Effect of Jiang-flavor Baijiu distiller's grain addition on humification during distillery sludge composting

IF 6.5 Q2 ENGINEERING, ENVIRONMENTAL

Cleaner Engineering and Technology Pub Date : 2025-05-29 DOI:10.1016/j.clet.2025.101010

Min Yu , Xiaoming Liu , Ruixue Zhang , Xing Zhong , Guangli Zhang , Yuantao Wang , Zengping Ning , Mingfu Meng

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Abstract

Distillery sludge (DSS) composting often faces slow humification and low humification degrees. This study investigated the effects of adding Jiang-flavor Baijiu distillers' grains (JFSDG) on physical and chemical parameters, humus formation, and bacterial communities during DSS composting. The results revealed that the addition of 16 % JFSDG significantly shortened composting duration, reduced phytotoxicity, and increased the germination index by 18 % compared with the control group. JFSDG enhanced humic acid formation, leading to a 65 % increase in final humic acid content. High-throughput sequencing and network analysis revealed that JFSDG addition enriched the abundance of Sphaerobacter and Bacillus, which facilitated microbial interactions. Correlation analysis indicated that temperature, organic matter content, and Bacillus were significantly correlated with increased humus formation. JFSDG addition enhanced humus precursor formation and affected the core microbial community, thereby accelerating the composting process. These findings provide insights into the use of JFSDG to enhance DSS composting and present technical support for its co-disposal.

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江味白酒酒糟对酒池污泥堆肥腐殖质化的影响

酿酒污泥堆肥通常面临腐殖质化缓慢和腐殖质化程度低的问题。研究了江味白酒酒糟对DSS堆肥过程中理化参数、腐殖质形成和细菌群落的影响。结果表明，与对照组相比，添加16%的JFSDG显著缩短了堆肥时间，降低了植物毒性，萌发指数提高了18%。JFSDG促进了腐植酸的形成，最终腐植酸含量增加65%。高通量测序和网络分析显示，JFSDG的加入增加了Sphaerobacter和Bacillus的丰度，促进了微生物的相互作用。相关分析表明，温度、有机质含量和芽孢杆菌与腐殖质形成显著相关。添加JFSDG可促进腐殖质前体形成，影响核心微生物群落，从而加速堆肥过程。这些发现为使用JFSDG加强DSS堆肥提供了见解，并为其共同处置提供了技术支持。

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