Continuous insulation strategy of organic waste composting in cold region: Based on cold-adapted consortium.

Xinyu Xie, Yihan Wang, Zimin Wei, Yutong Zhang, Chuang Zhang, Shubo Zhang, Hongyu Yang, Xu Zhang, Yue Zhao

Bioresource technology 2021 Sep

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Compost is a self-heating process for organic waste. Microbes are the main executors in composting process. However, due to low temperature in winter and low efficiency of composting, a lot of heat is lost in composting. In this study, taking-out and feed-batch composting method (TFC) can supplement nutrition and improve composting microenvironment. Compared with NC, the amount of carbohydrates, protein and fat decomposed by TFC increase by 56.8%, 237% and 122%, respectively, in the composting start-up period (0-100 h). Structure and function of microbial community have changed due to stimulation of cold-adapted consortium. In addition, this study shows that core bacteria stimulate cooperation among different bacteria in the organic components metabolism networks. Finally, based on the important role of cold-adapted consortium, the sustainable heating strategy of composting system is put forward, which converts organic wastes into released heat for daily heating and hot water preparation, leading role of cold-adapted consortium. Copyright © 2021 Elsevier Ltd. All rights reserved.

Citation

Xinyu Xie, Yihan Wang, Zimin Wei, Yutong Zhang, Chuang Zhang, Shubo Zhang, Hongyu Yang, Xu Zhang, Yue Zhao. Continuous insulation strategy of organic waste composting in cold region: Based on cold-adapted consortium. Bioresource technology. 2021 Sep;335:125257