摘要
采用厌氧膜生物反应器(anaerobic membrane bioreactor,AnMBR)进行剩余污泥与餐厨垃圾的共消化,研究其有机物的去除特性、产气性能和微生物群落组成等运行性能.结果表明,反应器运行过程中有机负荷(organic loading rate,OLR,以VS计)稳定在0.59~0.64 kg·(m^3·d)^-1,挥发性固体(volatile solids,VS)降解率由单消化17.5%上升至共消化40%,COD截留率为95.3%.消化液含固率提高了3.9倍,最终CH4体积分数稳定在60%,CH4产量(以CODadded计)为78.7 mL·g^-1.跨膜压差(transmembrane pressure,TMP)和平均Flux分别维持在-3.1^-2.7 kPa和0.106 L·(m^2·h)^-1,膜污染较轻.16S rRNA微生物多样性分析表明,AnMBR内部厌氧消化细菌主要是Proteobacteria(变形菌门)、Bacteroidetes(拟杆菌门)和Cloacimonetes(阴沟单胞菌门),产甲烷菌中的优势菌科为Methanobacterium(甲烷杆菌科),优势菌属为Methanosaeta(甲烷鬃毛菌属)和Methanolinea(甲烷绳菌属).这将为AnMBR处理污泥及其它高含固率废物流的稳定性和运行性能研究提供有力的理论参考依据,进而为生物质资源化和能源危机提供有效解决途径.
A laboratory-scale anaerobic membrane bioreactor(AnMBR)was used for the co-digestion of sewage sludge and food waste to investigate its organic matter removal characteristics,biogas production performance,and microbial community composition.The results showed that the degradation rate of volatile solids(VS)increased from 17.5%for a single digestion to 40%for the total digestion,and that the COD removal was 95.3%when the organic loading rate(OLR)was stabilized at 0.59-0.64 kg·(m^3·d)^-1.The solids content of the digested sludge increased by a factor of 3.9.The final CH4 content was 60%and the CH4 yield was 78.7 mL·g^-1 of CODadded.The transmembrane pressure(TMP)and average flux were maintained at between-3.1 and-2.7 kPa and 0.106 L·(m^2·h)^-1,respectively,and membrane fouling was not serious.According to an analysis of the microbial diversity using 16 S rRNA,the anaerobic bacterium in the AnMBR were mainly phylum Proteobacteria,Bacteroidetes,and Cloacimonetes,and the dominant methanogens included the Methanobacterium family,Methanosaeta genus,and Methanolinea genus.This study provides a strong theoretical basis for research into the stability and performance of AnMBRs for the co-treatment of sludge and other high-solid waste streams,and provided an effective solution for biomass resource utilization and the energy crisis.
作者
戴金金
牛承鑫
潘阳
陆雪琴
甄广印
郑朝婷
张瑞良
何欣昱
DAI Jin-jin;NIU Cheng-xin;PAN Yang;LU Xue-qin;ZHEN Guang-yin;ZHENG Chao-ting;ZHANG Rui-liang;HE Xin-yu(Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration,School of Ecological and Environmental Sciences,East China Normal University,Shanghai 200241,China;Institute of Eco-Chongming,Shanghai 200062,China;Shanghai Institute of Pollution Control and Ecological Security,Shanghai 200092,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2020年第8期3740-3747,共8页
Environmental Science
基金
国家自然科学基金青年科学基金项目(51808226)
中央高校基本科研业务费专项
上海市“科技创新行动计划”“一带一路”青年科学家交流国际合作项目(17230741100)
上海高校特聘教授(东方学者)计划项目(TP2017041)
上海市扬帆计划项目(19YF1414000)。
