Process for producing biological bacterial fertilizer by taking domestic sewage plant dewatered sludge as raw material

Abstract

The invention discloses a process for producing a biological bacterial fertilizer by taking domestic sewage plant dewatered sludge as a raw material. The process comprises the following steps of: mixing town domestic sewage plant dewatered sludge of which the sludge quality is consistent with the Disposal of Sludge from Municipal Wastewater Treatment Plant-Control Standard for Agricultural Use CJ-T309-2009 and the water content is 75-80 percent with a conditioning agent; performing high-temperature aerobic compost fermentation; screening and drying a compost finished product, and inoculating a special microbial strain; and pelletizing to obtain the biological bacterial fertilizer. The biological bacterial fertilizer produced with the process can be used for supplying a plenty of organic nutrients to crops, the nutrition absorption rates and disease resisting capabilities of crops are raised, remarkable yield increase of crops is realized, and the problem of sludge treatment of a large quantity of town domestic sewage plants is solved simultaneously.

Description

technical field [0001] The invention relates to a biological bacterial fertilizer production process, in particular to a biological bacterial fertilizer production process using dewatered sludge from a domestic sewage plant as a raw material. Background technique [0002] At present, there are 1,992 urban sewage treatment plants in operation across the country, treating 28 billion cubic meters of sewage, and producing 30 million tons of dewatered sludge with a moisture content of about 80% annually, most of which have not been stabilized, harmless, and resource-efficient. It will not only become a burden on the city and the sewage treatment plant, but also the arbitrary discharge and stacking of sludge will cause new pollution to the surrounding environment. At present, the disposal methods of municipal sludge include incineration, sanitary landfill and land utilization, among which land utilization has become an important disposal method. [0003] Biological fertilizer is ...

AI Technical Summary

Problems solved by technology

[0002] At present, there are 1,992 urban sewage treatment plants in operation across the country, treating 28 billion cubic meters of sewage, and producing 30 million tons of dewatered sludge with a moisture content of about 80% annually, most of which have not been stabilized, harmless, and resource-efficient. There is no normal way out, which not only becomes a burden on the city and the sewage treatment plant, but also the arbitrary discharge and stacking of sludge will cause new pollution to the surrounding environment