Biological wastewater treatment device implementing stirring operation by using anaerobic gas

Abstract

The invention relates to a biological wastewater treatment device implementing a stirring operation by using anaerobic gas, which adopts a circulating-closed channel structure, and comprises a water inlet channel, a plug-flow device, an aeration mixing system, an anaerobic gas pressurization device, a mud-water separation device and an anaerobic gas emission device. The biological wastewater treatment device disclosed by the invention is mainly characterized in that a mud-water mixture in the biological wastewater treatment device is stirred by using the reflux of anaerobic gas generated by the metabolism of microbes in the biological wastewater treatment device, so that the settlement of activated sludge is prevented and an anaerobic environment is created, thereby creating a good external environment for biochemical reactions. Because the biological wastewater treatment device adopts a closed channel structure, an anaerobic gas collecting cavity can be formed on a liquid surface, thereby facilitating the collection of anaerobic gas; and the plug-flow device is arranged in the channel, so that the mud-water mixture can be fully circulated, and coming water can be diluted, thereby reducing the impact of loads of the coming water on a microbe system.

Description

technical field [0001] The invention relates to a sewage treatment device, in particular to an anaerobic biological sewage treatment device, which belongs to the field of water treatment. Background technique [0002] With the development of society, the problem of shortage of water resources is becoming more and more serious, and water will become an important factor restricting social development. People are also paying more and more attention to the development and improvement of water treatment technology. [0003] Biological sewage treatment process is called activated sludge process. Activated sludge process can be divided into aerobic method and anaerobic method. Anaerobic biological treatment uses the metabolic characteristics of anaerobic microorganisms to use the reduced organic matter as a hydrogen acceptor without providing external energy, and at the same time produce methane gas with energy value. The anaerobic biological treatment method is not only suitabl...

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Problems solved by technology

However, the suspended matter in the influent water needs to be properly controlled, and should not be too high, generally controlled below 100mg / L; there is a short flow phenomenon in the sludge bed, which affects the processing capacity; it is sensitive to sudden changes in water quality and load, and its impact resistance is slightly poor.

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