High-efficiency denitrification aerobic granular sludge reactor and sewage treatment method

Abstract

A high-efficiency denitrification aerobic granular sludge reactor and a sewage treatment method belong to the technical field of sewage treatment. The high-efficiency denitrification aerobic granular sludge reactor comprises a reactor main body for inoculation of aerobic granular sludge, wherein a water inlet is formed in the bottom of the reactor main body; a liquid level meter is arranged at the top of the reactor main body; a water outlet is formed in the middle of the reactor main body; an aeration device is arranged in the cavity of the reactor main body; a ring-shaped flow guide groove is formed in the bottom of the reactor main body; the aeration device is connected with an air blower; the water inlet is connected with a water inlet pump; the water inlet pump is connected with a sewage distribution reservoir; the high-efficiency denitrification aerobic granular sludge reactor further comprises a controller; the controller is in control connection with the water inlet pump, the air blower and the liquid level meter. The sewage treatment method adopts a sequencing batch operation mode; the operation cycle comprises four stages, namely water intake, aeration, settling and water discharge; water intake, aeration and water discharge are all controlled by the controller automatically. The high-efficiency denitrification aerobic granular sludge reactor and the sewage treatment method have the characteristics of high pollutant removal efficiency, low process cost, small occupied area, low sludge yield, easiness for large-scale application and the like.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to an efficient denitrification aerobic granular sludge reactor and a sewage treatment method. Background technique [0002] In recent years, with the development of urbanization, my country's water pollution has transformed from "organic pollution" represented by COD to "eutrophic pollution" caused by nitrogen pollution. Nitrogen pollution in the water environment is serious, and lake algae outbreaks and coastal "red tides" frequently occur due to excessive nitrogen. The up-to-standard discharge of tail water from treatment plants has become an urgent problem to be solved. The traditional activated sludge process has low removal efficiency of total nitrogen. In order to improve the denitrification effect, an enhanced denitrification process (such as anaerobic-anoxic-aerobic process) has been developed on the basis of the traditional activated sludge process. Reaction...

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Problems solved by technology

At present, the influent concentration and load of most municipal sewage treatment plants in my country are relatively low (influent COD is less than 500mg / L, volumetric load is less than 1.5 kg / COD m 3 d), which restricts the application of the aerobic granular sludge process

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