MBR-RO组合工艺生产直接饮用再生水的试验研究

采用膜生物反应器-反渗透(MBR-RO)组合工艺处理生活污水的过程中,MBR出水污染指数(SDI)在2.5~3.5之间,符合RO膜元件进水要求,且添加10mg/L阻垢剂后能有效控制RO膜的结垢问题。MBR-RO组合工艺的产水水质良好,其中常规水质指标COD_(Mn)浓度0.05mg/L、NH_4~+-N浓度0.15mg/L、NO_3~--N浓度2.82mg/L、NO_2~--N浓度0.7mg/L、TP浓度0.12mg/L,TOC浓度0.51mg/L,参照国家《生活饮用水卫生标准》中主要的73项指标分析,产水达到饮用水水质标准。本研究结果表明,采用MBR-RO组合工艺生产直接饮用再生水是可行的。

Direct potable reuse with MBR-RO combined process

The municipal domestic sewage was treated by a membrane bioreactor-reverse osmosis (MBR-RO) combined process. The SDI of MBR effluent was between 2.5 and 3.5, which met the demand of RO influent, and the fouling of RO membrane could be controlled after adding 10 mg/L of the antisludging agent. The product water quality of MBR-RO was good, and NH4+-N, NO2--N, TP and TOC concentrations of the effluent were respectively 0.15 mg/L, 2.82 mg/L, 0.12 mg/L and 0.51 mg/L, and the concentrations of CODMn and NO2--N were below 0.05 mg/L and 0.7 mg/L respectively in MBR-RO. According to the 73 major indexes in the national drinking water sanitary standard, the effluent could meet the drinking water quality. The result showed that MBR-RO combined process for direct potable reuse water production is feasible.