Removal device for excess sludge

Abstract

Abstract PURPOSE:To make the amt. of the sludge to be accumulated in each basin uniform, by determining the deviation value of the flow rate of the return sludge from each basin from the flow rate of the return sludge to be returned with a return sludge pump from the respective basin of a final settling basin and removing the excess sludge in accordance with the results thereof. CONSTITUTION:The activated sludge scraped by a sludge scraper 3 in, for example, four sludge accumulating inlets 2 in a settling basin 1 is returned by a return sludge pump 4 into an aeration tank, and the flow rates of the return sludge removed from the inlets 2 are measured with electromagnetic flowmeters 5 for return sludge. The excess sludge is branched from the removal pipings of the respective sludge accumulating inlets and is removed through electrically driven selector valves 6 provided for each of the basins by means of an excess sludge pump 7. The removal flow rate of the excess sludge in this stage is measured with an electromagnetic flowmeter 8 for the excess sludge. When a removal command is emitted to an excess removal command 9 in such constitution, the command is inputted to a calculator 10.

Inventors

• 👤 Mitsuo Oku
• 👤 奥　満男

Bibliographic Details