Method for processing sludge by using complex microbial agent

Abstract

The invention relates to a method for processing sludge by using a complex microbial agent. The problems of incompatible aerobic and anaerobic fermentation, long composting period and high moisture content in sludge in the sludge composting method at present are solved by adopting the method. The method comprises the following steps: firstly, adding an auxiliary material to adjust the moisture content of the sludge below 60% before composting the sludge; adding the complex microbial agent to fully stir according to a certain ratio and then pouring into a fermentation tank; completely and thoroughly decomposing the sludge after a high-temperature fermentation stage and a medium and low temperature fermentation stage; reducing the moisture content of the sludge below 30%, so as to finish composting. By adopting the method, composting fermentation of the sludge can be smoothly carried out just by a simple turning process without a high-energy consumption condition such as artificial aeration and the like or a strict and complicated anaerobic condition; the method is low in investment, and significant in sludge reduction effect; loss of nutrients in the composting process can be effectively avoided.

Description

technical field [0001] The invention relates to a method for sludge treatment and disposal, in particular to a method for treating sludge with a compound microbial agent. Background technique [0002] With the increasing amount of urban domestic sewage and industrial wastewater treatment, a large amount of excess sludge has become a secondary pollution source, seriously restricting the development of sewage treatment and the improvement of urban environment. At present, physical landfill or incineration is the most common treatment method for sludge, but the landfill leachate will cause secondary pollution and consume a lot of valuable land resources; while incineration consumes a lot of fuel and pollutes the environment. Therefore, the use of sludge for composting and fermentation into organic fertilizers can not only provide sufficient organic fertilizers for urban landscaping, but also enable sludge treatment and disposal to meet the environmental protection requirements ...

AI Technical Summary

Problems solved by technology

[0003] At present, the sludge composting methods mainly include anaerobic fermentation and aerobic fermentation. Both methods have disadvantages: the organic matter decomposes slowly during anaerobic fermentation, and the fermentation cycle is long, which generally takes several months. The sludge composting treatment site turnover It is slow and inefficient, and requires a lot of land; while aerobic fermentation has high decomposition efficiency of organic matter, short composting cycle, and less odor, but requires continuous oxygen supply and high cost, which is not conducive to popularization

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