Direct membrane filtration of municipal wastewater: Linking periodical physical cleaning with fouling mechanisms
نویسندگان
چکیده
Direct membrane filtration (DMF) is a promising alternative secondary wastewater treatment process in Iceland, where biological not effective due to low strength nature and temperature. This study aims investigate fouling mechanisms mitigation approaches during DMF of municipal using crossflow system integrated with an optical coherence tomography (OCT) imaging system. During wastewater, it was observed that intermediate pore blocking dominant the early stage fouling, followed by cake filtration. Multi-filtration cycles were performed under different conditions, results revealed (1) elevating flushing water temperature from 25 50 °C greatly reduced constant accompanied decreased physically-irreversible fouling; (2) increasing both velocities did influence constant, but caused lower reducing physically-reversible irreversible (3) extending filtration-flushing duration interval appeared slightly constant; (4) cycles, shift reversible noticed associated compression tightly attached layer readily removed periodical flushing. A combination physical short term chemical-enhanced cleaning employed sustainable long-term operation achieved. Furthermore, foulants autopsy indicated biofouling combined organic/inorganic influenced development.
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ژورنال
عنوان ژورنال: Separation and Purification Technology
سال: 2021
ISSN: ['1873-3794', '1383-5866']
DOI: https://doi.org/10.1016/j.seppur.2020.118125