【摘要】 以工业园区含盐废水为处理对象,采用多种膜组合处理技术,逐级回收含盐废水中的淡水,通过提高膜浓液的含盐量,降低进入蒸发工序的水量。探讨了系统的水回收率以及子系统的出水水质,考察了纳滤系统对一价阴离子和高价阴离子的分离情况。试验结果表明,采用膜组合工艺处理含盐废水,水回收率在96%以上,回用水水质达到《城市污水再生利用工业用水水质》(GB/T 19923—2005)中"敞开式循环冷却水系统补充水"标准,该工艺能够与蒸发结晶和冷冻结晶技术联用,实现含盐废水的"零排放"。更多还原

【Abstract】 The salty wastewater discharged from industrial parks was treated by membrane combination process. Fresh water was recovered from the wastewater in different stage. The salt concentration was increased,and the evaporation load was decreased. The water recovery of system and the water quality of the subsystems were investigated. The separation of monovalent and polyvalent anions by nano-filtration was also studied. The results showed that 96% of the wastewater was recovered by the membrane combination process. The quality of the recycled water met the make-up water of opened recirculation cooling water system standard in The Reuse of Urban Recycling Water—Water Quality Standard for Industrial Uses( GB/T 19923-2005). This process could couple with the evaporative crystallization and freeze crystallization processes to achieve zero emissions.更多还原