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Ryan Norman (pictured) and Miriam Martens were presenters at the IAMU Water/Wastewater Operator’s Training Workshop in Ankeny, IA on December 7. Norman presented “Sanborn & Iowa Lakes Regional Water Case Study” and Martens spoke on “Wastewater Hydraulic 101”.
DGR worked jointly with the City of Sanborn, Iowa and a large industrial user to evaluate multiple treatment alternatives. Ultimately, the selection of the MBBR was chosen based on cost, operational flexibility and most importantly, limited land availability. Due to the large fluctuations in the industrial loading, a fixed film treatment technology was selected in lieu of activated sludge. Construction of the project started in the beginning of 2019 and was completed in Spring 2020.
In addition to doubling the capacity of the lift station by replacing the existing 7.5HP pumps with 15HP pumps, this project also addressed many deficiencies in the sludge collection, processing, and disposal operations.
First, the existing clarifier mechanism and effluent weir were replaced, and scum collection equipment was added to the existing final clarifier. Additionally, a new sludge processing building was constructed to house a new one-meter belt press and sludge cake conveyer. A sludge cake storage area was also built to allow the City to store the pressed sludge until it could be land applied in the Spring
Assisted the City of Luverne in abandoning the industrial wastewater treatment facility formerly owned by Iowa Beef Producers. The former treatment facility consisted of two anaerobic treatment lagoons, one anaerobic transition pond, two aerobic lagoons, and two stabilization ponds. Closure of the facility included land application of industrial by-products, abandonment of structures and piping, closure of monitoring wells, and documentation of closure activities and restrictive covenants.