首页  |  本刊简介  |  编委会  |  投稿须知  |  订阅指南  |  联系我们  |  微信  |  出版道德声明  |  Ei收录本刊数据
污泥性质对微波预处理-厌氧消化的影响及古菌群落结构分析
摘要点击 104  全文点击 45  投稿时间:2018-03-21  修订日期:2018-05-02
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  剩余污泥  污泥性质  微波预处理  厌氧消化  古菌群落结构
英文关键词  waste sludge  sludge characteristics  microwave pretreatment  anaerobic digestion  archaeal community structure
作者单位E-mail
房平 西安工程大学环境与化学工程学院, 西安 710048 469493@qq.com 
唐安平 西安工程大学环境与化学工程学院, 西安 710048
中国科学院生态环境研究中心, 北京 100085 
 
付兴民 北京城市排水集团有限责任公司, 北京 100044  
李伟 北京城市排水集团有限责任公司, 北京 100044  
文洋 北京城市排水集团有限责任公司, 北京 100044  
佟娟 中国科学院生态环境研究中心, 北京 100085 hittj@163.com 
魏源送 中国科学院生态环境研究中心, 北京 100085  
中文摘要
      污泥性质对预处理强化厌氧消化工艺的效果有较大影响.本研究对比了某实际污水厂A2O工艺和A2O-MBR工艺产生的剩余污泥在微波预处理-厌氧消化过程中污泥性质的变化与产气效果,并考察了在预处理和厌氧消化过程中污泥的古菌群落结构变化.结果表明,A2O工艺剩余污泥有机质含量比A2O-MBR污泥高出16.4%(分别为66.4%和50.0%),SCOD、溶解性蛋白质和多糖分别为后者1.24、2.02和4.84倍,具有更好的可生物降解性.虽然预处理对生物降解性差的A2O-MBR污泥有机物释放效果更好,但A2O污泥在微波预处理-厌氧消化后产甲烷量比相应处理后的A2O-MBR污泥多26.1%.两种剩余污泥的古菌群落结构差异较大,A2O-MBR污泥中甲烷丝菌属和甲烷八叠球菌属丰度分别比A2O污泥多3.68%和19.73%.预处理对古菌群落的丰富度和均匀度影响相对较小,但厌氧消化后波动较大.污泥中有机组分不同是引起古菌群落结构变化的重要影响因素.
英文摘要
      Sludge characteristics is an important factor in sludge pretreatment and anaerobic digestion (AD) efficiency. Therefore, waste sludge of anaerobic-anoxic-aerobic (A2O) and A2O-membrane bioreactor (MBR) wastewater treatment processes from a full-scale wastewater treatment plant were taken, and the variations of sludge characteristics and performance during microwave pretreatment and AD were compared. The succession of archaeal community structure during the sludge treatment was also investigated. A2O waste sludge showed better biodegradability than A2O-MBR waste sludge did, with 16.4% higher organic matter content (66.4% vs. 50.0%), soluble chemical oxygen demand (COD) (1.24 fold), soluble protein (2.02 fold), and polysaccharides (4.84 fold). Although the efficiency of microwave pretreatment for A2O-MBR waste sludge was better than that for A2O waste sludge, the latter sludge produced 26.1% more methane than the former did. The two types of waste sludge showed different archaeal community structures. The abundances of Methanothrix and Methanosarcina in A2O-MBR waste sludge were 3.68% and 19.73% higher than that in A2O waste sludge. The richness and evenness of archaeal communities slightly changed after pretreatment, but significantly changed after AD. The Chao1 index increased by 54.0%-68.8% after AD, whereas the Pielou index decreased by 16.2%-34.6%. Redundancy analysis showed that the organic components of waste sludge contributed to the succession of archaeal community structure.

您是第13689668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:010-62941102,62849343 传真:010-62849343 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