CAJ | 학술논문

将超声场引入超滤过程,研究开发出全自动超声强化超滤中试系统并用于南瓜多糖的分离纯化,考察了超滤过程中超声频率、超声功率和超滤温度、压力对膜分离性能的影响.结果表明:超声可显著提高膜通量和截留率,减轻超滤过程的膜污染,超滤120 min后,超声强化的超滤膜通量最多仅下降11%,远低于未加超声时的30%;随功率增加,平均膜通量和截留率增大;低频超声对超滤的强化效果优于高频超声;高温和低压更有利于超滤过程的超声强化.
장초성장인입초려과정,연구개발출전자동초성강화초려중시계통병용우남과다당적분리순화,고찰료초려과정중초성빈솔、초성공솔화초려온도、압력대막분리성능적영향.결과표명:초성가현저제고막통량화절류솔,감경초려과정적막오염,초려120 min후,초성강화적초려막통량최다부하강11%,원저우미가초성시적30%;수공솔증가,평균막통량화절류솔증대;저빈초성대초려적강화효과우우고빈초성;고온화저압경유리우초려과정적초성강화.
By introducing ultrasonic in the ultrafiltration process, a pilot ultrasonic-enhanced ultrafiltration system was developed and was used to concentrate pumpkin polysaccharides. The effects of ultrasonic frequency and power as well as operation temperature and pressure on the ultrafiltration properties were then investigated. The results indicate that: (1)ultrasonic effectively overcomes the membrane fouling and improves the permeation flux and rejection, after an ultrafiltration for 120 min, the permeation flux decreases by less than 11%, while that without ultrasonic enhancement by 30%;(2)the average membrane flux and rejection both increase with ultrasonic power;(3)low-frequency ultrasonic is superior to the high-frequency one in terms of enhancing the ultrafiltration;(4)the ultrafiltration of PP can be enhanced more greatly at low pressure and high temperature.