产甲烷
产酸作用
渗滤液
厌氧消化
化学
甲烷
制浆造纸工业
生物量(生态学)
化学需氧量
能量回收
微生物联合体
废物管理
环境化学
污水处理
环境工程
环境科学
细菌
农学
微生物
生物
有机化学
统计
数学
能量(信号处理)
工程类
遗传学
作者
Runfeng Liao,Zi Song,Xinbo Zhang,X. Xiong,Zumin Zhang,Jianning Zhang,Feiyun Sun
标识
DOI:10.1016/j.scitotenv.2024.175161
摘要
Hydrochars were prepared from fruit peels (HC-1) and vegetable waste (HC-2), and combined with fiber spheres, respectively, to form homogeneous biocompatible carriers, which were used for anaerobic moving bed biofilm reactor (AnMBBR) to enhance anaerobic digestion (AD) performance and energy recovery of landfill leachate treatment. Compared with the control AnMBBR with conventional fiber spheres as carriers, the chemical oxygen demand (COD) removal efficiency of the AnMBBR with HC-2 increased from 75 % to 88 %, methane yield increased from 77.7 mL/g-COD to 155.3 mL/g-COD, and achieved greenhouse gases (GHG) emission reductions of 1.74 t CO2 eq/a during long-term operation. HC-2-fiber sphere biocarriers provided more sites for attached-growth biomass (AGBS) and significantly enhanced the abundance of functional microbial community, with the relative abundance of methanogenic bacteria Methanothrix increased from 0.03 % to over 24.4 %. Moreover, the gene abundance of most the key enzymes encoding the hydrolysis, acidogenesis and methanogenesis pathways were up-regulated with the assistance of HC-2. Consequently, hydrochar-assisted AnMBBR were effective to enhance methanogenesis performance, energy recovery and carbon reduction for high-strength landfill leachate treatment.
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