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      Insights into the functionality of fungal community during the large scale aerobic co-composting process of swine manure and rice straw.

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          Abstract

          Composting is a cost-efficient method of transferring various unstable and complex organic matters into a stable and humus-like substance, during which various fungus play a critical role in the decomposition of organic matters. In this study, the rice straw and swine manure co-composting were carried out in a pilot-scale, and the evolution of various biochemical parameters and fungi community were detected at different time points. The results showed that most of the parameters fluctuated strongly at the thermophilic phase (THP), and the Canonical Correlation Analysis (CCA) results showed that Mycothermus spp. and Aspergillus spp. were with abundances of 47.82% and 3.51%, respectively, which were considered as the core fungi during the composting process. In addition, five culturable thermophilic filamentous fungi were isolated from the samples obtained at the high temperature stage, among which Aspergillus fumigatus were considered as the core specie at this special phase. The capacity of lignocellulose degradation of this strains was also evaluated by analyzing the secretomes in a coculture group with rice straw and crystalline cellulose as carbon sources, and the identified proteins illustrated that the enzymes were chiefly secreted by A. fumigatus in both treatments, with the abundances of 91.41% and 85.19%, respectively.

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          Author and article information

          Journal
          J Environ Manage
          Journal of environmental management
          Elsevier BV
          1095-8630
          0301-4797
          Sep 15 2020
          : 270
          Affiliations
          [1 ] Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving Fertilizers, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, PR China.
          [2 ] Technology Center, China Tobacco Shanxi Industrial Co., Ltd, Baoji, 721013, PR China.
          [3 ] Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving Fertilizers, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, PR China. Electronic address: liudongyang@njau.edu.cn.
          Article
          S0301-4797(20)30887-2
          10.1016/j.jenvman.2020.110958
          32721362
          399b32ab-8431-4909-978b-3325eab8548f
          Copyright © 2020 Elsevier Ltd. All rights reserved.

          Agricultural wastes,Co-composting,Fungal community,Secretomes,Water soluble fractions (WSF)

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