A dry fermentation device for treating dewatered sludge

Abstract

The invention belongs to the technical field of dewatering sludge resource recovery and biological energy source development and utilization, and relates to a dry fermentation device for dewatering sludge treatment, in particular to an anaerobic dry fermentation marsh gas production device for dewatering sludge treatment. The device comprises a fermentation tank (1), a leachate recycling and bacterium liquid spraying system, a three-level spiral feeding system (6) and a negative pressure discharging system. Dewatering sludge is fed in a three-level spiral feeding mode, the negative pressure discharging system is adopted at the other end to discharge fermented residues, material exchange is completed, the feeding and discharging difficulty is lowered, and meanwhile the leachate recycling, bacterium liquid spraying, stirring and dry fermentation technology are matched, so that dewatering sludge and bacteria are in sufficient contact, heat and mass transfer are uniform, the factor of created gas is improved, the requirement for water consumption is greatly lowered, no sewage is drained merely, and the resource utilization rate is high.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of dewatered sludge and development and utilization of biological energy, and relates to a dry fermentation device for processing dewatered sludge, in particular to an anaerobic dry fermentation biogas production device for processing dewatered sludge. Background technique [0002] Dewatered sludge is the sludge after flocculation treatment of sewage treatment plant sludge, with a water content of about 80%, which can be used as an available biomass resource. The rapid development of my country's sewage treatment industry produces a large amount of dewatered sludge. However, dewatered sludge has poor hydrophilicity, poor fluidity, is easily corrupted, and is difficult to dispose of. [0003] At present, anaerobic fermentation is an effective method for resource utilization of dewatered sludge, but sludge wet method is generally used for anaerobic fermentation of dewatered sludge. This...

AI Technical Summary

Problems solved by technology

Dry fermentation technology has the advantages of high substrate concentration, high gas production rate, and water saving, but there are also problems such as uneven heat and mass transfer, uneven mixing of inoculum and substrate, and difficulty in controlling the fermentation environment.

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