The aim of this study was to investigate the impacts of red mud on lignin degradation, humic substance formation and laccase-producing bacterial community in composting to better improve composting performances. The results indicated that the organic matter contents of final compost products in the treatment group with red mud (T) decreased by 25.74%, which was more than the control group without red mud (CK) (12.09%). The final lignin degradation ratio and humic substance concentration of the T were 18.67% and 22.80% higher than that of the CK, respectively. The final C/N values of compost in the CK and T were 11.32 and 10.66, respectively, which were both less than 15, suggesting that compost reached maturity. Redundancy analysis showed that temperature was the main factors driving the variation of laccase-producing bacterial community. Pearson analysis suggested that Pseudomonas, Phenylobacterium, and Caulobacter were the most significantly correlated with lignin degradation and humification in the T.

本研究的目的是研究赤泥对堆肥中木质素降解、腐殖质形成和产生漆酶的细菌群落的影响，以更好地提高堆肥性能。结果表明，赤泥（T）处理组最终堆肥产品有机质含量下降25.74%，高于未赤泥（CK）对照组（12.09%）。T的最终木质素降解率和腐殖质浓度分别比CK高18.67%和22.80%。CK和T堆肥最终C/N值分别为11.32和10.66，均小于15，表明堆肥已成熟。冗余分析表明，温度是驱动漆酶产生菌群落变化的主要因素。假单胞菌属、苯杆菌属和茎杆菌属与木霉中的木质素降解和腐殖化最显着相关。