Structure and method for treating sewage through coupling multi-point water inlet biological membrane with phosphorus adsorption device

Abstract

The invention discloses a structure and a method for treating sewage through coupling a multi-point water inlet biological membrane with a phosphorus absorption device. The method comprises the following steps: enabling sewage to simultaneously enter a primary anoxic area, a secondary anoxic area and a biological membrane area via a water inlet pipe, wherein the water inlet proportion is (3:1)-(1:1); subsequently, enabling the sewage to flow through all stages of anoxic areas and aerobic areas in a bending-flow form through a communicating pipe, performing front pretreatment on the sewage in the primary anoxic area, removing nitrogen by utilizing return sludge, entering the primary aerobic area to remove organic matters and ammonia nitrogen, mixing effluent water from the primary aerobic area and inflow water from the secondary anoxic area, further removing nitrogen in the primary aerobic area, further removing organic matters and ammonia nitrogen in the secondary aerobic area, enabling the treated sewage to enter a sedimentation tank, enabling effluent water from a liquid supernatant on the surface of the sedimentation tank to enter the phosphorus absorption device, discharging from the bottom after absorption, absorbing phosphorus and dissolved and suspended pollutants in the sewage through the phosphorus absorption device and cleaning through a backwashing pump after absorption saturation. The structure and the method disclosed by the invention are particularly suitable for the field of deep nitrogen and phosphorus removal of middle and small town domestic sewage and industrial wastewater.

Description

Technical field [0001] The invention belongs to the field of sewage treatment, and is specifically a structure and method for improving the biological denitrification and dephosphorization treatment of sewage coupled with a multi-point influent biofilm and a phosphorus adsorption device. Background technique [0002] At present, my country’s urban sewage treatment plants have a serious carbon source shortage. The insufficient carbon source not only makes it difficult to meet the TN standard, but also causes problems such as low sludge concentration and easy loosening and swelling. [0003] Beijing local standard level B standard, emission limit is COD <30mg / L, NH4 + -N <2mg / L, TN <15mg / l, TP <1.5mg / l, TSS <8mg / l. The new standard is more stringent than the Class 1 A discharge standard in the "Emission Standards for Pollutants for Urban Sewage Treatment Plants" (GB18918-2002). A single process is far from meeting the needs of the times. The series and coordination of ...

AI Technical Summary

Problems solved by technology

For example, the Chinese patent "Improved device and method for denitrification and dephosphorization of segmented influent depth" (notification number: CN101570382B, announcement date: 2011.7.13) has announced a device and method for improving denitrification and dephosphorization of segmental influent depth, and A / O staged water inflow process is changed to improved UCT staged water inflow process, and denitrification and phosphorus removal bacteria are domesticated to achieve denitrification and phosphorus removal, so as to achieve phosphorus removal. The denitrification and phosphorus removal bacteria domestication period is relatively long, so the start-up time is relatively long; Phosphorus removal and nitrogen removal have contradictions in sludge age, and the two cannot be taken into account at the same time, so the stability of phosphorus removal is poor

[0006] The Chinese patent "A Device for Nitrogen and Phosphorus Removal by MBBR with Water Inlet" (Notice No.: CN202492436U, Announcement Date: 2012.10.17) discloses a device for nitrogen and phosphorus removal for MBBR with water inflow by stages. In order to improve the UCT segmented water intake process and domesticate denitrification phosphorus removal bacteria to achieve denitrification phosphorus removal, thereby achieving phosphorus removal, by adding suspended fillers in the aerobic section and using filter cloth filters, the problems of phosphorus removal and nitrogen removal have been solved. Denitrification phosphorus removal bacteria are used to achieve phosphorus removal, but there are still problems such as relatively long domestication period of denitrification phosphorus removal bacteria and long start-up time

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