A multi-mode operation integrated biological reaction pool for nitrogen and phosphorus removal

Abstract

The invention discloses a multi-mode integrated biological reaction pool for nitrogen and phosphorus removal, the biological reaction pool includes a biological selection area, a pre-anoxic area, a main reaction area, a water distribution area, a water outlet area and an internal return channel; the main reaction The zone includes zone A, zone B and zone C; zone A can be used as an anaerobic zone or anoxic zone during operation, and zone B and zone 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 nitrogen and phosphorus removal integrated bioreactor with multi-mode operation provided by the present invention has the characteristics of intensification, small footprint, and a small number of equipment. It can also operate in multiple modes alternately, with free and flexible mode switching, and impact load resistance. High-efficiency biological nitrogen and phosphorus removal can be achieved when the influent water quality changes greatly.

Description

technical field [0001] The invention relates to a sewage treatment device, in particular to an integrated biological reaction tank capable of multi-mode denitrification and dephosphorization. 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 changes greatly and the st...

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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