【摘要】 采用超滤膜法浓缩剩余污泥中的蛋白提取液,并对浓缩过程中的膜污染展开分析,在此基础上,确定了污染膜适宜的清洗工艺.研究证明,采用超滤膜法浓缩剩余污泥中的蛋白质提取液是可行的.在室温条件下,操作压力为0.10～0.18MPa时,压力的升高有利于膜通量的增加,但也会增加膜污染的速率;浓缩过程中适当的清洗,不仅可以提高工作效率,还有利于膜通量的恢复;采用清水、碱性清洗剂(0.3%的NaOH和0.1%的NaClO混合液)、酸性清洗剂(0.1%的盐酸溶液),以动静态混合的方式清洗后,膜通量恢复率(WFR)可达到90%以上.更多还原

【Abstract】 The Concentration of protein extracted from residual activated sludge using ultrafiltration membrane is investigated,and membrane fouling is analyzed and the appropriate membrane cleaning process is obtained.The experiment results indicate that it is feasible to concentrate protein extracted from residual activated sludge by ultrafiltration membrane.The permeate flux increased following the rising of operation pressure but resulted in more rapidly decrease of flux under pressure 0.10-0.18 MPa and at temperature 25 ℃;cleaning the membrane during the process of concentration not only increase the efficiency,but also is good for the recovery of membrane flux.The membrane flux recovery can be up to more than 90% after the cleaning procedures using water,alkaline cleaner (0.3% sodium hydroxide solution and 0.1% sodium hypochlorite solution),acidic cleaner(0.1% hydrochloric acid)with the way of the combination of static and dynamic.更多还原