Biological pretreatment and co-digestion strategies enhance the methane yield of waste wool

文献类型： 外文期刊

第一作者： Chen, Xiaotian

作者： Chen, Xiaotian;Xie, Yuting;Zang, Changchang;Wang, Weiwei;Tian, Jinxiang;Cui, Zongjun;Yuan, Xufeng;Wen, Boting

作者机构：

关键词： Waste wool; Anaerobic co-digestion; Synergistic effect; Biological pretreatment; Methane yield

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.2； 五年影响因子：13.5 ）

ISSN： 1385-8947

年卷期： 2024 年 502 卷

页码：

收录情况： SCI

摘要： Anaerobic digestion (AD) is a sustainable way to dispose of waste wool (WW) and produce energy, but efficiency is low. In this study, the methanogenesis efficiency of co-digestion was improved by adjusting the mixture ratio of WW and corn straw (CS) and pretreatment measures. The results showed that anaerobic co-digestion could improve the synergistic effect of the substrate. When the proportion of WW was 50 % (CW55), the synergistic effect was the highest (46.78 %). Biological pretreatment increased methane yield (212.35 Nml/g VSadd similar to 223.00 Nml/g VSadd) by 76.94 %-85.81 % compared with CW55. Microbial and PICRUSt2 analysis revealed that pretreatment increased organic acid content, by enriching hydrolytic acidifying bacteria and increasing the abundance of key transaminase. By increasing the abundance of Methanosarcina and MBA03, the symbiotic relationship between microorganisms was strengthened and the methane yield was increased. This study provides a sustainable management measure for WW, which accords with the concept of circular economy.

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