高效反渗透工艺处理电厂废水

采用“机械加速澄清—重力式过滤—离子交换—除碳—高效反渗透” 工艺处理某电厂废水,将反渗透产水作为冷却塔补水。运行结果表明：弱酸阳离子交换器出水碱度≤0.10 mmol/L、硬度≤0.02 mmol/L、浊度≤0.2 NTU,满足高效反渗透对进水水质的要求;高效反渗透产水浊度<0.1 NTU,COD_Mn≤0.08 mg/L,硬度≤1.12 mg/L,碱度≤8.40 mg/L,ρ（总铁）<10 μg/L,ρ（总硅）<0.5 mg/L,电导率<45 μS/cm,出水水质满足回用要求。针对该系统存在的自用水率高、过滤器污堵以及水量不平衡等问题提出了相应的建议。

Treatment of wastewater from power plant by high efficiency reverse osmosis process

The wastewater from a power plant was treated by the process of mechanical accelerated clarification-gravity filtration-ion exchange-carbon separating-high efficiency reverse osmosis （HERO）,and the effluent was reused as circulating cooling water in the power plant. The running results show thatThe weak acid cation exchanger effluent with alkalinity less than 0.10 mmol/L,hardness less than 0.02 mmol/L and turbidity less than 0.2 NTU meets the requirements for HERO inlet water quality;The HERO effluent with turbidity less than 0.1 NTU,COD_Mn less than 0.08 mg/L,hardness less than 1.12 mg/L,alkalinity less than 8.40 mg/L,ρ（total iron） less than 10 μg/L,ρ（total silicon） less than 0.5 mg/L,conductivity less than 45 μS/cm meets the requirements for reuse water quality. To solve the problems in the system,such as high water consumption rate,filter fouling and water imbalance,the corresponding suggestions are put forward.