High-solid-content anaerobic digestion reaction device and working method thereof

Abstract

The invention relates to a high-solid-content anaerobic digestion reaction device and a working method thereof, and belongs to the field of high-concentration biomass anaerobic digestion. The device comprises a reactor, an anaerobic digestion system, a sample introduction system, a water circulation system, a gas collection system and an on-line monitoring and regulation system, wherein a water storage area is arranged at the bottom of the reactor; the anaerobic digestion system comprises a porous backing plate and a stirring device located above the porous backing plate; the water circulationsystem comprises a water intake and a water inlet; a peristaltic pump is arranged on a water circulation pipeline; the on-line monitoring and regulation system comprises a PLC (programmable logic controller), an on-line monitor and a regulation standby pipeline; and the stirring device, the peristaltic pump and the on-line monitor are connected with the PLC. The device effectively solves the problems of heterogeneity, nonuniform contact between anaerobic microorganisms and substrates, and local VFAs (volatile fatty acids) accumulation, and effectively improves organic waste treatment efficiency and methane productivity by monitoring reaction process indicators and timely regulating an anaerobic digestion process.

Description

technical field [0001] The invention relates to a high-solid anaerobic digestion reaction device and a working method thereof, belonging to the technical field of high-concentration biomass anaerobic digestion. Background technique [0002] Under the situation of rapid social development, various types of organic wastes have caused great harm to human health and the environment. In the context of the depletion of social resources and the shortage of fossil fuels, the energy conversion of organic solid waste resources has become an inevitable development in the future. As an energy recovery technology that can stabilize organic waste such as agricultural and animal husbandry waste, kitchen waste, and urban sludge, anaerobic digestion is gradually receiving attention among the more mature solid waste reduction technologies. [0003] At present, the anaerobic digestion process is divided into wet and dry anaerobic digestion. In the anaerobic digestion process, when the total ...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a high-solids anaerobic digestion reaction device and its working method, which not only has the advantages of traditional dry anaerobic digestion, but also effectively solves the heterogeneity, anaerobic The problem of uneven contact between aerobic microorganisms and substrates and the accumulation of local VFAs. At the same time, by monitoring the basic indicators of the reaction process, the anaerobic digestion process can be regulated in time to effectively improve the treatment efficiency and biogas yield of organic solid waste.

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