High-temperature fermentation equipment for urban organic matter solid waste treatment

Abstract

The invention relates to the technical field of garbage treatment, and discloses high-temperature fermentation equipment for urban organic matter solid waste treatment. The high-temperature fermentation equipment comprises a fermentation tank, a feeding pipe is arranged at the top of the fermentation tank, a rotating shaft is arranged in the middle of the fermentation tank, and a stirring part isarranged on the outer side wall of the rotating shaft. According to the high-temperature fermentation equipment for urban organic matter solid waste treatment, hydrolysis and hydrolysate leading-out are carried out at the same time, wastes with different hydrolysis time are mixed, hydrolysis products of components easy to hydrolyze are discharged immediately, components which are difficult to hydrolyze stay in the fermentation tank for a longer time and do not affect the overall speed; as the hydrolysate is exported immediately, the total content of metabolites of bacteria in the fermentationtank is low, a better growth environment is provided for the growth and propagation of the bacteria, the hydrolysis process of the equipment is kept continuous for a long time, the proportions of a slow growth period and a decay period of bacterial colonies are reduced, and the fermentation efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of garbage treatment, in particular to high-temperature fermentation equipment for urban organic solid waste treatment. Background technique [0002] Municipal solid waste is characterized by a high content of organic matter, with biodegradable substances as high as 70%. Landfill and incineration are generally used to deal with these municipal solid wastes at this stage, which will cause greater environmental pollution and waste of resources. Therefore, combined anaerobic fermentation treatment of municipal organic solid waste came into being. This method uses anaerobic microbial fermentative bacteria to degrade fixed waste into inorganic compounds such as N and P, and gases such as methane and carbon dioxide. [0003] Generally, anaerobic treatment is divided into three stages: hydrolytic fermentation, acidification and methane production. Among them, hydrolytic fermentation is the rate-limiting stage of t...

AI Technical Summary

Problems solved by technology

However, because the current municipal waste classification is not strict, in fact, various organic substances in municipal waste are mixed together and difficult to separate. Although the main components in the waste are identified and sorted by source classification, the waste is still mixed with other types of garbage

Determining the hydrolysis time simply based on the main components is not flexible enough, which reduces the treatment efficiency; on the other hand, for garbage whose main components are easily hydrolyzed and mixed with some difficult-to-hydrolyze components, there will be more unhydrolyzed components in a shorter hydrolysis time. Reduce waste disposal effect

[0004] Secondly, the growth and reproduction of general bacterial populations can be divided into lag phase, logarithmic phase, stable phase, and decline phase, which are discontinuous in the step-by-step garbage treatment process, and will experience a long period of lag after each new fertilizer is added. Second, at the end of the complete fermentation of solid waste, due to the reduction of organic matter content and the accumulation of metabolites, the colony will go through a decline period, and the number of bacteria is relatively small, which further reduces the fermentation efficiency.

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