Continuous insulation strategy of organic waste composting in cold region: Based on cold-adapted consortium. (September 2021)

• Record Type: Journal Article
• Authors: Xie, Xinyu; Wang, Yihan; Wei, Zimin; Zhang, Yutong; Zhang, Chuang; Zhang, Shubo; Yang, Hongyu; Zhang, Xu; Zhao, Yue
• Is Part Of: Bioresource technology. Volume 335(2021)
• Publication Date: 2021-09
• Subjects: Taking-out and fed-batch composting (TFC) -- Organic components -- Low temperature -- Cold-adapted consortium -- Provide heat for residents; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2021.125257
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Biofortification can accelerate the heat generation during composting. A strategy for sustainable heat supplied from composting system. Ensures normal operation of composting at low temperature. Thermal energy is a clean energy source. Abstract: 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.