数字农科院2.0

Mature compost promotes biodegradable plastic degradation and reduces greenhouse gas emission during food waste composting

文献类型： 外文期刊

作者： Lingxiao Wang;Ruixue Chang;Zhiping Ren;Xin Meng;Yanming Li;Miao Gao

作者机构：

关键词： Biodegradable plastics;Biodegradation;Composting;Greenhouse gas emissions;Mature compost

期刊名称： Science of the Total Environment

ISSN： 0048-9697

年卷期： 2024 年 926 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Mature compost can promote the transformation of organic matter (OM) and reduce the emission of polluting gases during composting, which provides a viable approach to reduce the environmental impacts of biodegradable plastics (BPs). This study investigated the impact of mature compost on polybutylene adipate terephthalate (PBAT) degradation, greenhouse gas (GHG) emission, and microbial community structure during composting under two treatments with mature compost (MC) and without (CK). Under MC, visible plastic rupture was advanced from day 14 to day 10, and a more pronounced rupture was observed at the end of composting. Compared with CK, the degradation rate of PBAT in MC was increased by 4.44 % during 21 days of composting. Thermobifida, Ureibacillus, and Bacillus, as indicator species under MC treatment, played an important role in PBAT decomposition. Mature compost reduced the total global warming potential (GWP) by 25.91 % via inhibiting the activity of bacteria related to the production of CH4 and N2O. Functional Annotation of Prokaryotic Taxa (FAPROTAX) further revealed that mature compost addition increased relative abundance of bacteria related to multiple carbon (C) cycle functions such as methylotrophy, hydrocarbon degradation and cellulolysis, inhibited nitrite denitrification and denitrification, thus alleviating the emission of GHGs. Overall, mature compost, as an effective additive, exhibits great potential to simultaneously mitigate BP and GHG secondary pollution in co-composting of food waste and PBAT.

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