METHOD FOR CONTROL OF SEWAGE PURIFICATION PROCESS Russian patent published in 1995 - IPC

FIELD: methods for control of sewage biological purification. SUBSTANCE: method for control of sewage purification process consists in that additionally withdrawn successively from balancing reservoir, aerotank and settler is a part of purified sewage in course of biological purification by stabilizing load on activated sludge when changing supply of sewage depending on impurity concentration. This part is cooled and, using thermocompressor, obtained heat is transferred to sewage before its admission to aerotank. To determine value of withdrawn part of sewage, subject to measurement are temperature of sewage at outlet of balancing reservoir, at outlet of settler and after cooling, and power consumed by thermocompressor drive, and flow rate of sewage, and calculation is made by the formula given in invention description. EFFECT: higher efficiency. 1 dwg, 1 tbl