Self-heating sludge ultrahigh-temperature aerobic composting method and device with staged strain temperature control

Abstract

The invention provides a self-heating sludge ultrahigh-temperature aerobic composting method and device with staged strain temperature control. For sludge composting, by inoculating windrow with a compound microbial agent, self-heating ultrahigh-temperature aerobic composting with staged temperature control is achieved. Stages comprise a starting stage, a moderate temperature stage, a high temperature stage, an ultrahigh temperature stage and a compost maturity stage; and the composting device comprises a tank, an automatic temperature and oxygen adjusting device, a bacteria adding device, a stirring device and a condensate water diversion groove. According to the self-heating sludge ultrahigh-temperature aerobic composting method and device with staged strain temperature control, an ultrahigh-temperature aerobic composting system and a staged temperature control composting mode are effectively combined, through heat produced by autophage of strains at the stages, self-heating of the sludge composting system is achieved, not only is an inhibiting effect of indigenous microorganisms of the exogenous microbial agent avoided, but also a good sterilization effect can be conducted on sludge by means of an ultrahigh-temperature condition, sludge moisture can be effectively removed, the residual sludge is deeply reduced, the composting efficiency is improved, a composting cycle is shortened, the problem of land occupation in a sludge composting process can be greatly solved, and the treatment cost is saved.

Description

technical field [0001] The invention relates to the technical field of composting treatment of excess sludge, in particular to a self-heating sludge ultra-high temperature aerobic composting method and an auxiliary composting device for temperature-controlled bacterial strains in stages. Background technique [0002] With the continuous improvement of my country's urbanization level and the rapid development of sewage treatment facilities, the output of surplus sludge has also increased rapidly, and the moisture content of mud cake obtained after sludge dehydration is still about 70%. Composting, as a common means of excess sludge treatment, can control the water content through the metabolic activities of microorganisms to achieve sludge reduction. The excess sludge contains a large amount of unstable organic matter and nutrients, and its organic matter content is as high as 50-70% of the total solid content. At the same time, the excess sludge contains a large number of to...

AI Technical Summary

Problems solved by technology

[0005] Accordingly, it can be seen that the effective combination of ultra-high temperature conditions and inoculation of complex microorganisms has great advantages in the composting of excess sludge, but there are very few related studies

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