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題目:超高溫好氧堆肥技術(shù)的研究 Research on Ultra High Temperature Aerobic Composting Technology
報告人:東北大學(xué) 朱彤 教授
摘要:超高溫好氧堆肥是有機(jī)物降解發(fā)酵過程中產(chǎn)生高溫現(xiàn)象,其發(fā)酵溫度平均超過80度,甚至超過100度,極限情況下超過120度。其中主要原因是超高溫菌(嗜熱菌)在生長時,快速降解有機(jī)質(zhì)而導(dǎo)致的熱量堆積。普通的微生物發(fā)酵過程中,如果溫度超過80度,微生物將會死亡,導(dǎo)致后續(xù)發(fā)酵難以維持。而超高溫嗜熱菌由于其的耐高溫特性則克服了這一缺陷,同時由于發(fā)酵溫度高,有機(jī)物的水分蒸發(fā)加快,高溫菌的快速生長也加快了水分的利用,其結(jié)果是水分的快速去除和有機(jī)物的快速腐熟。通過對市政污泥的發(fā)酵研究,結(jié)果證明污泥的干化周期平均12天,含水率可達(dá)35%,而且具有耐寒冷天氣的能力。
Study on Treatment of Excess Activated Sludge by Ultra-high Temperature Aerobic Composting Technology
Reporter: Zhu Tong Professor, Northeast University
Abstract
Ultra-high temperature aerobic composting refers to the phenomenon that organic matter is degraded to produce a high-temperature environment during fermentation. The average fermentation temperature of ultra-high temperature aerobic composting is more than 80 ºC, even more than 100 ºC, and the limit is more than 120 ºC. The main reason is heat accumulation, caused by the rapid degradation of organic matter by ultra-high temperature bacteria (thermophilic bacteria). In the traditional fermentation process, when the fermentation temperature exceeds 80 ºC, the high-temperature environment kills most microorganisms, which makes the subsequent fermentation difficult to maintain. Thermophilic bacteria overcome this defect due to its high temperature resistance, and the high-temperature environment accelerates the decomposition of organic matter and the evaporation of water. At the same time, the reproduction of thermophilic bacteria also accelerates the utilization of water by microorganisms, resulting in the rapid removal of water and the rapid maturation of organic matter. The experimental result shows that the average fermentation period of sludge is 12 days, the moisture content of the product is less than 35%, and the fermentation can also be carried out normally in winter.