A method for treating sewage using an integrated biological reaction tank operating in multiple modes

Abstract

The invention discloses a method for treating sewage by using an integrated biological reaction pool operated in multiple modes. The reaction zone includes zone A, zone B and zone C; zone A can be used as an anaerobic zone or anoxic zone during operation, and zones B and C can be used as aerobic zone or anaerobic zone or anoxic zone during operation. The biological selection area is located at the front of the reaction tank, followed by a pre-anoxic area, the water distribution area is located between areas A, B, and C, the outlet area is located between areas B and C, and the inner return channel connects the outlet area and water distribution area. The method for treating sewage with an integrated biological reaction tank using multi-mode operation provided by the present invention has the characteristics of intensification, small footprint, and a small number of equipment, and it can also operate in multiple modes alternately, with free and flexible mode switching, impact load resistance, and In the case of large changes in influent water quality, high-efficiency biological nitrogen and phosphorus removal can be achieved.

Description

technical field [0001] The invention relates to a method for treating sewage, in particular to a method for treating sewage by using an integrated biological reaction tank capable of operating in multiple modes. Background technique [0002] In recent years, sewage treatment has entered the stage of advanced treatment that requires efficient removal of organic matter and efficient nitrogen and phosphorus removal. Efficient biological nitrogen and phosphorus removal technology has become a research hotspot in the field of sewage treatment. When the influent water quality changes greatly, It is more important to ensure efficient biological nitrogen and phosphorus removal. At present, conventional bioreactors either operate in the positive AAO (anaerobic-anoxic-aerobic) mode or the inverted AAO (anoxic-anaerobic-aerobic) mode, or operate in an alternate mode, such as SBR, UNITANK, etc. The process and operation mode are relatively simple. When the influent water quality change...

AI Technical Summary

Problems solved by technology

At present, conventional biological reactors are either operated in the positive AAO (anaerobic-anoxic-aerobic) mode or the inverted AAO (anoxic-anaerobic-aerobic) mode, or in an alternate mode, such as SBR, UNITANK, etc. The process and operation mode are relatively simple. When the influent water quality changes greatly and the stability of the effluent water is required to be high, the above processes limit the development of the sewage treatment industry to a certain extent.

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