Role of the proportion of cattle manure and biogas residue on the degradation of lignocellulose and humification during composting

•Cattle manure prolonged the duration of the thermophilic phase in composting.•A high cattle manure content promoted the degradation of hemicellulose and lignin.•The addition of cattle manure enhanced the degree of humification in the compost.•Cell viability was positively correlated with the biogas...

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Bibliographic Details
Published in:Bioresource technology 2020-07, Vol.307, p.122941-122941, Article 122941
Main Authors: Bai, Ling, Deng, Yun, Li, Jing, Ji, Mengmeng, Ruan, Wenquan
Format: Article
Language:English
Subjects:
Animals
Biofuels
Biogas residue
Cattle
Cattle manure
Cell viability
Composting
Humic Substances
Humification
Lignin
Lignocellulose
Manure
Soil
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Summary:•Cattle manure prolonged the duration of the thermophilic phase in composting.•A high cattle manure content promoted the degradation of hemicellulose and lignin.•The addition of cattle manure enhanced the degree of humification in the compost.•Cell viability was positively correlated with the biogas residue content.•The addition of 6.7% cattle manure was optimal for biogas residue composting. The effects of different proportions of cattle manure (CM) and biogas residue (BR) on the degradation of lignocellulose and humification during composting were investigated. The results showed that increasing the CM content prolonged the thermophilic period duration, thus promoting organic matter degradation and enhancing the humification degree during composting. Compared with the initial compost, the cellulose content decreased 3.90%–22.81%. The addition of CM increased humic acid content by 17.21%–26.02% compared with the control. The excitation-emission matrix (EEM) fluorescence spectroscopy analysis indicated that a higher CM content was conducive to the formation of protein-like substances, but a disadvantage for humic substances. The cell viability decreased as CM content increased. The redundancy analysis (RDA) demonstrated that proportions of CM and BR were positively correlated with cellulose content and negatively correlated with cell viability and the content of lignin. The results suggest that adding 6.7% CM was optimal for BR composting.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2020.122941