Anaerobic Digesters for Sludge Treatment

Abstract

The invention discloses an anaerobic fermentation tank for sludge treatment. The fermentation tank is a rectangular housing, wherein the housing is internally provided with a sealed rectangular fermenter; a sealed heat transmission groove is formed between the fermenter and the housing; an electric mixing propeller is arranged at the bottom of the fermenter; a secondary feed port and a water-proof breather valve are formed and arranged at the top of the fermenter; and the secondary feed port is formed under a feed port. According to the anaerobic fermentation tank, a sealing system of the original ordinary fermenter is improved; reflux liquid can ensure a higher sealing effect in the fermenter and is matched with the electric mixing propeller for slow mixing to ensure that heat generated by anaerobic fermentation in sludge is uniformly diffused into the reflux liquid; the normal fermentation temperature in the fermenter is ensured; and the working efficiency of the whole device is high.

Description

technical field [0001] The invention relates to the field of recovery and reuse of sludge, and in particular provides an anaerobic fermentation tank for treating sludge with microorganisms. Background technique [0002] With the development of the economy, the amount of sludge produced in production and life is increasing day by day, and the treatment of sludge has become one of the problems that must be solved in the economic development of modern cities and enterprises; The mud is stored in the sludge storage tank for anaerobic fermentation, and the flammable gas generated by anaerobic fermentation is used as the main energy source for the sludge drying after dehydration in the later stage. At the same time, anaerobic fermentation can kill most of the harmful substances in the sludge. Bacteria and viruses are convenient for the next step of sludge treatment. [0003] However, as a mixture of solid and liquid, sludge has the following problems in the anaerobic fermentation...

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Problems solved by technology

[0003] However, as a mixture of solid and liquid, sludge has the following problems in the anaerobic fermentation process: 1. The sealing performance of the fermentation tank itself is poor, and it is not easy for the growth of anaerobic fermentation microorganisms; 2. The sludge accumulates in the fermentation tank During the fermentation process, it is easy to generate a certain amount of heat, which is difficult to dissipate due to the accumulation of sludge. During the long-term fermentation process, the accumulated heat will cause the temperature of the entire sludge system to be high, affecting The normal growth of anaerobic fermentation microorganisms, on the contrary, leads to a decrease in the efficiency of sludge treatment in the overall fermentation tank

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