Title:
【発明の名称】汚水処理槽内における汚泥濃度の自動調整装置
Document Type and Number:
Japanese Patent JP2515256
Kind Code:
B2
Abstract:
PURPOSE:To maintain specified sludge microorganism in the liquid in a sewage treating tank by withdrawing sludge from the sewage treating chamber and storing the same in a sludge concn. adjusting chamber when the propagation rate of the sludge microorganism in said chamber is high and replenishing the sludge into the sewage treating chamber when the concn. is decreased by self digestion. CONSTITUTION:A pump 4 is installed to a pipeline 3 which is led out of the lower part in the sewage treating tank 1 and the leading-out front end of which is opened into the upper part in the chamber 1 to constitute a circulation circuit 2 for the sludge. A supernatant water overflow path 8 to allow supernatant water to flow over said path into the chamber 1 upon rising of the water level in the sludge concn. adjusting chamber 5 is provided to the upper part of the chamber 5. Said pump is electrically connected in the following manner: A sludge transferring mechanism 6 is operated by the pump 4b when a transmission type optical sensor 1 equipped in the chamber 1 or the circuit 2 decides that the sludge concn. in the chamber 1 is higher than the prescribed concn.; further a sludge returning mechanism 9 is operated by a pump 11 when the sensor decides that the sludge concn. in the chamber 1 is lower than the prescribed concn. As a result, always the specified sludge microorganism are maintained in the liquid in the sewage treating chamber.
Inventors:
MIHASHI KAORU
Application Number:
JP9151487A
Publication Date:
July 10, 1996
Filing Date:
April 13, 1987
Export Citation:
Assignee:
TSURUMI SEISAKUSHO KK
MIHASHI KAORU
MIHASHI KAORU
International Classes:
C02F3/12; (IPC1-7): C02F3/12
Domestic Patent References:
| JP58116098U |