Characteristics and formation mechanism of membrane fouling in a full-scale RO wastewater reclamation process: Membrane autopsy and fouling characterization

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 大气污染控制中心

	Characteristics and formation mechanism of membrane fouling in a full-scale RO wastewater reclamation process: Membrane autopsy and fouling characterization
	Zheng, Libing; Yu, Dawei; Wang, Gang; Yue, Zenggang; Zhang, Chun; Wang, Yawei; Zhang, Junya; Wang, Jun; Liang, Guoliang; Wei, Yuansong
刊名	JOURNAL OF MEMBRANE SCIENCE
	2018-10-01
卷号	563 页码:843-856
关键词	Autopsy Membrane fouling RO Bio-fouling Vertical distribution
ISSN号	0376-7388
文献子类	Article
英文摘要	Membrane fouling is the bottleneck of stable operations for reverse osmosis (RO), which is the key technology for reclaimed water reuse in thermal power plants. The foulant composition, formation mechanism, and key contributors were analyzed in this study. The primary scaling substances are Ca, Mg, Al, Fe, and Si, and Ca accounts for 1.49 wt%. Humic substances, proteins, and polysaccharides are the primary organic constitutes, and among them bio-derivatives were main composition revealed by FTIR, EEM, and SEC. Thus, bio-fouling was believed to be the key contributor together with the results of the SEM and the microbial community analysis. The three leading bacteria were alpha-, beta-, gamma-proteobacteria at class levels, 38.11%, 14.19%, and 34.31%, respectively, while starkeya, acidovorax, luteimonas, and pseudoxanthomonas were the leading bacteria at the genus level. Among these bacteria, the one with metabolic processes related to nitrogen fixation and proteolysis showed higher abundance for the high concentrations of nitrogen and protein. Foulants on the endcap and membrane entrance also indicated severe bio-fouling, where Acidovorax presented significant abundance. A Vertical distribution of the microbial community was found in the cross-section of the foulant, in particular, a significant decrease of starkeya (from 48.4% to 4.65%) and acidovorax (from 17.64% to 5.61%) and an increase of pseudoxanthomonas (from 1.04% to 12.89%) from the top layer to the bottom layer were observed. The gamma-proteobacteria was recognized as the pioneering bacteria for its significantly higher abundance in the deeper layer. This study helps to elucidate the RO membrane fouling composition and its key contributors, and improves our understanding of the membrane fouling mechanism and a controlling strategy.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/40800]
专题	生态环境研究中心_大气污染控制中心
推荐引用方式 GB/T 7714	Zheng, Libing,Yu, Dawei,Wang, Gang,et al. Characteristics and formation mechanism of membrane fouling in a full-scale RO wastewater reclamation process: Membrane autopsy and fouling characterization[J]. JOURNAL OF MEMBRANE SCIENCE,2018,563:843-856.
APA	Zheng, Libing.,Yu, Dawei.,Wang, Gang.,Yue, Zenggang.,Zhang, Chun.,...&Wei, Yuansong.(2018).Characteristics and formation mechanism of membrane fouling in a full-scale RO wastewater reclamation process: Membrane autopsy and fouling characterization.JOURNAL OF MEMBRANE SCIENCE,563,843-856.
MLA	Zheng, Libing,et al."Characteristics and formation mechanism of membrane fouling in a full-scale RO wastewater reclamation process: Membrane autopsy and fouling characterization".JOURNAL OF MEMBRANE SCIENCE 563(2018):843-856.