A process for the treatment of municipal sludge

By conditioning, hydrolyzing and acidifying, dewatering by pressure filtration, and bio-fermenting with high-temperature bacteria on urban sludge, the moisture content of the fermentation products is reduced, solving the problem of high moisture content in fermentation products in existing technologies, and enabling the direct application of sludge and improving treatment efficiency.

CN122444401APending Publication Date: 2026-07-24HUIZHOU MINHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
HUIZHOU MINHENG ENVIRONMENTAL PROTECTION TECH CO LTD
Filing Date
2026-04-13
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In existing urban sludge treatment technologies, the fermentation products have a high water content, making them unsuitable for direct application in agriculture or construction, thus prolonging the treatment process and affecting treatment efficiency.

Method used

The process involves conditioning, hydrolyzing and acidifying urban sludge, adding sludge conditioner, and dewatering by pressure filtration. Then, it undergoes high-temperature bacterial bio-fermentation, where the high-temperature bacteria evaporate moisture during the fermentation process, reducing the moisture content of the fermentation product to 40%.

Benefits of technology

It enables the drying treatment of urban sludge, and the fermentation products can be directly used as agricultural fillers or building materials, thus improving treatment efficiency.

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Abstract

The application discloses a kind of urban sludge treatment processes, comprising: slurry is carried out to urban sludge;The slurry of urban sludge is hydrolyzed and acidified;Add sludge conditioner in the urban sludge after hydrolysis and acidification, urban sludge is carried out to filter pressing dewatering;Add high temperature bacteria and carry out biological fermentation.After filter pressing, the water content of urban sludge is reduced, and after biological fermentation of high temperature bacteria, the water content of fermentation product is further reduced to about 40% due to water evaporation, so that the biological fermentation process is also used as a drying treatment method for urban sludge, and the fermentation product can be directly applied in agricultural filler or building auxiliary material field, improving the treatment efficiency of urban sludge.
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