Anaerobic reaction system for sewage and anaerobic treatment method for sewage

Abstract

The invention discloses an anaerobic reaction system for sewage and an anaerobic treatment method for sewage. The anaerobic reaction system comprises a sewage collection pool, an anaerobic reactor and a biogas storage tank which are sequentially connected, wherein a heat recoverer and a heat exchanger are sequentially connected between the sewage collection pool and the anaerobic reactor, a heat exchange tube is arranged in the heat recoverer, the water outlet of the anaerobic reactor is connected with the water inlet of the heat exchange tube, and the water outlet of the heat exchange tube is connected with the next water treatment procedure. The anaerobic reaction system further comprises a heating device, wherein the heating device comprises a boiler, a circulating heat dissipation tube and a temperature control device used for automatically controlling the heating temperature of sewage in the heat exchanger and the anaerobic reactor. The anaerobic reaction system for sewage and the anaerobic treatment method for sewage disclosed by the invention have the advantages that the process flow is simple, the biogas yield is high, the energy consumption is low, and moreover, the anaerobic reaction system for sewage is low in construction cost.

Description

technical field [0001] The invention relates to the technical field of organic wastewater treatment, in particular to a sewage anaerobic reaction system and an anaerobic treatment method thereof. Background technique [0002] Wastewater containing high concentrations of organic matter, such as common human and animal manure, food processing wastewater, straw retting, etc., is mainly treated through biogas engineering. The purpose is to decompose organic matter and generate biogas through anaerobic fermentation, which not only eliminates pollution but also obtains Energy (biogas) and organic fertilizers. However, in the actual operation of the biogas project, due to its inherent defects, it has not played its due role, such as low gas production rate and difficult discharge standards. This is mainly because the anaerobic reaction is sensitive to temperature and temperature changes. Only at a relatively high temperature (38°C) and a small temperature difference range (35-40°C...

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Problems solved by technology

Therefore, in order to increase the biogas production, the scale of the biogas project is made very large, which virtually increases the construction cost and construction time of the biogas project; at the same time, because the anaerobic reaction is greatly affected by the temperature, the efficiency of the anaerobic reaction varies from high to low , the main pollutants in the sewage cannot be effectively degraded, resulting in the discharge is still difficult to meet the standards

[0003] In the prior art, in order to improve the efficiency of the anaerobic reaction, the measures of heating and insulating the sewage have been taken. However, the heating and insulating of the sewage in the prior art requires a large amount of energy consumption, especially when the temperature is low. Even if all the biogas produced by the anaerobic reaction is used to heat the sewage, it cannot meet the demand

Therefore, the actual application value of the biogas project is low

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