Decreased enzyme activities, ammonification rate and ammonifiers contribute to higher nitrogen retention in hyperthermophilic pretreatment composting

文献类型： 外文期刊

第一作者： Huang, Ying

作者： Huang, Ying;Li, Danyang;Yong, Cheng;Sun, Enhui;Jin, Hongmei;Huang, Hongying;Huang, Ying;Li, Danyang;Yong, Cheng;Sun, Enhui;Jin, Hongmei;Huang, Hongying;Wang, Lin

作者机构：

关键词： Hyperthermophilic pretreatment composting (HPC); N retention; Ammonification rate; Enzyme activities; Microbial communities

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

ISSN： 0960-8524

年卷期： 2019 年 272 卷

页码：

收录情况： SCI

摘要： Hyperthermophilic pretreatment composting (HPC) is superior to traditional composting (TC) with shortened maturity period and increased nitrogen (N) retention. However, the mechanism associated with N retention in HPC remains unclear. In this study, we compared the impact of HPC and TC on N retention, and found the proportion of N retained in the final compost was 83.3% and 67.2% for HPC and TC, respectively. Decreased ammonification rate, urease and protease activities together with an elevated temperature were found in HPC. Illumina amplicon sequencing showed that HPC caused a major decline in microbial community richness and diversity in the thermophilic phase. Notably, bacterial (Pseudomonas and Bacillus) and fungal ammonifiers (Acremonium, Alternaria and Penicillium) decreased remarkably in HPC during this phase. Changes in the microbial community could be related to unfavorable modifications of environment from HPC, and which resulted in decreased ammonification and enzyme activities and improved N retention.

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