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Removal of phosphorus by a high rate membrane adsorption hybrid system

Johir, M.A.H., Nguyen, Tien Thanh, Mahatheva, K., Pradhan, M., Ngo, Huu Hao, Guo, Wenshan, Vigneswaran, Saravanamuth
Bioresource technology 2016 v.201 pp. 365-369
adsorbents, adsorption, anion exchange resins, bioreactors, phosphates, phosphorus, zirconium
Membrane adsorption hybrid system (MAHS) was evaluated for the removal of phosphate from a high rate membrane bioreactor (HR-MBR) effluent. The HR-MBR was operated at permeate flux of 30L/m2h. The results indicated that the HR-MBR could eliminate 93.1±1.5% of DOC while removing less than 53% phosphate (PO4-P). Due to low phosphate removal by HR-MBR, a post-treatment of strong base anion exchange resin (Dowex∗21K-XLT), and zirconium (IV) hydroxide were used as adsorbent in MAHS for further removal of phosphate from HR-MBR effluent. It was found that the MAHS enabled to eliminate more than 85% of PO4-P from HR-MBR effluent. Hence, HR-MBR followed by MAHS lead to simultaneous removal of organics and phosphate in a reliable manner. The experiments were conducted only for a short period to investigate the efficiency of these resins/adsorbents on the removal of phosphorus and high rate MBR for organic removal.