Membrane biofouling behaviors at cold temperatures in pilot-scale hollow fiber membrane bioreactors with quorum quenching
| Autor: | Pyung Kyu Park, Kibaek Lee, Chang Hyun Nahm, Jun Seong Park, Kwang-Ho Choo, Tahir Iqbal |
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| Rok vydání: | 2018 |
| Předmět: |
Biofouling
Pilot Projects 02 engineering and technology Wastewater 010501 environmental sciences Aquatic Science 01 natural sciences Applied Microbiology and Biotechnology Bioreactors Extracellular polymeric substance 0105 earth and related environmental sciences Water Science and Technology Bacteria Fouling Chemistry Quorum Sensing Membranes Artificial 021001 nanoscience & nanotechnology Cold Temperature Quorum sensing Membrane Chemical engineering Hollow fiber membrane Quorum Quenching 0210 nano-technology |
| Zdroj: | Biofouling. 34:912-924 |
| ISSN: | 1029-2454 0892-7014 |
| Popis: | In this study, the seasonality of the biofouling behavior of pilot-scale membrane bioreactors (MBRs) run in parallel with vacant sheets and quorum quenching (QQ) sheets using real municipal wastewater was investigated. QQ media delayed fouling, but low temperatures caused severe biofouling. The greater amount of extracellular polymeric substances (EPSs) produced in cold weather was responsible for the faster biofouling of a membrane, even with QQ media. There were significant negative relationships between EPS levels and water temperature. Cold weather was detrimental to the degradation of quorum sensing signal molecules by QQ sheets, whose activity was restored with a higher dose of QQ bacteria. The QQ bacteria in the sheets experienced a slight loss in activity during the early stage of the field test, but survived in the pilot-scale MBR fed with real wastewater. There were no significant discrepancies in treatment efficiency among conventional, vacant, and QQ MBRs. |
| Databáze: | OpenAIRE |
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