Enhanced cross-flow filtration with flat-sheet ceramic membranes by titanium-based coagulation for membrane fouling control |
| |
Authors: | Xiaoman Liu Chang Tian Yanxia Zhao Weiying Xu Dehua Dong Kaimin Shih Tao Yan Wen Song |
| |
Institution: | 1. School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China2. School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China3. School of Material Science and Engineering, University of Jinan, Jinan 250022, China4. Department of Civil Engineering, The University of Hong Kong, Hong Kong 999077, China |
| |
Abstract: | ? Ceramic membrane filtration showed high performance for surface water treatment. ? PTC pre-coagulation could enhance ceramic membrane filtration performance. ? Ceramic membrane fouling was investigated by four varied mathematical models. ? PTC pre-coagulation was high-effective for ceramic membrane fouling control. Application of ceramic membrane (CM) with outstanding characteristics, such as high flux and chemical-resistance, is inevitably restricted by membrane fouling. Coagulation was an economical and effective technology for membrane fouling control. This study investigated the filtration performance of ceramic membrane enhanced by the emerging titanium-based coagulant (polytitanium chloride, PTC). Particular attention was paid to the simulation of ceramic membrane fouling using four widely used mathematical models. Results show that filtration of the PTC-coagulated effluent using flat-sheet ceramic membrane achieved the removal of organic matter up to 78.0%. Permeate flux of ceramic membrane filtration reached 600 L/(m2·h), which was 10-fold higher than that observed with conventional polyaluminum chloride (PAC) case. For PTC, fouling of the ceramic membrane was attributed to the formation of cake layer, whereas for PAC, standard filtration/intermediate filtration (blocking of membrane pores) was also a key fouling mechanism. To sum up, cross-flow filtration with flat-sheet ceramic membranes could be significantly enhanced by titanium-based coagulation to produce both high-quality filtrate and high-permeation flux. |
| |
Keywords: | Ceramic membrane Coagulation Polytitanium chloride Membrane fouling |
|
| 点击此处可从《Frontiers of Environmental Science & Engineering》浏览原始摘要信息 |
| 点击此处可从《Frontiers of Environmental Science & Engineering》下载免费的PDF全文 |
|