Commercial system meets residential quality standards

Commercial system meets residential quality standards
Commercial system meets residential quality standards

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Problem: Located between Eau Claire and Chippewa Falls in Wisconsin, Lake Hallie has undergone a development boom in recent years. One area of commercial development recently added a decentralized system called the Midway Mile. The system serves 12 to 15 commercial parcels and other special needs. Within the development, Markquart Motors needed a system to treat its wastewater to meet residential quality standards prior to sending it to the Midway Mile system.

Solution: The installed system consists of four precast concrete tanks in series furnished by Wieser Concrete Products. Each has a capacity of approximately 12,000 gallons. The first tank serves as the settling tank, with two compartments to help separate solids. The second is an equalization tank to prevent surge flows from going into the main system. Inside the tank are duplex pumps that meter forward 150 gallons every half hour. The third tank holds an aerobic treatment system: the Bio-Microbics MicroFAST 9.0 fixed activated sludge treatment system. The final tank is a two-compartment clarification tank with pumps that dose the cleaner effluent out to the Midway Mile system. The tanks were delivered and installed in four hours using a 120-ton crane to meet the customer’s deadline.

Result: The system produces an effluent with less than 30 mg/L of BOD and TSS along with nitrogen reduction. 715/647-2311; www.wieserconcrete.com.



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