Efficient pulse water distribution anaerobic sludge denitrification reaction method and device

Abstract

The invention discloses an efficient pulse water distribution anaerobic sludge denitrification reaction method and device. The device comprises an anaerobic reactor, an aerobic tank and a secondary sedimentation tank, wherein the anaerobic reactor comprises a pulse tank, a reactor body and a bottom uniform water distribution pipe; the pulse tank is arranged at the top of the reactor body and is connected with a water inlet, a nitrification liquid return pipe and a pulse tank water discharge pipe; the pulse tank water discharge pipe extends into the reactor body from the upper part of the reactor body and is connected with a bottom uniform water distribution pipe positioned at the bottom of the reactor body; the anaerobic reactor maintains a high sludge concentration and effective biomass in the reactor body through a refluxed mixed nitrification liquid, so that sludge does not need to be supplemented through sludge refluxing of the secondary sedimentation tank. The device and the method have the advantages of uniform mud-water mixing, low energy consumption, simple daily operation, maintenance and management and high treatment efficiency, and can realize biological denitrification treatment of high-concentration nitrogen-containing organic wastewater.

Description

technical field [0001] The invention relates to a high-efficiency pulse water distribution anaerobic sludge denitrification reaction method and device, belonging to the technical field of sewage water treatment. Background technique [0002] With the continuous development of industry and agriculture, people's quality of life continues to improve, the society pays more and more attention to the water environment where they live, and the requirements for environmental protection are also constantly increasing. In order to implement the two-mountain concept of "green water and green mountains are golden mountains and silver mountains", to protect distant mountains and near water and adapt to stricter sewage discharge standards, it is particularly important to remove pollutants such as nitrogen and phosphorus in sewage. [0003] In sewage treatment, organic nitrogen, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen are often referred to as total nitrogen (TN). Among the...

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Problems solved by technology

[0004] In the above-mentioned traditional A / O process denitrification treatment, in order to improve the denitrification efficiency, after the organic nitrogen is treated with aerobic ammonifying bacteria, it is necessary to mix the decomposed ammoniacal nitrogen, nitrate nitrogen and nitrite nitrogen. The liquid returns from the aerobic treatment section to the anoxic treatment section. The return flow of the nitrification mixed liquor is large, and the dissolved oxygen content in the nitrified mixed liquor is high. For the anoxic treatment section, too high dissolved oxygen will inhibit the denitrification reaction rate, which in turn reduces the denitrification efficiency

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