Effect of fouling reduction by ozone backwashing in a microfiltration system with advanced new membrane material |
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| Affiliation: | 1. Department of Civil Engineering, Kangnung National University, Gangneung Daehangno 120, Gangneung, Gangwon-do 210-702, South Korea;2. Department of Civil and Environmental Engineering, Sungkyunkwan University, Chunchun-dong 300, Suwon, Kyonggi-do 440-746, South Korea;3. R&D Center, Samsung Engineering Co., Ltd, SEI Tower 467-14, Dogok-dong, Gangnam-gu, Seoul, South Korea;1. State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, PR China;2. Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong, PR China;3. Division of Environmental Engineering, Hokkaido University, N13W8, Kita-ku, Sapporo 060-8628, Japan;1. Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA;2. Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, MA;1. Helmholtz-Zentrum Geesthacht, Max-Planck Straße 1, 21502 Geestacht, Germany;2. Fakultät Physik/DELTA, 44221 Dortmund, Germany;3. Fakultät Chemie, Physikalische Chemie II, Otto-Hahn-Straße 6, 44227 Dortmund, Germany;4. Deutsches Elektronen Synchrotron (HASYLAB), Notkestraße 85, 22607 Hamburg, Germany;5. Department of Physics, University of Helsinki, Helsinki, Finland;1. College of Architecture and Environment, Sichuan University, Chengdu 610207, PR China;2. State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, No.73 Huanghe Road, Nangang District, Harbin 150090, PR China;3. Department of Chemical & Environmental Engineering, University of Arizona, 1133 E James E Rogers Way, Tucson, AZ 85721, USA;1. Tsinghua-Kangda Research Institute of Environmental Nano-Engineering & Technology, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, Guangdong, China;2. School of Environment, Tsinghua University, Beijing 100084, China |
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| Abstract: | The effect of ozone back washing for membrane fouling reduction was experimentally investigated in a submerged metal membrane microfiltration system. A cleaning by intermittent ozone gas backwashing was effective in recovering the permeation flux. Intermittent ozone backwashing was highly effective than the air or permeates backwashing for flux recovery. Regarding the operational parameters, the increase of ozone gas flow rate was more effective than the increase of injection time under the conditions of same ozone dose. However, the backwashing cycle was longer, the effect of flux recovery by ozone backwashing decreased. Therefore, it is favorable to operate membrane cleaning before the foulant was consolidated on membrane surface. |
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