Self-circulation efficient biological denitrification device and working method thereof

Abstract

The invention discloses a self-circulation efficient biological denitrification device and a working method thereof. Technical scheme is that a pool body is respectively provided with an aerobic zone,an anoxic zone, a precipitation pool water distribution zone, a sludge zone, a sludge-water separation zone and an effluent steady flow zone from bottom to top; the precipitation pool water distribution zone comprises a precipitation pool water inlet flow-guide cylinder positioned in the center of the pool body; a circular butterfly type jet flow water distributor is arranged between the bottom of the precipitation pool water inlet flow-guide cylinder and the top of the aerobic zone; the precipitation pool water inlet flow-guide cylinder is connected to flow-guide plates distributed in the aerobic zone, the anaerobic zone and the sludge zone; the flow-guide plate is used for three-phase separation and reflux, comprises three sections, and forms a nitrification liquid reflux seam and a sludge reflux seam; and an aerator for providing reflux power is arranged at the bottom of the aerobic zone, is connected to a gas inlet pipe located outside the pool body, achieves nitrification liquidreflux through aerated tail gas pressure, and achieves sludge reflux through negative pressure suction formed by aeration. According to the invention, the device has advantages of reflux pump eliminating, energy saving and the like.

Description

technical field [0001] The invention relates to the fields of environmental protection and sewage treatment. More specifically, it is suitable for the denitrification and dephosphorization of domestic sewage with a low carbon-to-nitrogen ratio, and relates to a self-circulating high-efficiency biological denitrification device and a working method thereof. Background technique [0002] Nitrogen and phosphorus are the main factors that cause eutrophication of water bodies. The mainstream treatment processes such as: A / O process, A 2 / O process, OD series and SBR series, and various biofilm processes and membrane bioreactor processes need to create a suitable dissolved oxygen environment, cultivate dominant microbial flora, design an economical reflux ratio, and achieve biological denitrification denitrification effect. [0003] The denitrification reaction in the prior art generally adopts a combination of a denitrification reactor and a secondary settling tank horizontally ...

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Problems solved by technology

[0005] The above-mentioned scheme still adopts the circulation pump water flow of the existing conventional technology at first, which consumes more energy. In addition, this technology has the following problems: In order to ensure that the sludge in the anaerobic zone and the anoxic zone is in a suspended state, it is necessary to increase the amount of water in the reactor. Rising flow rate, in order to maintain a certain rising flow rat

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