Intermittent aerated submerged membrane bioreactor using both-direction pump

摘要

The present invention relates to an intermittent aeration wastewater treatment process using a separation membrane. More specifically, a sequencing batch reactor (SBR) capable of biologically removing organic matter and nitrogen by performing several stage reaction tanks in one reactor. Wastewater inflow, bioreaction, sludge sedimentation, treatment water discharge, waste water treatment process discharges treated water by replacing the sludge sedimentation process and treatment water discharge process with a membrane and operating a membrane process Wastewater is continuously introduced into the process, and the biological reaction process that aeration of the reaction tank removes organic matter and discharges the treated water that passes through the membrane, and removes nitrogen in anoxic state during non-aeration. Oxidation-Reduction Potential) is measured and the peak value calculated by second derivative is used. The present invention relates to a system capable of unmanned operation by determining aeration and non-aeration cycles, and to a new backwashing system for reducing contamination of membranes in the use of membrane processes, which is the biggest problem in membrane separation processes. In order to reduce the pressure, two pumps, that is, a suction pump and a backwash pump are generally used, or one pump is used, but a backwash system is constructed using a pipe and a solenoid valve. It is an economical and simplified backwashing system that does not use additional pumps, pipes and valves by driving forward (suction) and reverse (backwashing) with a bi-directional pump. Second derivative of ORP value in intermittent aeration process The control of the forward and reverse direction of the reverse chuck pump in the membrane and membrane process does not use a device such as a computer. By entering the program in the microprocessor (Microprecessor) makes it possible to automatically controlled by the electrical signal coming from the automatic control unit is configured.