Micro-aerobic conditions based on membrane-covered improves the quality of compost products: Insights into fungal community evolution and dissolved organic matter characteristics
[Display omitted] •Micro-aerobic conditions improved compost product quality.•Micro-aerobic conditions were conducive to DOC generation and retention.•Aromatic polymerization was greater under micro-aerobic than static conditions.•Mycothermus dominated the composting process.•The proportion of soil...
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Published in | Bioresource technology Vol. 362; p. 127849 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
01.10.2022
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Subjects | |
Online Access | Get full text |
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Summary: | [Display omitted]
•Micro-aerobic conditions improved compost product quality.•Micro-aerobic conditions were conducive to DOC generation and retention.•Aromatic polymerization was greater under micro-aerobic than static conditions.•Mycothermus dominated the composting process.•The proportion of soil saprotrophs was 5.18% higher after micro-aerobic composting.
This study investigated the effects of micro-aerobic conditions on fungal community succession and dissolved organic matter transformation during dairy manure membrane-covered composting. The results showed that lignocellulose degradation in the micro-aerobic composting group (AC: oxygen concentration < 5 %) was slower than that in the static composting group (SC: oxygen concentration < 1 %), but the dissolved organic carbon in AC was greatly increased. The degree of aromatic polymerization was higher in AC than in SC. But the carboxyl carbon and alcohol/ether biodegradations were faster in SC than in AC, which promoted carbon dioxide and methane emissions, respectively. The relative abundances of pathogenic and dung saprotrophic fungi in AC were 44.6 % and 10.59 % lower than those in SC on day 30, respectively. Moreover, the relative abundance of soil saprotrophs increased by 5.18 % after micro-aerobic composting. Therefore, micro-aerobic conditions improved the quality of compost products by influencing fungal community evolution and dissolved organic matter transformation. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0960-8524 1873-2976 |
DOI: | 10.1016/j.biortech.2022.127849 |