KMS of Research Center for Eco-Environmental Sciences， CAS
| Long-term direct ultrafiltration without chemical cleaning for purification of micro-polluted water in rural regions: Feasibility and application prospects | |
Wu, Siqi ; Lu, Chaojie; Ma, Baiwen; Liu, Ruiping; Hu, Chengzhi; Ulbricht, Mathias; Qu, Jiuhui
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| 2022-09-01 | |
| Source Publication | CHEMICAL ENGINEERING JOURNAL
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| ISSN | 1385-8947 |
| Volume | 443Issue:0Pages:136531 |
| Abstract | Water treatment technologies that feature a simple operation, affordable cost, and low chemical addition are necessary to achieve the goal of supplying clean water to rural regions. In this study, an automated-control direct ultrafiltration (UF) process without chemical cleaning was operated and investigated using the micro-polluted surface water at a mountain village in China as feed. During the approximately 2.5-year operation, the UF process operated steady without pretreatment and chemical cleaning, and clean drinking water that met the Chinese drinking water standard (GB 5749-2006) was continuously available. Despite occasional shock loading (84.7 NTU), the turbidity (the major contaminant of feed water) was low (0.3 +/- 0.1 NTU) in the effluent, and the filtration resistance remained at (14.7 +/- 0.7) x 1012 m(-1) except for the initial increase. Compared with organic substances, inorganic substances were dominant constituents of cake layer. Alumina or silica particles were easily removed by frequent backwashing and were distributed on the outer surface (newly formed) of cake layer. In contrast, the bulk cake layer was predominantly composed of CaCO(3 )scales, indicating its major role in membrane fouling. Regarding organic fouling, low-molecular-weight hydrophilic carbohydrate-like compounds, which were related to bacterial activities, were dominant compositions (91.5%). Proteobacteria made a major contribution to bacterial communities (52.2%). Because of the simple process (almost unattended) and no chemical cleaning, the operation and maintenance cost was only 5.3 cents.m(-3) during the entire operation. These findings demonstrate that direct UF without chemical cleaning has significant application potential in rural regions with micro-polluted water. |
| Department | 中国科学院饮用水科学与技术重点实验室 ; 中国科学院饮用水科学与技术重点实验室 |
| Keyword | LOW-PRESSURE MEMBRANES FOULING MECHANISMS ORGANIC-MATTER FOULANTS BACKWASH REMOVAL CALCIUM SPECTRA OXIDE ACIDS |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/47871 |
| Collection | 中国科学院饮用水科学与技术重点实验室 |
| Corresponding Author | Ma, Baiwen |
| Affiliation | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Duisburg Essen, Lehrstuhl Tech Chem 2, D-45117 Essen, Germany 4.Tsinghua Univ, Ctr Water & Ecol, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Cont, Beijing 100084, Peoples R China |
| Recommended Citation GB/T 7714 | Wu, Siqi,Lu, Chaojie,Ma, Baiwen,et al. Long-term direct ultrafiltration without chemical cleaning for purification of micro-polluted water in rural regions: Feasibility and application prospects[J]. CHEMICAL ENGINEERING JOURNAL,2022,443(0):136531. |
| APA | Wu, Siqi.,Lu, Chaojie.,Ma, Baiwen.,Liu, Ruiping.,Hu, Chengzhi.,...&Qu, Jiuhui.(2022).Long-term direct ultrafiltration without chemical cleaning for purification of micro-polluted water in rural regions: Feasibility and application prospects.CHEMICAL ENGINEERING JOURNAL,443(0),136531. |
| MLA | Wu, Siqi,et al."Long-term direct ultrafiltration without chemical cleaning for purification of micro-polluted water in rural regions: Feasibility and application prospects".CHEMICAL ENGINEERING JOURNAL 443.0(2022):136531. |
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| Long-term direct ult（5674KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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