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Efficient Recovery of Organic Matter from Municipal Wastewater by a High-Rate Membrane Bioreactor Equipped with Flat-Sheet Ceramic Membranes
| Title: | Efficient Recovery of Organic Matter from Municipal Wastewater by a High-Rate Membrane Bioreactor Equipped with Flat-Sheet Ceramic Membranes |
| Authors: | Rocco, Michael Joseph Browse this author | | Hafuka, Akira Browse this author | | Tsuchiya, Toru Browse this author | | Kimura, Katsuki Browse this author →KAKEN DB |
| Keywords: | wastewater treatment | | carbon recovery | | membrane fouling | | granular scouring | | chemically enhanced backwash |
| Issue Date: | 3-Mar-2023 |
| Publisher: | MDPI |
| Journal Title: | Membranes |
| Volume: | 13 |
| Issue: | 3 |
| Start Page: | 300 |
| Publisher DOI: | 10.3390/membranes13030300 |
| Abstract: | High-rate processes have been investigated for the recovery of organic matter from municipal wastewater. High-rate membrane bioreactors (HR-MBRs) may simultaneously achieve the increased recovery of carbon and high effluent quality, although control of membrane fouling is extremely difficult. To address the severe fouling in HR-MBRs, the combination of granular scouring and frequent chemically enhanced backwashing was examined. The use of robust flat-sheet ceramic membranes enabled the application of those cleaning strategies. Experiments were carried out at an existing wastewater treatment plant. To operate as a high-rate system, the bioreactor solid residence time and hydraulic residence time were set at 0.5 days and 1.6 h, respectively. Although a relatively high flux of 20 L m(-2) h(-1) was applied, the proposed HR-MBR exhibited a very low fouling rate of 1.3 kPa/day. The system could recover >70% of the carbon from raw wastewater, whereas the concentration of chemical oxygen demand in the effluent was lowered to <20 mg/L. The performance of the proposed HR-MBR observed in this study was clearly superior to those reported in previous related studies. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/89257 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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