A high-efficiency integrated excess sludge anaerobic digester

Abstract

The invention discloses a high-efficiency integrated excess sludge anaerobic digester, which is characterized in that it comprises a casing, the top of which is provided with a cover plate; the lower part of the casing is a reaction module, and the upper part is a gas storage module; the lower part of the reaction module is a sewage The mud area, the upper part is the supernatant liquid area, and the bottom of the sludge area is laid with a mud inlet pipe, and the sludge is connected to the mud inlet pipe through an external mud inlet screw pump; the supernatant liquid area and the sludge area are respectively circulated with the supernatant liquid The sludge circulation pipe and the sludge circulation inlet pipe are connected. After the two are connected in parallel, the sludge circulation outlet pipe is connected through the sludge circulation pump. The sludge circulation outlet pipe is connected with the mud inlet on the top of the cover plate; the air storage module is equipped with a sludge receiving plate. The sludge is anaerobic biologically treated after being reacted in the reaction module, and the generated biogas is stored in the gas storage module and transported to the user through the exhaust port on the top of the cover plate; the digested sludge in the sludge area is output through the sludge discharge screw pump . The invention has the advantages of compact structure, good liquid-solid mass transfer effect, convenient operation and maintenance, strong resistance to organic load impact, and good treatment effect.

Description

technical field [0001] The invention relates to an efficient integrated excess sludge anaerobic digester, which belongs to the technical field of sludge treatment. Background technique [0002] Excess sludge is a by-product produced in the process of sewage treatment, which contains a large number of pathogenic microorganisms, harmful heavy metals and a large number of refractory substances. A large amount of excess sludge is not only a waste of land resources, but also a major public hazard that endangers environmental sanitation. On the other hand, nutrients such as nitrogen and phosphorus contained in sludge can be used as fertilizers, and the generated biogas can be used as energy substances. Therefore, it is one of the problems to be solved urgently in the process of environmental governance to realize the harmlessness, reduction and resource utilization of sludge. [0003] The common treatment methods for excess sludge include landfill, incineration, aerobic compostin...

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Problems solved by technology

[0005] The technical problems to be solved by the present invention are: the existing anaerobic digester, the liquid-solid mass transfer effect is not good, the operation and maintenance are inconvenient, and the organic load impact resistance is poor.

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