costs were reduced by 40%. Algae control costs reduced by
100%. Capital and operating costs for this “drop in” lagoon saving solution are one/tenth the cost a mechanical plant.
If you would like us to fix your lagoon problems and save your town’s budget, Contact Us to arrange a free lagoon evaluation.
Click here to download the Wingate Case Study PDF.