电渗析组合反渗透过程处理头孢氨苄酶法母液废水的研究

Study on the treatment of waste water of the cephalexin enzymatic process by the combination process of electrodialysis and reverse osmosis

利用电渗析技术脱除头孢氨苄酶法母液废水中的盐分,研究了操作电压、浓缩室与淡化室流速比、温度等因素对电渗析脱盐过程的影响,并研究了反渗透膜法处理脱盐母液废水的膜通量变化趋势。实验结果表明,当淡化室、浓缩室流量均为500 L/h(流速比1∶1),操作电压为25 V,温度<30℃时,电渗析在高效脱盐的同时具有理想的有机物截留率达99.50%以上,能耗3.65 kW.h/kg;反渗透膜法在处理脱盐母液废水时,膜通量衰减较慢,水回收率达到75.67%。实验结果表明,利用电渗析、反渗透组合工艺处理头孢氨苄酶法母液废水具有良好的可行性。

The salt in the waste water of the cephalexin enzymatic process was removed by electrodialysis. The influences of operating voltage,velocity ratio and temperature on the desal ination process were investigated. The change of the permeate flux in the reverse osmosis sepa ration process was also studied. The results showed that the electrodialysis process performed better in desalination with the organic matter retention rate reaching 99.50%,the energy con sumption of 3.65 kW？h/kg at the conditions of the flow of 500 L/h （velocity ratio of 1∶1）,the operating voltage of 25 V and temperature〈30℃. During the reverse osmosis separation pro cess,the decay of permeate flux was slow and acceptable,and the water recovery rate was 75.67%. All results showed that it was feasible to treatment the waste water of the cephalexin enzymatic process by a combined process of electrodialysis and reverse osmosis.