Reduction of Excess Activated Sludge by Controlling the Motion of Ferrite Particles

Abstract

The motion of ferrite particles controlled by two electromagnets (EMs) with activated sludge in a container can help in reducing excess sludge. We applied this system on the laboratory scale to a miniature waste water treatment plant to evaluate the reduction of excess sludge. One plant was run without any reduction treatment of the sludge. The treated sludge was returned to the aeration tank for biological decomposition. The results showed that no excess sludge was produced in the treatment plant. Thus, a zero-emission waste water treatment plant was achieved by our experiments.