Multi-point water inlet aeration anoxic-aerobic high-efficient nitrogen and phosphorus removal method

Abstract

The invention discloses a multi-point water inlet aeration anoxic-aerobic high-efficient nitrogen and phosphorus removal method. The method sequentially comprises the following steps of: (1) introducing sewage to be treated into a grille regulating tank through a water inlet pipe; (2) dividing the water after pretreatment by the grille regulating tank into two lines, wherein one line leads to an aeration tank and the other line leads to an anoxic tank; (3) sending the water in the anoxic tank into an aerobic tank; (4) dividing nitrified water after nitrification treatment in the aerobic tank into two lines, wherein one line returns to the anoxic tank, and the other line flows into a precipitation tank to perform mud-water separation; and (5) lifting sludge through a sludge lifting device, transporting the residual sludge to the outside through a sludge discharge pipe after passing through a sludge treatment system, and returning the sludge after lifting into the aeration tank. The method disclosed by the invention is suitable for new and transformation upgrading projects of high-ammonia nitrogen village and small town/industrial sewage treatment works, has the advantages of simplicity and convenience in management and maintenance, low cost, good treatment effects, strong nitrogen removal effect and the like, and is less affected by climatic conditions.

Description

technical field [0001] The invention belongs to the technical fields of environmental engineering, water supply and drainage engineering and municipal engineering, and is mainly used for efficient denitrification and dephosphorization treatment of rural and urban domestic sewage and industrial wastewater, and is especially suitable for new projects of high COD, high ammonia nitrogen urban sewage or industrial wastewater , Denitrification upgrading of existing projects. Background technique [0002] In recent years, with the rapid development of urban construction and the continuous improvement of the level of urbanization, the urban residents have increased sharply, the discharge of urban domestic sewage is increasing day by day, and the industries with local characteristics are also booming, resulting in the continuous increase of industrial wastewater. In the vast majority of cities and towns in my country, their finances are not rich, and people’s incomes are generally no...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a multi-point water inflow aeration anoxic aerobic efficient denitrification and dephosphorization method suitable for treating urban sewage and industrial wastewater. nitrogen problem

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