【作者】 杨小敏； 周守勇； 李梅生； 赵宜江；

【Author】 Xiaomin Yang;Shouyong Zhou;Meisheng Li;Yijiang Zhao;School of Chemistry and Chemical Engineering,Huaian Key Laboratory of Advanced Environment Functional Materials,Huaiyin Normal University;School of Chemistry and Chemical Engineering,Ningxia University;

【机构】 淮阴师范学院化学化工学院,淮安市新型环境功能材料重点实验室,江苏省低维材料化学重点建设实验室,江苏省区域现代农业与环境保护协同创新中心； 宁夏大学化学化工学院；

【摘要】 采用凹土基微滤膜澄清高黏度纤维素酶发酵液。研究了操作压力、膜面流速、温度等过程参数对膜通量、浊度、蛋白质截留率、酶活损失的影响,考察了不同清洗方式对污染后的膜通量恢复的影响。结果表明,在温度25±3℃,操作压力0.1 MPa,膜面流速4 m/s下,膜通量最高,蛋白质截留率最大,酶活损失最小,并且渗透液浊度小于1NTU;污染后的凹土基微滤膜在30±3℃下用去离子水冲洗2次,每次30 min,再用0.01 mol/L的NaOH溶液循环清洗40 min,通量可恢复到新膜通量的90%左右。更多还原

【Abstract】 Attapulgite microfiltration membrane were used to deal with high viscosity cellulase fermentation broth. The influence of process parameter such as pressure,cross-flow velocity and temperature on membrane flux decline, turbidity, protein retention rate, enzyme activity loss were studied, and the influence of different cleaning steps on the regeneration of fouled membrane was investigated. The results showed that at the condition of ΔT=23±3℃,ΔP=0.1MPa and v=0.58 m·s-1, the protein retention rate reached the highest, and the activity of the enzyme was minimum, and the turbidity was less than 1 NTU. The fouled membrane’s water flux recovery rate was about 90% through water rinsing for 30 min at 30±3℃ twice and then 0.01 mol/L Na OH cleaning for 40 min.更多还原