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题目:超高温好氧堆肥技术的研究 Research on Ultra High Temperature Aerobic Composting Technology
报告人:东北大学 朱彤 教授
摘要:超高温好氧堆肥是有机物降解发酵过程中产生高温现象,其发酵温度平均超过80度,甚至超过100度,极限情况下超过120度。其中主要原因是超高温菌(嗜热菌)在生长时,快速降解有机质而导致的热量堆积。普通的微生物发酵过程中,如果温度超过80度,微生物将会死亡,导致后续发酵难以维持。而超高温嗜热菌由于其的耐高温特性则克服了这一缺陷,同时由于发酵温度高,有机物的水分蒸发加快,高温菌的快速生长也加快了水分的利用,其结果是水分的快速去除和有机物的快速腐熟。通过对市政污泥的发酵研究,结果证明污泥的干化周期平均12天,含水率可达35%,而且具有耐寒冷天气的能力。
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.