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Effect of thermo-tolerant actinomycetes inoculation on cellulose degradation and the formation of humic substances during composting

文献类型： 外文期刊

作者： Zhao, Yi 1 ; Zhao, Yue 1 ; Zhang, Zhechao 1 ; Wei, Yuquan 1 ; Wang, Huan 1 ; Lu, Qian 1 ; Li, Yanjie 2 ; Wei, Zimin 1 ;

作者机构： 1.Northeast Agr Univ, Coll Life Sci, Harbin 150030, Heilongjiang, Peoples R China

2.Heilongjiang Acad Agr Sci, Heihe Branch, Heihe 164300, Peoples R China

关键词： Composting;Thermo-tolerant actinomycetes;Cellulose degradation;Humic substances;An optimized strategy

期刊名称：WASTE MANAGEMENT （ 影响因子：7.145； 五年影响因子：7.907 ）

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收录情况： SCI

摘要： Graphical abstract Display Omitted Highlights ? Thermo-tolerant actinomycetes were inoculated in different stages of composting. ? Degradation of cellulose and enzymes activities were assessed during composting. ? The structure of actinobacteria community were compared in different treatments. ? The relationship between inoculation and formation of humic substances was analyzed. ? A strategy for increasing content of humic substances and reducing CO2 emission. Abstract The inoculum containing four cellulolytic thermophilic actinomycetes was screened from compost samples, and was inoculated into co-composting during different inoculation phases. The effect of different inoculation phases on cellulose degradation, humic substances formation and the relationship between inoculation and physical–chemical parameters was determined. The results revealed that inoculation at different phases of composting improved cellulase activities, accelerated the degradation of cellulose, increased the content of humic substances and influenced the structure of actinomycetic community, but there were significant differences between different inoculation phases. Redundancy analysis showed that the different inoculation phases had different impacts on the relationship between exogenous actinobacteria and physical–chemical parameters. Therefore, based on the promoting effort of inoculation in thermophilic phase of composting for the formation of humic substances, we suggested an optimized inoculation strategy to increase the content of humic substances, alleviate CO2 emission during composting. ]]>

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