Minimizing mixing energy in activated sludge selector basins Live Webinar | Nov 4, 2016
With the goal to minimize energy consumption in the BNR process, a mixing energy pilot study is under way at MMSD in Milwaukee, WI. Results show that power consumption of only 0.28 W/m3 is sufficient to fully homogenize activated sludge. This record-setting low energy mixing is achieved using a high-efficiency adjustable-thrust submersible mixer with optimum position in a BNR selector zone. The zone dimensions are 48 ft long x 30 ft wide x 15 ft deep. TSS profiles, phosphorous removal and power measurements were studied as mixing energy in the selector basin was gradually reduced over time.