超滤-反渗透集成膜技术深度处理酒精废水

采用超滤-反渗透集成膜技术对酒精废水二级生化处理出水进行深度处理,考察了不同超滤膜对废水的预处理性能,研究了超滤-反渗透集成膜技术对废水污染物的去除效果,并探索了不同清洗方式对反渗透膜通量恢复的影响。试验结果表明:超滤能有效地去除废水浊度和大分子有机物,为反渗透提供良好的进水水质;超滤-反渗透膜系统产水浊度、硬度、总铁均小于0.1 NTU、0.03 mmol/L和0.03 mg/L,电导率处于60~120μS/cm之间,可回用作锅炉补充水;酸洗+碱洗组合清洗方式能有效恢复反渗透膜通量,其废水膜通量可恢复为新膜废水通量的93.75%。

Advanced Treatment of Alcohol Wastewater Using UF-RO Integrated Technology

Experiment was done for the advanced treatment of secondary effluent from alcohol wastewater by using UF-RO integrated technology.Effects of recovery of reverse osmosis(RO) membrane flux by different cleaning methods were studied,influence of different ultrafiltration membranes on wastewater treatment was discussed,and removal rate of pollutants were examined using UF-RO integrated technology.It appeared that ultrafiltration had good performance on removal of turbidity and organic matters with high molecular weight,which could guarantee good quality of feed water for reverse osmosis.The turbidity,total hardness and total iron for the effluent was no more than 0.1 NTU,0.03 mmol/L and 0.03 mg/L,and electrical conductivity was between 60 and 120 μS/cm,which could be directly used as boiler make-up water.The cleaning method of acid washing and alkali washing could effectively recover the membrane flux of reverse osmosis,with the membrane flux able to be recovered as 93.75% as raw water flux.