Organic matter removal from a membrane bioreactor effluent for reverse osmosis fouling mitigation by microgranular adsorptive filtration system
| Autor: | Tao Hua, Aditya Anantharaman, Mark M. Benjamin, Jia Wei Chew, Nathan Cai, Youngpil Chun, Rong Wang |
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| Přispěvatelé: | School of Civil and Environmental Engineering, School of Chemical and Biomedical Engineering, Nanyang Environment and Water Research Institute, Singapore Membrane Technology Centre |
| Rok vydání: | 2021 |
| Předmět: |
Powdered activated carbon treatment
Fouling mitigation Civil engineering [Engineering] Fouling Chemistry Mechanical Engineering General Chemical Engineering Membrane fouling 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Membrane bioreactor Pulp and paper industry Dynamic Membranes Ceramic membrane 020401 chemical engineering Heated Aluminum Oxide Particles General Materials Science 0204 chemical engineering 0210 nano-technology Reverse osmosis Effluent Water Science and Technology |
| Zdroj: | Desalination. 506:115016 |
| ISSN: | 0011-9164 |
| DOI: | 10.1016/j.desal.2021.115016 |
| Popis: | In this study, a prototype microgranular adsorptive filtration (μGAF) system was constructed employing a 7-bore ceramic membrane as the primary membrane and either heated aluminum oxide particles (HAOPs) or powdered activated carbon (PAC) as the pre-deposited dynamic membrane (DM). The system was used to pre-treat membrane bioreactor (MBR) effluent from a full-scale MBR-reverse osmosis (RO) water reclamation plant. The downstream RO performance and membrane fouling potential of the treated effluent were then assessed. The results indicated that: (i) although PAC removed more overall EfOM than HAOPs did, HAOPs were more effective in removing biopolymers such as polysaccharides and proteins, (ii) HAOPs virtually eliminated fouling of the primary ceramic membrane, whereas considerable fouling (much of it irreversible) occurred when the feed was pretreated with PAC, (iii) HAOPs removed more than 90% of the phosphorus and fluoride from the feed, but PAC removed negligible amounts of these contaminants, and (iv) HAOPs-treated effluent resulted in only a 43% decline in RO permeate water flux over 5 d of continuous filtration, as opposed to 62% flux decline for untreated or PAC-treated effluent. This study thus demonstrates the effectiveness of the HAOPs-based μGAF process as a pre-treatment for improving downstream RO recovery. Economic Development Board (EDB) National Research Foundation (NRF) Submitted/Accepted version This research grant was supported by the Singapore National Research Foundation under its Environment and Water Research Program and administered by PUB, Singapore’s National Water Agency (grant number: 1601-CRPW-T20). The Singapore Membrane Technology Center, Nanyang Environment and Water Research Institute, Nanyang Technological University is supported by the Economic Development Board of Singapore. |
| Databáze: | OpenAIRE |
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