A kind of municipal sludge co-processing method

Abstract

The invention relates to a municipal sludge collaborative treatment method; municipal sludge and one or several kinds of urban organic wastes are subjected to cooperative anaerobic digestion, and at the same time of joint anaerobic digestion, the municipal sludge and organic wastes And organic waste can also establish a variety of benign complementarities. For example, co-digestion of municipal sludge and municipal organic waste can dilute the concentration of heavy metals in sludge and the concentration of salt in organic waste, reducing the impact of toxic substances in the anaerobic digestion process. The inhibitory effect of anaerobic microorganisms can reduce the concentration of oil in the digested substrate and reduce the risk of "oil particles" formation; the co-digestion of municipal organic waste and municipal sludge can complement each other's missing nutrients and regulate the content of the digested substrate. The carbon-to-nitrogen ratio is suitable for anaerobic digestion; compared with separate treatment, co-digestion of municipal organic waste and municipal sludge can reduce infrastructure and operating costs, and has better economic benefits.

Description

technical field [0001] The invention relates to the technical field of an environmental protection treatment method for urban organic waste and domestic sludge, in particular to a method for synergistic treatment of municipal sludge. Background technique [0002] With the development of the economy and the improvement of people's living standards, the municipal sewage industry is also facing increasing pressure, the amount of domestic sewage is increasing, and the domestic sludge is increasing. [0003] Traditional municipal sludge treatment methods mainly include incineration, filling, land use, anaerobic digestion and other methods. The cost of using the incineration method is too high and the utilization rate of resources is low; the landfill method has gradually run out of land to fill in today's land shortage; and there are also problems such as poor paths in land use. [0004] A study in the United States in 1989 showed that for a sewage treatment plant of a certain t...

AI Technical Summary

Problems solved by technology

However, compared with other organic wastes, the organic matter content of municipal sludge is low, and anaerobic digestion alone generally has the problems of low carbon-nitrogen ratio and low gas production rate.

Other municipal organic wastes have a high content of organic matter and have a good potential for anaerobic digestion to produce methane. However, acid inhibition and ammonia nitrogen inhibition are prone to occur in the anaerobic digestion process alone, resulting in slow digestion process and even failure of start-up operation.

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