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摘要: 系统总结了有机固体废物好氧堆肥化处理过程的调控手段、堆肥各个阶段的微生物群落演替、堆肥过程中酶活性的变化以及臭气的产生情况。堆肥过程中温度变化对微生物的生长繁殖产生显著影响,微生物群落先由嗜温菌演替至嗜热菌,再由嗜热菌演替至嗜温菌,有机物被逐步降解。各种有机物降解需不同酶参与,主要有芳基硫酸酯酶、脲酶、蛋白酶、葡萄糖激酶、纤维素酶、β-葡萄糖苷酶、过氧化物酶等;微生物发酵过程蛋白质的降解产生NH3,厌氧条件下硫酸盐还原菌与产甲烷菌的生命活动产生H2S,氨基酸脱羧作用、厌氧降解及局部厌氧发酵产生挥发性有机物(VOCs),这些臭味物质均会对环境造成二次污染。可以尝试调控微生物酶系统来提高堆肥效率,并阻断发酵过程中臭气物质的产生。
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