RESEARCH ON RAINWATER DISCHARGE CHAMBER WHICH CAN CONTROL FLOW RATE OF INTERCEPTED SEWAGE DURING HEAVY RAIN

Abstract

 In the rainwater discharge chamber of the combined sewer system, it is difficult to control the flow rate of the intercepted sewage to the sewage treatment plant at the time of heavy rain, and a part of the sewage from the sewage treatment plant is discharged untreated into the sea. To overcome this problem, it is necessary to develop the facility which can control the flow rate in the interceptor sewer. Recently, by authors, a new technology of sewer system has been proposed in which the rainwater discharge chamber has multiple regulation tanks and which has the high performance of controlling the water level in the regulation tanks and flow rate of intercepted sewage into the treatment plant. In the new rainwater discharge chamber with two regulation tanks, the interception error (excessive flow rate of intercepted sewage/planned flow rate of intercepted sewage) becomes 3% to 8%.