Threshold flux in concentration mode: Fouling control during clarification of molasses by ultrafiltration | |
Yang, Qiangjian; Luo, Jianquan; Guo, Shiwei; Hang, Xiaofeng; Chen, Xiangrong; Wan, Yinhua | |
刊名 | JOURNAL OF MEMBRANE SCIENCE |
2019-09-15 | |
卷号 | 586页码:130-139 |
关键词 | Molasses Threshold flux Membrane fouling Dopamine coating Surface modification |
ISSN号 | 0376-7388 |
DOI | 10.1016/j.memsci.2019.05.063 |
英文摘要 | Clarification operations are vital to extract high-quality products from cane molasses. Ultrafiltration (UF) is very efficient for this purpose, although membrane fouling limits its large-scale application. In this work, five commercially available polyethersulfone UF membranes were evaluated for the clarification of molasses, whereby 30-100 kDa membranes were found to be the most suitable for this purpose. In order to minimise fouling formation during molasses clarification, the threshold flux concept was for the first time applied to dilution-concentration membrane processes. The threshold flux in concentration mode could be determined by correlating the average transmembrane pressure, average fouling rate, and specific energy consumption with the permeate flux at the same feed. An optimal dilution factor of eight was found based on such threshold flux concept and, only above the threshold flux, higher retentate concentrations and longer concentration times resulted in obvious fouling aggravation. Moreover, polydopamine coating and subsequent polymer (polyethyleneimine, chitosan oligosaccharide, alginate dialdehyde) grafting were used to tune the membrane surface properties to further control the membrane fouling. It was found that membranes modified with positive charges were more prone to molasses fouling, where the effect of the membrane surface properties on fouling was significant only above the threshold flux. However, pore narrowing after surface modification may increase the foulant retention and accumulation on the membrane, thus exerting certain influence on the threshold flux. The threshold flux value for the clarification of molasses with 50 and 100 kDa UF membranes was found to be 27-32 L m(-2) h(-1). The outcome of this work not only provides a guide to study threshold fluxes for industrial fluids at high concentrations, but also clarifies the effect of surface modification on the concentration polarisation/fouling formation during the clarification of cane molasses. |
资助项目 | Guangxi Science and Technology Major Project[AA17204034] ; Key Research Program of Chinese Academy of Sciences[KFZDSW-211-3] |
WOS关键词 | CROSS-FLOW MICROFILTRATION ; MEMBRANE FILTRATION ; WATER TREATMENT ; CONSTANT FLUX ; WASTE-WATER ; TRANSMEMBRANE PRESSURE ; COLOR REMOVAL ; BEHAVIOR ; JUICE ; DECOLORATION |
WOS研究方向 | Engineering ; Polymer Science |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000471097100013 |
资助机构 | Guangxi Science and Technology Major Project ; Key Research Program of Chinese Academy of Sciences |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/29794] |
专题 | 中国科学院过程工程研究所 |
通讯作者 | Luo, Jianquan |
作者单位 | Chinese Acad Sci, Univ Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China |
推荐引用方式 GB/T 7714 | Yang, Qiangjian,Luo, Jianquan,Guo, Shiwei,et al. Threshold flux in concentration mode: Fouling control during clarification of molasses by ultrafiltration[J]. JOURNAL OF MEMBRANE SCIENCE,2019,586:130-139. |
APA | Yang, Qiangjian,Luo, Jianquan,Guo, Shiwei,Hang, Xiaofeng,Chen, Xiangrong,&Wan, Yinhua.(2019).Threshold flux in concentration mode: Fouling control during clarification of molasses by ultrafiltration.JOURNAL OF MEMBRANE SCIENCE,586,130-139. |
MLA | Yang, Qiangjian,et al."Threshold flux in concentration mode: Fouling control during clarification of molasses by ultrafiltration".JOURNAL OF MEMBRANE SCIENCE 586(2019):130-139. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论