UTILIZATION OF GENERATED HEAT OF AERATION TANK PERFORMING NITRIFICATION AND DENITRIFICATION TREATMENT

摘要

PURPOSE: To utilize the generated heat in an aeration tank as the heat source of a heat insulating tank by forming respective pipes supplying and discharging sewage with respect to the jacket of the heat insulating tank to the aeration tank aerating sewage such as excretion while circulating the same to perform nitrification and denitrification treatment. ;CONSTITUTION: A supply pipe 16 sending sewage into the jacket 15 of a heat insulating tank B and a return pipe 17 returning sewage to an aeration tank A from the jacket 15 are to the aeration tank A aerating sewage such as excretion while circulating the same to perform nitrification and denitrification treatment and the generated heat in the aeration tank A is utilized as the heat source of the heat insulating tank B. That is, in the aeration tank A, sewage is successively circulated from a falling passage 4 to a rising passage 5 and from a liquid sump 1 to the falling passage 4 through a circulating pipeline 7 to be subjected to nitrification and denitrification treatment. The heat is generated in the aeration tank A accompanied by this treatment and the temp. of sewage becomes high. Therefore, the heat of the aeration tank A is utilized as the heat energy of the heat insulating tank B accompanied by the circulation of the sewage and the sewage lowered in temp. is returned to the aeration tank A.;COPYRIGHT: (C)1996,JPO