Variations of culturable thermophilic microbe numbers and bacterial communities during the thermophilic phase of composting
Variations of culturable thermophilic microbe numbers and bacterial communities during the thermophilic phase of composting
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DOI：
10.1007/s11274-013-1593-9
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发表时间：
2014-06-01
影响因子：
4.1
通讯作者：
Shen, Qirong
中科院分区：
文献类型：
--
作者：
Li, Rong;Li, Linzhi;Shen, Qirong
堆肥是通过微生物群落在受控条件下降解可生物降解的成分来稳定有机废物的过程。本研究对牛粪高温堆肥过程中可培养细菌的属种多样性、淀粉水解性、蛋白质和纤维素降解能力进行了研究。可培养的嗜热菌和放线菌的数量随着温度的升高而减少。嗜热期开始和结束时，属种多样性和具有降解能力的细菌数量均高于中期。在高温堆肥阶段，优势菌属为芽孢杆菌、地杆菌和尿素杆菌，优势种为热致氮地杆菌。在嗜热后期，土生土杆菌和土壤尿素杆菌占主导地位。芽孢杆菌在初始阶段具有多重降解能力，而尿素杆菌和地质杆菌在后期具有多重降解能力。这些数据将为今后堆肥的控制提供便利。
Composting is a process of stabilizing organic wastes through the degradation of biodegradable components by microbial communities under controlled conditions. In the present study, genera and species diversities, amylohydrolysis, protein and cellulose degradation abilities of culturable bacteria in the thermophilic phase of composting of cattle manure with plant ash and rice bran were investigated. The number of culturable thermophilic bacteria and actinomyces decreased with the increasing temperature. At the initiation and end of the thermophilic phase, genera and specie diversities and number of bacteria possessing degradation abilities were higher than during the middle phase. During the thermophilic composting phase, Bacillus, Geobacillus and Ureibacillus were the dominant genera, and Geobacillus thermodenitrificans was the dominant species. In later thermophilic phases, Geobacillus toebii and Ureibacillus terrenus were dominant. Bacillus, at the initiation, and Ureibacillus and Geobacillus, at the later phase, contributed the multiple degradation abilities. These data will facilitate the control of composting in the future.