Method for conducting aeration treatment on sewage

Abstract

The invention discloses a method for conducting aeration treatment on sewage. The method is characterized by including the following steps of S01, conducting hydrolysis, wherein microorganisms and enzymes are added to sewage, and large-molecular organic matter in sewage is decomposed into first-stage small-molecular organic matter through the microorganisms by means of the enzymes; S02, conducting fermentation, wherein the first-stage small-molecular organic matter is used by fermentation bacteria in the microorganisms and converted into second-stage small-molecular compound in cells of the fermentation bacteria, the second-stage small-molecular compound includes volatile acid, alcohol, lactic acid, carbon dioxide, hydrogen, ammonia and hydrogen sulfide; S03, further converting volatile acid, alcohol and lactic acid into third-stage small-molecular compound under the effect of the microorganisms, wherein the third-stage small-molecular compound comprises acetic acid. By means of the method, combustible gas produced in the sewage aeration treatment process is used for power generation, the consumption of coal in a power plant is lowered, energy is saved, and air pollution is reduced.

Description

technical field [0001] The invention relates to a method for anaerobic treatment of sewage, which belongs to the technical field of environmental protection. Background technique [0002] During the anaerobic biological treatment of wastewater, the organic matter in the wastewater is finally converted into methane, carbon dioxide, water, hydrogen sulfide and ammonia through the joint action of a large number of microorganisms. During this process, the metabolic processes of different microorganisms interact and restrict each other to form a complex ecosystem, which is intuitively represented as granular sludge in the UASB reaction system. [0003] The main components of the so-called odor produced by anaerobic fermentation are irritating gases such as hydrogen sulfide and ammonia. It is a common practice in China to use a scrubber to deodorize irritating gases. For combustible gases, set Biogas venting ignition device for biogas venting combustion. [0004] The current pap...

AI Technical Summary

Problems solved by technology

Aiming at the problem that the biogas produced by the sewage station or the anaerobic system of the paper mill cannot be recovered safely, the present invention studies how the biogas produced in the anaerobic system can be safely processed on the basis of the existing biogas venting and ignition device while efficiently treating the sewage. Recycling for power generation in power stations