A/O reactor capable of achieving reflux without pump

Abstract

The invention discloses an A / O reactor capable of achieving reflux without a pump. The A / O reactor comprises an anoxic tank, an aerobic tank, and a precipitation tank. A micropore aerator is arranged on the bottom of the aerobic tank; the bottoms of the anoxic tank and the aerobic tank are communicated with each other; the bottoms of the aerobic tank and the precipitation tank are communicated with each other; the precipitation tank can be divided into a precipitation buffer area and a precipitation area, the bottoms of the precipitation buffer area and the precipitation area are communicated with each other; an inclined cover plate is arranged on the aerobic tank, the end part of the higher end of the cover plate stretches out the anoxic tank and is provided with an overflow weir slot, and a water discharge weir plate is arranged in the middle of the cover plate. The provide self-circle A / O reactor utilizes the air lifting effect during the aeration process in the aerobic tank to bring the mixed liquid in the aerobic tank back to the anoxic tank so as to achieve the circulation of mixed liquid without a pump. At the same time, the bottoms of the precipitation tank and the aerobic tank are communicated, so that the sludge in the sludge hopper will be sucked into the aerobic tank when the mixed liquid in the aerobic tank is lifted up by the gas during the aeration process, thus the sludge reflux can be achieved without a pump, the energy is saved, and the nitrogen removal efficiency is improved.

Description

technical field [0001] The invention relates to an A / O denitrification device applied to waste water and sewage treatment, in particular to an A / O reaction in which the aerobic mixed liquid pump-free reflux and sludge pump-free reflux are realized by using the air lifting effect during aeration device. Background technique [0002] Anoxic (anaerobic)-aerobic combination is the most widely used wastewater treatment combination, which is manifested in the degradation of organic matter. The heterotrophic bacteria in the anoxic stage hydrolyze suspended pollutants such as starch, fiber, carbohydrates and soluble organic matter in sewage into Organic acid, which decomposes macromolecular organic matter into small molecular organic matter, and converts insoluble organic matter into soluble organic matter. When these anaerobic hydrolyzed products enter the aerobic section for aerobic treatment, the biodegradability and oxygen transfer of sewage can be improved Efficiency; manifest...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defect that the reflux pump requires additional energy consumption in the existing A / O treatment technology, the present invention aims to provide an A / O that utilizes the air lifting effect during aeration to realize the pump-free reflux of the aerobic mixed liquid and the pump-free reflux of the sludge. O reactor

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