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Effect of inoculating thermophilic bacterial consortia on compost efficiency and quality

文献类型： 外文期刊

作者： Li, Tuo 1 ; Zhang, Xiangkai 1 ; Wang, Xuanqing 3 ; Yan, Zhangxin 1 ; Peng, Chenglin 4 ; Zhao, Shujun 4 ; Xu, Dabing 4 ; Liu, Dongyang 1 ; Shen, Qirong 1 ;

作者机构： 1.Educ Minist Engn, Jiangsu Collaborat Innovat Ctr Solid Organ Wastes, Jiangsu Prov Key Lab Solid Organ Waste Utilizat, Ctr Resource Saving Fertilizers, Nanjing, Peoples R China

2.Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Peoples R China

3.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing 210014, Peoples R China

4.Hubei Acad Agr Sci, Inst Plant Protect & Soil Fertilizer, Natl Agr Expt Stn Soil Qual, Wuhan 430064, Peoples R China

关键词： Thermophilic bacteria; Consortium; Compost; Bacterial communities; Functional pathways

期刊名称：WASTE MANAGEMENT （ 影响因子：8.1； 五年影响因子：8.7 ）

ISSN： 0956-053X

年卷期： 2023 年 170 卷

页码：

收录情况： SCI

摘要： The objective of this study was to investigate the potential effects of thermophilic bacterial consortia on compost efficiency and quality. The application of bacterial consortia resulted in an earlier onset of the thermophilic period (THP), an increased upper temperature limit, and an extended duration of the THP by 3-5 days compared to the control group (CK). Microbial inoculation significantly improved the efficiency of organic matter degradation, as well as the content of water-soluble nitrogen (WSN) and humic acid-carbon (HAC). In the case of consortium II inoculation (T2), the activities of cellobiohydrolase, beta-glucosidase, and protease were increased by 81.81 %, 70.13 %, and 74.09 % at the THP respectively compared to CK. During the maturation stage, T2 also exhibited the highest PV, n/PIII, n value (1.33) and HAC content (39.53 mg & sdot;g 1), indicating that inoculation of consortium II effectively promoted substrate maturity and product quality. Moreover, this inoculation effectively optimized the bacterial communities, particularly the growth of Planococcus, Chelatococcus, and Chelativorans during the composting, which were involved in carbon and nitrogen conversion or HAC synthesis. Carbohydrate and amino acid metabolism, and membrane transport were predominant in the consortia-inoculated samples, with an increased gene abundance, suggesting that inoculation contributed to promoting the biodegradation of lignocellulose and the exchange of favorable factors. In conclusion, this study demonstrates that inoculating thermophilic bacterial consortia has a positive impact on enhancing the resource utilization efficiency of agricultural waste and improving the quality of compost products.

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