Zhao Shufeng, Guo Hongyu, Klitzsch Norbert, Liu Xiao, Li Guofu, Xu Xiaokai
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China; Henan International Joint Laboratory of Coalmine Ground Control, Henan Polytechnic University, Jiaozuo 454000, China.
Bioresour Technol. 2025 Mar;419:132021. doi: 10.1016/j.biortech.2024.132021. Epub 2024 Dec 26.
Biodegradable plastics (BPs) and lignite, both rich in organic matter, present significant challenges for efficient conversion into clean energy. This study examined the anaerobic co-digestion of BPs and lignite under controlled laboratory conditions. The results demonstrated that the co-digestion of polylactic acid (PLA) and lignite (at a 1:2 mass ratio, with 5 g PLA and 10 g lignite as the model system) rapidly acclimated to the anaerobic environment, enhancing cumulative biogas production by 57 % compared to the mono-digestion of lignite alone. Synergistic fermentation significantly increased the production of organic small molecules while effectively degrading recalcitrant substances, including hydroxyl, aromatic, and methylene groups. Euryarchaeota emerged as the dominant phylum, with its abundance increasing by 118.4 %. Gene abundance for the carbon dioxide-to-methane conversion pathway increased by 60.1 %, confirming it as the primary methane metabolic pathway. These findings provide a novel method for the conversion and utilization of BPs and lignite.
可生物降解塑料（BPs）和褐煤都富含有机物，这给高效转化为清洁能源带来了重大挑战。本研究在可控的实验室条件下考察了BPs与褐煤的厌氧共消化。结果表明，聚乳酸（PLA）与褐煤（质量比为1:2，以5g PLA和10g褐煤作为模型体系）的共消化能快速适应厌氧环境，与单独厌氧消化褐煤相比，累计沼气产量提高了57%。协同发酵显著增加了有机小分子的产量，同时有效降解了包括羟基、芳香基和亚甲基在内的难降解物质。广古菌门成为优势菌门，其丰度增加了118.4%。二氧化碳转化为甲烷的途径的基因丰度增加了60.1%，证实其为主要的甲烷代谢途径。这些发现为BPs和褐煤的转化利用提供了一种新方法。
