Applicability of a novel osmotic membrane bioreactor using a specific draw solution in wastewater treatment

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題名:	Applicability of a novel osmotic membrane bioreactor using a specific draw solution in wastewater treatment
作者:	林伯勳;Nguyen, Nguyen Cong;Chen, Shiao-Shing;Nguyen, Hau Thi;Ngo, Huu Hao;Guo, Wenshan;Hao, Chan Wen;Lin, Po-Hsun
貢獻者:	工學院環境工程研究所
關鍵詞:	Bacteria;biofilm;biopolymers;Bioreactors;Carrier;cleaning;Draw solution;EDTA (chelating agent);fluorescence;Flux;Forward osmosis;Fouling;Fourier transform infrared spectroscopy;Hybrid systems;Membranes;Membranes, Artificial;Moving bed biofilm;nitrogen dioxide;Osmosis;Osmotic membrane bioreactor;polyethylene;polyethylene glycol;Polyethylenes;scanning electron microscopy;Waste Disposal, Fluid - methods;Waste Water;wastewater;Wastewater treatment
日期:	2015-06-05
上傳時間:	2026-04-23 14:59:32 (UTC+8)
出版者:	Elsevier;Netherlands: Elsevier B.V
摘要:	摘要： This study aims to develop a new osmotic membrane bioreactor by combining a moving bed biofilm reactor (MBBR) with forward osmosis membrane bioreactor (FOMBR) to treat wastewater. Ethylenediaminetetraacetic acid disodium salt coupled with polyethylene glycol tert-octylphenyl ether was used as an innovative draw solution in this membrane hybrid system (MBBR–OsMBR) for minimizing the reverse salt flux and maintaining a healthy environment for the microorganism community. The results showed that the hybrid system achieved a stable water flux of 6.94L/m2h and low salt accumulation in the bioreactor for 68days of operation. At a filling rate of 40% (by volume of the bioreactor) of the polyethylene balls used as carriers, NH4+-N and PO43−-P were almost removed (>99%) while producing relatively low NO3−-N and NO2−-N in the effluent (e.g. <0.56 and 0.96mg/L, respectively). Furthermore, from analysis based on scanning electron microscopy, Fourier transform infrared spectroscopy, and fluorescence emission–excitation matrix spectrophotometry, there was a thin gel-like fouling layer on the FO membrane, which composed of bacteria as well as biopolymers and protein-like substances. Nonetheless, the formation of these fouling layers of the FO membrane in MBBR–OsMBR was reversible and removed by a physical cleaning technique. [Display omitted] •A novel osmotic membrane bioreactor (MBBR–OsMBR) using a novel draw solution (DS) was developed.•The MBBR–OsMBR system successfully reduced membrane fouling.•EDTA sodium coupled with Triton X-100 as novel DS resulted in low salt accumulation.•Nitrification and denitrification were well performed in a biocarrier.•The MBBR–OsMBR could remarkably remove phosphorus. 其他題名： Sci Total Environ 出版者： Netherlands: Elsevier B.V 出版日期： 2015-06-15 出處： The Science of the total environment, 2015-06, Vol.518-519, p.586-594 版權： 2015 Elsevier B.V. 版權： Copyright © 2015 Elsevier B.V. All rights reserved. 識別號： ISSN: 0048-9697 識別號： ISSN: 1879-1026 識別號： EISSN: 1879-1026 識別號： DOI: 10.1016/j.scitotenv.2015.03.011 識別號： PMID: 25790914
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