首页  |  本刊简介  |  编委会  |  投稿须知  |  订阅与联系  |  微信  |  出版道德声明  |  Ei收录本刊数据  |  封面
投加颗粒活性炭和二氧化锰对剩余污泥厌氧消化的影响
摘要点击 2354  全文点击 718  投稿时间:2019-10-07  修订日期:2019-11-17
查看HTML全文 查看全文  查看/发表评论  下载PDF阅读器
中文关键词  厌氧消化  剩余污泥  颗粒活性炭(GAC)  二氧化锰(MnO2)  微生物菌落  种间电子传递
英文关键词  anaerobic digestion  waste activated sludge  granular activated carbon (GAC)  manganese dioxide (MnO2)  microbial community structure  interspecies electron transfer
作者单位E-mail
杨波 国家环境保护纺织工业污染防治工程技术中心, 上海 201620
东华大学环境科学与工程学院, 上海 201620 
yangbo@dhu.edu.cn 
贾丽娟 国家环境保护纺织工业污染防治工程技术中心, 上海 201620
东华大学环境科学与工程学院, 上海 201620 
 
徐辉 国家环境保护纺织工业污染防治工程技术中心, 上海 201620
东华大学环境科学与工程学院, 上海 201620 
 
李方 国家环境保护纺织工业污染防治工程技术中心, 上海 201620
东华大学环境科学与工程学院, 上海 201620 
 
刘艳彪 国家环境保护纺织工业污染防治工程技术中心, 上海 201620
东华大学环境科学与工程学院, 上海 201620 
 
中文摘要
      厌氧系统添加碳和金属纳米材料是强化厌氧消化的有效策略.为考察投加GAC和MnO2对剩余污泥厌氧消化过程的影响,设置了空白组(R0)、GAC组(R1)、MnO2组(R2)以及GAC/MnO2组(R3)4组间歇实验,研究GAC和MnO2的投加对剩余污泥厌氧消化效率、微生物活性和微生物群落结构的影响.结果表明,反应器运行28 d后,与R0相比,R1和R3的产CH4速率分别提高了68.18%和51.35%,R2的产CH4量降低了21.25%.GAC和MnO2的单独或者混合投加,对厌氧发酵过程均有促进作用.Mn2+与剩余污泥释放的磷酸盐生成磷酸盐沉淀对厌氧代谢通道的阻塞作用,造成R2产CH4效率变低.GAC优良导电性、吸附能力和MnO2/Mn2+的催化作用是R3产CH4效率增强的主要原因.正常代谢条件下,投加GAC、MnO2和GAC/MnO2均可以提高污泥厌氧消化系统微生物活性.微生物群落分析表明,GAC和MnO2促进了产甲烷菌MethanobacteriumMethanosaeta的富集,强化了发酵细菌和产甲烷菌的种间电子传递,促进了剩余污泥厌氧发酵过程和CH4的产生.
英文摘要
      The addition of conductive materials or metal oxide nanoparticles to an anaerobic system is an attractive strategy to enhance anaerobic digestion. The effect of granular activated carbon (GAC) and/or manganese dioxide (MnO2) on waste activated sludge (WAS) anaerobic digestion was investigated by batch experiments. The experiments were provided in control, GAC, MnO2, and GAC/MnO2 groups, which were named R0, R1, R2, and R3, respectively. The sludge characteristics, microbial activity, and microbial community structure were systematically investigated. Results showed that CH4 yield rate was evidently increased by 68.18% and 51.35% in R1 and R3, respectively, whereas the cumulative CH4 production decreased by 21.25% in R2, compared with R0. Moreover, the fermentation process could be promoted with the addition of GAC and/or MnO2. The phosphate precipitation generated by Mn2+ and phosphate released from WAS blocked the anaerobic metabolic channel and then decreased the production of CH4 in R2. The increase in CH4 yield rate in R3 was mainly attributed to the conductivity and adsorption of GAC and the catalysis of MnO2. Additionally, the microbial activity could be promoted with the addition of GAC, MnO2, and GAC/MnO2 in anaerobic digestion. Microbial community structure analysis showed that the abundance of the Methanobacterium and Methanosaeta increased with the addition of GAC and MnO2, which could enhance the interspecies electron transfer between fermenting bacteria and methanogens and boost fermentation and CH4 production.

您是第51741342位访客
主办单位:中国科学院生态环境研究中心 单位地址:北京市海淀区双清路18号
电话:010-62941102 邮编:100085 E-mail: hjkx@rcees.ac.cn
本系统由北京勤云科技发展有限公司设计  京ICP备05002858号-2