Immersion Microfiltration Membrane-Treatment of High Concentration Organic Wastewater and Nutrients by Activated Sludge Process

摘要

The present invention allows inflow wastewater to pass through a screen and to be used as a carbon source for denitrification by introducing screened water into an anoxic tank formed by providing a baffle to an aeration tank, A microfiltration membrane having a microfiltration rate of 0.05-0.2 .mu.m is introduced into the lower end of the aeration tank immersed in the aeration tank, and then aeration is performed while the membrane washing air is supplied. Then, the treated water in the aeration tank is discharged through a low pressure suction pump And returning the mixed liquor to the anoxic tank again from the aeration tank. The present invention also relates to a method for treating a high concentration organic wastewater. According to the wastewater treatment method of the present invention, it is possible to treat microorganisms in the aeration tank at a high concentration, thereby treating not only organic substances and some refractory substances but also treating nutrients (N, P) through a simple structural change in the aeration tank, It is possible to prevent fouling of the membrane by the air supplied to the waste water treatment system.