Flux decline control in nanofiltration of detergent wastewater by a shear-enhanced filtration system

CORC > 过程工程研究所 > 中国科学院过程工程研究所 > 生化工程国家重点实验室

	Flux decline control in nanofiltration of detergent wastewater by a shear-enhanced filtration system
	Luo, Jianquan 1; Ding, Luhui 1; Wan, Yinhua 2; Jaffrin, Michel Y.3
刊名	CHEMICAL ENGINEERING JOURNAL
	2012-02-01
卷号	181 期号:0 页码:397-406
关键词	Nanofiltration Surfactant Shear rate pH Concentration polarization
ISSN号	1385-8947
通讯作者	Ding, LH
英文摘要	Treatment of wastewater containing a cleaning-in-place detergent was investigated by using a rotating disk module equipped with a nanofiltration (NF) membrane. At a rotational speed of 2000 rpm, a pH 7.2 and 25 degrees C. the permeate flux reached a plateau at 350 Lm(-2) h(-1) above 35 bar while rejection of conductivity and COD were respectively 93 and 97%. When a pretreatment by ultrafiltration (UF) was carried out before the NF, the NF flux increased linearly with TMP to reach 450 Lm(-2) h(-1) at 40 bar while COD of NF permeate was a little lower than without pretreatment. Both permeate flux and conductivity rejection increased with increasing pH. High membrane shear rates prevented flux decline with time, as surfactant molecules were dragged away from membrane surface, preventing surfactant aggregates formation. The disk rotational speed necessary for flux stability increased with TMP from 1000 rpm at 10 bar to 2000 rpm at 30 bar. Increasing feed pH had a similar effect by enhancing electrostatic repulsion between surfactant molecules and membrane. Raising the temperature to 45 degrees C increased the permeate flux to over 500 Lm(-2) h(-1) at 30 bar and 2000 rpm. This work confirms the high performance of high shear dynamic filtration in detergent wastewater treatment by NF system both in terms of permeate flux and ion and COD rejections due to reduction in concentration polarization, so that a UF pretreatment was not necessary. (C) 2011 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Environmental ; Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	NONIONIC SURFACTANTS ; NETWORK OPTIMIZATION ; ANIONIC SURFACTANT ; ULTRAFILTRATION ; MEMBRANES ; SEPARATION ; MODULE
收录类别	SCI
语种	英语
WOS记录号	WOS:000301087000044
公开日期	2013-10-24
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/3922]
专题	过程工程研究所_生化工程国家重点实验室
作者单位	1.Univ Technol Compiegne, EA TIMR 4297, F-60205 Compiegne, France 2.Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Beijing 100190, Peoples R China 3.Univ Technol Compiegne, UMR 6600, F-60205 Compiegne, France
推荐引用方式 GB/T 7714	Luo, Jianquan,Ding, Luhui,Wan, Yinhua,et al. Flux decline control in nanofiltration of detergent wastewater by a shear-enhanced filtration system[J]. CHEMICAL ENGINEERING JOURNAL,2012,181(0):397-406.
APA	Luo, Jianquan,Ding, Luhui,Wan, Yinhua,&Jaffrin, Michel Y..(2012).Flux decline control in nanofiltration of detergent wastewater by a shear-enhanced filtration system.CHEMICAL ENGINEERING JOURNAL,181(0),397-406.
MLA	Luo, Jianquan,et al."Flux decline control in nanofiltration of detergent wastewater by a shear-enhanced filtration system".CHEMICAL ENGINEERING JOURNAL 181.0(2012):397-406.