The critical role of feed spacer channel porosity in membrane biofouling: Insights and implications
文献类型：期刊论文
| 作者 | Lin, Weichen; Wang, Qiao; Sun, Lequn; Wang, Dingyi ; Cabrera, Johny; Li, Danyang; Hu, Ligang; Jiang, Guibin; Wang, Xiao-mao; Huang, Xia
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| 刊名 | JOURNAL OF MEMBRANE SCIENCE
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| 出版日期 | 2022-05-05 |
| 卷号 | 649期号:0页码:120395 |
| 关键词 | CROSS-FLOW VELOCITY PRESSURE-DROP INCREASE FILLED CHANNELS BIOMASS ACCUMULATION BRACKISH-WATER IMPACT PERFORMANCE MITIGATION FLUX FILTRATION |
| ISSN号 | 0376-7388 |
| 英文摘要 | Membrane biofouling is a major hindrance limiting the efficiency of spiral wound membrane (SWM) module for water treatment. Feed spacer is an imperative component of SWM module which creates feed channels, determines fluid field and thus influences biofilm development via its geometry. Yet, the role of feed spacer channel porosity in biofilm development remains unclear. In this study, 16 feed spacers of varied geometric parameters and thus different channel porosities were used for both numerical simulations and biofouling experiments. Results showed that the hydraulic and anti-biofouling performances were more sensitive to the variation of filament diameter and spacer thickness. Feed channel porosity as a gross parameter played a pivotal role in biofouling development. The high-porosity (> 0.85) feed spacer channels exhibited a slower increase of feed channel pressure drop when biofouling occurred, but with more biomass accumulated in the middle of spacer meshes because of lower shear stress. For the low-porosity (< 0.75) channels, biofilm incipiently developed from the interspace region between spacer filaments and membrane surface due to block effect, which aggravated narrow channeling and induced a larger area of dead zone, leading to more severe biofouling ultimately. An appropriate channel porosity was suggested at ~0.85 based on the hydraulic and anti-biofouling performances conjointly in this study. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47629]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 作者单位 | 1.Tsinghua Univ, Sch Environm, Res & Applicat Ctr Membrane Technol, Beijing 100084, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China 3.Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lin, Weichen,Wang, Qiao,Sun, Lequn,et al. The critical role of feed spacer channel porosity in membrane biofouling: Insights and implications[J]. JOURNAL OF MEMBRANE SCIENCE,2022,649(0):120395. |
| APA | Lin, Weichen.,Wang, Qiao.,Sun, Lequn.,Wang, Dingyi.,Cabrera, Johny.,...&Huang, Xia.(2022).The critical role of feed spacer channel porosity in membrane biofouling: Insights and implications.JOURNAL OF MEMBRANE SCIENCE,649(0),120395. |
| MLA | Lin, Weichen,et al."The critical role of feed spacer channel porosity in membrane biofouling: Insights and implications".JOURNAL OF MEMBRANE SCIENCE 649.0(2022):120395. |
入库方式： OAI收割
来源：生态环境研究中心
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