Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd., Taipei 106, Taiwan, ROC.
Institute of Environmental Engineering and Management, National Taipei University of Technology, No. 1, Sec. 3, Chung-Hsiao E. Rd., Taipei 106, Taiwan, ROC.
Sci Total Environ. 2015 Jun 15;518-519:586-94. doi: 10.1016/j.scitotenv.2015.03.011. Epub 2015 Mar 16.
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 6.94 L/m(2) h and low salt accumulation in the bioreactor for 68 days of operation. At a filling rate of 40% (by volume of the bioreactor) of the polyethylene balls used as carriers, NH4(+)-N and PO4(3-)-P were almost removed (>99%) while producing relatively low NO3(-)-N and NO2(-)-N in the effluent (e.g. <0.56 and 0.96 mg/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.
本研究旨在通过将移动床生物膜反应器（MBBR）与正向渗透膜生物反应器（FOMBR）相结合，开发一种新型的渗透膜生物反应器，以处理废水。乙二胺四乙酸二钠盐与聚乙二醇叔辛基苯基醚结合作为一种创新的汲取液，用于膜混合系统（MBBR-OsMBR），以最小化反向盐通量并维持微生物群落的健康环境。结果表明，该混合系统在 68 天的运行中实现了稳定的水通量 6.94 L/m² h 和生物反应器中的低盐积累。在用作载体的聚乙烯球的填充率为 40%（生物反应器体积的百分比）时，NH4(+)-N 和 PO4(3-)-P 几乎被完全去除（>99%），而在出水中产生相对较低的 NO3(-)-N 和 NO2(-)-N（例如，分别为<0.56 和 0.96 mg/L）。此外，根据扫描电子显微镜、傅里叶变换红外光谱和荧光发射-激发矩阵分光光度法的分析，FO 膜上存在一层薄的凝胶状污垢层，由细菌以及生物聚合物和蛋白样物质组成。然而，MBBR-OsMBR 中 FO 膜形成的这些污垢层是可逆的，可以通过物理清洗技术去除。
