Effect of distillery sewage sludge addition on performance and bacterial community dynamics during distilled grain waste composting

[Display omitted] •Impact of distillery sewage sludge (SS) addition on DGW composting was studied.•SS addition accelerated composting process and improved end-product quality.•SS addition altered the interactions among bacteria and bacteria-external factors.•SS promoted composting process by acceler...

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Bibliographic Details
Published in:Bioresource technology 2022-02, Vol.345, p.126486-126486, Article 126486
Main Authors: Wang, Shi-Peng, Wang, Li, Sun, Zhao-Yong, Wang, Song-Tao, Yuan, Hua-Wei, An, Ming-Zhe, Tang, Yue-Qin, Shen, Cai-Hong, Kida, Kenji
Format: Article
Language:English
Subjects:
Bacterial community
Co-composting
Composting
Distilled grain waste
Distillery sewage sludge
Edible Grain
Maturity
Microbiota
Sewage
Soil
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Summary:[Display omitted] •Impact of distillery sewage sludge (SS) addition on DGW composting was studied.•SS addition accelerated composting process and improved end-product quality.•SS addition altered the interactions among bacteria and bacteria-external factors.•SS promoted composting process by accelerating the microbial succession.•Co-composting enables the effective treatment of distillery solid wastes. This study evaluated the dynamics of physicochemical characteristics and bacterial communities during the co-composting of distilled grain waste (DGW) and distillery sewage sludge (SS), with DGW mono-composting as a control. Results showed that co-composting with SS significantly improved DGW degradation efficiency (61.38% vs. 54.13%) and end-product quality (seed germination index: 129.82% vs. 113.61%; N + P2O5 + K2O: 9.08% vs. 5.28%), compared to DGW mono-composting. Microbial community analysis revealed that co-composting accelerated the bacterial community succession rate and enhanced the abundance of the phyla Proteobacteria, Firmicutes, Chloroflexi, and Deinococcota by 45.86%, 4.38%, 37.49%, and 15.29%, respectively. Network analysis showed that DGW-SS co-composting altered the interactions among the bacterial genera and improved bacterial community stability. Spearman correlation analysis indicated that the correlation between bacterial genera and environmental factors was more significant in DGW-SS co-composting. Therefore, co-composting of DGW and SS is a suitable strategy for the treatment of solid byproducts from spirit distilleries.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2021.126486