Sludge aerobic composting method

Abstract

The invention discloses a sludge aerobic composting method. The method disclosed by the invention is a method for carrying out sludge aerobic composting by taking afforest wastes (such as branch sections) as a conditioner, and comprises the following steps: (1) mixing sludge and the afforest wastes according to a mass ratio of (2-4):1, specially 3:1, so as to obtain a mixture; and (2) composting the mixture obtained in the step (1) and monitoring the temperature of a pile body in the composting process; in the composting process, turning for one time when the temperature of the pile body is more than 60 DEG C; finishing the composting after a plurality of times of turning and when the temperature of the pile body is reduced to be lower than 30 DEG C and is not raised. According to the sludge aerobic composting method, the high-temperature aerobic composting of organic wastes is used as the basis and the afforest wastes are used as the conditioner to treat the municipal sludge so as to consume a large amount of the afforest wastes while the harmlessness and the reclamation of the sludge are realized, so that the two aims can be realized by one action. Visibly, the sludge aerobic composting method has a wide application prospect.

Description

technical field [0001] The invention relates to a method for sludge aerobic composting. Background technique [0002] With the rapid development of my country's economy, people's requirements for the quality of living environment have increased, the number of sewage treatment plants has gradually increased, and the sludge production has increased dramatically. At the end of 2010, the amount of sludge produced in my country was 22 million tons, and it reached about 30 million tons in 2012, and 80% of it has not been treated. Sludge has the characteristics of high viscosity and high water content. At the same time, it is enriched with pathogenic bacteria, parasite eggs, heavy metals, etc., which makes sludge treatment and utilization difficult. Recycling is the main trend of sludge treatment in the future. Among many resource methods, composting can effectively recover the nutrients in sludge, which is easy for plants to absorb, thereby reducing the use of chemical fertilizer...

AI Technical Summary

Problems solved by technology

With the increase of sludge, the sources of these traditional conditioners are in short supply. At the same time, the traditional conditioners themselves will degrade during the composting process, and the skeleton effect will gradually weaken. Moreover, it is difficult to separate from the decomposed sludge after composting, and the reuse is limited.

Images