Effects of consecutive chemical cleaning on membrane performance and surface properties of microfiltration
| Autor: | Yongcheol Shin, Yang Hun Choi, Ji Hyang Kweon, Hyung Woo Hur, Jaehyun Jung, Seung Ryul Lee |
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| Rok vydání: | 2012 |
| Předmět: |
Chromatography
Chemistry Mechanical Engineering General Chemical Engineering Microfiltration Membrane fouling General Chemistry Pulp and paper industry law.invention Contact angle chemistry.chemical_compound Membrane Flux (metallurgy) law General Materials Science Turbidity Citric acid Filtration Water Science and Technology |
| Zdroj: | Desalination. 286:324-331 |
| ISSN: | 0011-9164 |
| DOI: | 10.1016/j.desal.2011.11.043 |
| Popis: | Chemical cleaning is one of the main strategies to reduce membrane fouling. Effects of consecutive chemical cleaning on microfiltration were investigated with two feed waters; Feed 1 has a low turbidity of 12–55 NTU and Feed 2 has a high turbidity of 343–678 NTU. One cycle of the chemical cleaning was 1st alkaline wash with NaOH and NaOCl, acid wash with citric acid, and 2nd alkaline wash with NaOCl. The cleaning efficiency on flux recovery for experiments with both the two feed waters was decreased with increasing number of filtration cycle with periodic chemical cleaning although the reduced efficiency was substantial with Feed 2. According to membrane surface properties by atomic force microscopic images and roughness and contact angle measurement, the inadequate removal of organic foulant from membrane surface probably aggravated the flux decline with the membrane exposed to several cycles of filtration with the periodic chemical cleaning. |
| Databáze: | OpenAIRE |
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