陶瓷膜在洗浴污水中的膜恢复条件研究

A Study on Ceramic Membrane in the Bathing Wastewater under Membrane Recovery Condition

采用0.05μm陶瓷膜对洗浴污水进行分离效果试验,对比过滤前后洗浴污水常规指标的变化情况,分析膜通量的变化规律。探究膜污染后膜通量恢复的最佳条件,运用物理、化学及物理化学联合方法进行清洗,得出最佳的清洗方法。试验结果表明,0.05μm的陶瓷膜对洗浴污水的浊度、悬浮物、COD、BOD、微生物去除效果较好,洗浴污水循环过滤后可就地直接回用于池水;膜通量恢复方法中,利用单步物理清洗和化学清洗正交试验得出物理-化学复合清洗的最佳条件,即先超声5min,再用2%的柠檬酸反冲洗30min,清洗后膜通量恢复率高达99%。

The changes of convetional indexes of bathing wastewater before and after filtration were com-paratively analyzed by the separating bathing wastewater with ceramic membrane of 0.05μm.To explore the best conditions for membrane flax recovery after membrane being polluted,the best cleaning method was obtained by using physical,chemical and physico-chemical joint cleaning method.The results showed that the ceramic membrane with a pore size of 0.05μm had better removal effect on turbidity of bathing wastewater,suspended solids,COD BOD and microbe indicators.In the method of membrane flux recovery, the optimum conditions of physico-chemical recombination cleaning were obtained by using single-step physical cleaning and orthogonal experiment of chemical cleaning,namely first ultrasound was used for 5 min,the 2% of citric acid was used to be recoiled for 30 min.The membrane flux recovery rate was 99%after cleaning.