Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7068962 | Bioresource Technology | 2018 | 34 Pages |
Abstract
The metabolic function of microbial community dominated organics and nutrients transformation in aerobic composting process. In this study, the metabolic characteristics of bacterial and fungal communities were evaluated in 60â¯days composting of sludge and pumice by using FUNGuild and PICRUSt, respectively. The results showed that microbial community structure and metabolic characteristics were distinctively different at four composting periods. Bacterial genes related to carbohydrate metabolisms decreased during the first 30â¯days, but bacterial sequences associated with oxidative phosphorylation and fatty acids synthesis were enhanced in curing phase. Most of fungal animal pathogen and plant pathogen disappeared after treatment, and the abundance of saprotroph fungi increased from 44.3% to 97.8%. Oxidation reduction potential (ORP) significantly increased from â28 to 175â¯mV through incubation. RDA analysis showed that ORP was a crucial factor on the succession of both bacterial and fungal communities in sludge composting system.
Keywords
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Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
Ke Wang, Hailong Mao, Xiangkun Li,