Effects of moisture and carbon/nitrogen ratio on gaseous emissions and maturity during direct composting of cornstalks used for filtration of anaerobically digested manure centrate
文献类型： 外文期刊
作者： Xu, Zhicheng 1 ; Li, Guoxue 1 ; Huda, Nazmul 2 ; Zhang, Bangxi 3 ; Wang, Meng 1 ; Luo, Wenhai 1 ;
作者机构： 1.China Agr Univ, Coll Resources & Environm Sci, Beijing Key Lab Farmland Soil Pollut Prevent & Re, Beijing 100193, Peoples R China
2.Macquarie Univ, Sch Engn, Sustainable Energy Syst Engn Grp, Sydney, NSW 2109, Australia
3.Guizhou Acad Agr Sci, Inst Soil & Fertiliser, Guiyang 550006, Guizhou, Peoples R China
关键词： Digested manure centrate; Cornstalk filtration; Composting; Gaseous emission; Microbial community
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： 2020 年 298 卷
页码：
收录情况： SCI
摘要： This study investigated the maturity and gaseous emission during direct composting of cornstalks used as organic media for filtration of anaerobically digested manure centrate. Effects of moisture and carbon/nitrogen (C/N) ratio on composting performance were evaluated. Results show that cornstalks could effectively retain suspended solids and organic matter in digested manure centrate to lower their C/N ratio and attain microbial inoculation. Filtered cornstalks became more compostable when their moisture decreased from 76% to 60% or C/N ratio increased from 12 to 24. Nevertheless, such adjustment aggravated the emission of greenhouse and odours gases during composting. Regardless of composting conditions, the phylum Firmicutes was the most dominant with reduced abundance during composting. Similar reduction also occurred to several abundant phyla, including Atribacteria, Synergistetes and Euryarchaeota. By contrast, the phylum Bacteroidetes, Chloroflexi, Proteobacteria and Actinobacteria enriched as composting progressed. In addition, compost maturity was insignificantly affected by matrix moisture and C/N ratio.
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