Sludge aerobic composting method by utilizing composting compound microbial inoculum

Abstract

The invention discloses a sludge aerobic composting method by utilizing composting compound microbial inoculum, which relates to a sludge aerobic composting method. The invention solves the problems of poor competitive power, long composting period and great nitrogen loss of the microbial inoculum in the prior sludge aerobic composting method. The method comprises the following steps: 1. carryingout amplification culture on microbial liquid A; 2. carrying out acclimation culture on the compound microbial inoculum A; 3. carrying out amplification culture on microbial liquid B; 4. carrying outacclimation culture on the compound microbial inoculum B; 5. taking dewatered sludge from a sewage plant, and mixing with conditioner; 6. inoculating the compound microbial inoculum, and composting; 7. and covering a layer of compound microbial inoculum B on the surface of the compost, and composting until the compost temperature reaches the ambient temperature, thereby finishing the sludge aerobic composting. The method shortens the time for the compost to reach the high temperature period by 2-3 days, shortens the composting period to 10-15 days, lowers the ammonia volatile amount of the compost by 30-50%, reduces the environmental pollution and enhances the fertilizer efficiency. The invention is applicable to sludge aerobic composting.

Description

technical field [0001] The invention relates to a method for sludge aerobic composting. 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 improvement of urban environment and the development of sewage treatment plants. Traditional composting methods generally use the method of increasing nutrients or improving environmental conditions, and use the indigenous microorganisms in the composting raw materials to degrade organic matter. However, in the early stage of composting, the amount of indigenous microorganisms is small, the reproduction is slow, there are problems such as long fermentation time, odor, and a large loss of nitrogen, resulting in low fertilizer efficiency. Therefore, researchers began to use microbial enhancement technology to inoculate functional bacteria into the pile. [0003] At present, ...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of poor bacterial agent competitiveness, long composting period and large nitrogen loss in the current sludge aerobic composting method, and provides a method for sludge aerobic composting using composting compound bacterial agent