死端搅拌操作条件下平均膜污染度量指数变化
Variation of Average Membrane Foulant Index Under Dead-End Agitation Operation
刘慧慧 1王湛2
作者信息
- 1. 北京工业大学材料科学与工程学院化学工程与技术系,北京,100124
- 2. 绿色催化与分离北京市重点实验室,北京,100124
- 折叠
摘要
在死端搅拌微滤膜装置上,采用 0.1μ m孔径的PES平板微滤膜对酵母悬浮液进行过滤实验.研究瞬时膜污染度量指数φ(t)和平均膜污染度量指数(-φ)在不同操作条件下(搅拌速率、浓度、温度、压力和污染物)的变化规律.结果表明,搅拌速率 200 rmp时φ(t)最小,而(-φ)随搅拌速率的增加先增大后降低;在浓度、温度以及压力下,φ(t)均随时间递增,(-φ)随浓度递增.另外,(-φ)(酵母悬浮液)>(-φ)(活性污泥悬浮液)>(-φ)(高岭土悬浮液)则说明在实际过滤过程中,选择 2 g/L、25℃和 0.08 MPa作为固定操作条件,选择尽可能高搅拌速率和低料液浓度的高岭土悬浮液时的膜污染程度最轻.
Abstract
Yeast suspensions were fouled using PES flat microfiltration membrane with a diameter of 0.1 μm in a dead end stirred microfiltration membrane device.The variation of instantaneous membrane fouling index φ(t)and average membrane fouling index (-φ) under different operating conditions(stirring rate,concentration,temperature,pressure and foulants)were studied.The results show that φ(t)is the smallest at 200 rmp stirring rate and increases first and then decreases with the increase of stirring rate,while φ(t)increases with time and concentration under concentration,temperature and pressure.In addition,(-φ)(yeast suspension)>(-φ)(activated sludge suspension)>(-φ)(kaolin suspension)indicated that in the actual filtration process,2g/L,25℃ and 0.08 MPa were selected as the fixed operating conditions,and kaolin suspension with the highest stirring rate and low feed liquid concentration as possible would have the lightest membrane pollution degree.
关键词
死端微滤/平均膜污染度量指数/操作条件Key words
dead-end microfiltration/average membrane contamination index/operating conditions引用本文复制引用
出版年
2024
NETL
NSTL
万方数据