Comparison of hybrid ultrafiltration-osmotic membrane bioreactor and conventional membrane bioreactor for oil refinery effluent treatment
| Autor: | Clara V. Faria, Ana Cláudia Cerqueira, Bárbara C. Ricci, Eduardo Coutinho de Paula, Míriam Cristina Santos Amaral, Priscila Barbosa Moser, Clara Bretas |
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| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Fouling General Chemical Engineering Membrane fouling Ultrafiltration 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Membrane bioreactor Pulp and paper industry 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences Membrane chemistry Bioreactor Environmental Chemistry Organic matter 0210 nano-technology Effluent |
| Zdroj: | Chemical Engineering Journal. 378:121952 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2019.121952 |
| Popis: | Although membrane bioreactors (MBR) has become the preferred choice for oil refinery reclamation, the osmotic membrane bioreactor (OMBR) has gained interest in the last years because of the low membrane fouling propensity and the high rejection capacity to both inorganic and organic contaminants. However, progress of OMBR is hindered by the salinity build-up in the bioreactor. This study evaluated the hybrid ultrafiltration-osmotic membrane bioreactors (UF-OMBR) performance in the treatment of oil refinery effluent and compare its performance with conventional MBR focusing the mixed liquor characteristics, the membrane fouling and the overall performance. The results indicated that the salinity build-up in the biological reactor was successfully prevented by integrating ultrafiltration to OMBR. Dissolved organic carbon (DOC) removal efficiencies for the UF and FO in the UF-OMBR were 81 ± 15 and 99.6 ± 0.5%, respectively, while for UF in the conventional MBR was 66 ± 8%. The high removal efficiency for UF in UF-OMBR compared to UF in conventional MBR can be attributed to the longer retention time of recalcitrant organic compounds. This could occur due to the high rejection of FO membrane which is not attenuated by UF permeate as efficiently as it was observed for salinity. However, this organic matter build-up in the biological reactor contributed to the greater UF membrane fouling in UF-OMBR compared to in conventional MBR. Low fouling tendency was observed for FO membrane. Overall, the UF-OMBR process was able of simultaneously producing two streams (UF and FO permeate) with different opportunities for water reclamation. |
| Databáze: | OpenAIRE |
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