HEATING OF ANAEROBIC TANK IN SEWAGE TREATMENT APPARATUS AND APPARATUS THEREFOR

• Main Author: IDOGAWA KIYOHIDE
• Format: Patent
• Language: English
• Published: 20.01.1998
• Edition: 6
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PROBLEM TO BE SOLVED: To reduce cost by dispensing with the heater separately provided in an anaerobic decomposition tank by passing an air sending pipe of compressed air performing aeration and air diffusion in an aerobic treatment tank through the water in an anaerobic treatment tank prior to the aerobic treatment tank and heating the water in the anaerobic tank by the radiation of the air sending pipe. SOLUTION: A sewage treatment tank formed of an anaerobic treatment tank 1, an aerobic tank 2 and a sedimentation tank is embeded in the ground and a blower 4 is arranged on the ground. The quantity of heat generated by the heat value of the blower 4 is sent into the air sending pipe 5 as compressed air but the air sending pipe 5 thrusts in the water of the anaerobic treatment tank 1 from the blower 4 to pass along the bottom of the tank and subsequently thrust in the succeeding aerobic treatment tank 2 from the upper part of the anaerobic treatment tank 1 and the air diffusion port of the air sending pipe 5 is positioned on the bottom of the tank and, therefore, the water in the anaerobic treatment tank 1 is heated by the radiation of the air sending pipe 5. In the case of a blower 4 low in heat value, a heating device 8 such as a heater is provided to the place of the air sending pipe 5 protruded from the ground between the blower 4 and the anaerobic treatment tank 1.