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Air slugs entrapped cross‐flow filtration of bacterial suspensions

1993; Wiley; Volume: 41; Issue: 5 Linguagem: Inglês

10.1002/bit.260410504

1097-0290

Cheng‐Kang Lee, We‐Gwo Chang, Yi‐Hsu Ju,

Electrospun Nanofibers in Biomedical Applications

A novel cross-flow technique for membrane filtration of bacterial cell suspensions was established. This is an air slugs entrapped cross-flow method in which air slugs were generated by introducing air into the cross-flow stream. As air slugs moved along with cross-flow, the disturbance of cell sublayer formation on membrane surface was enhanced. As a consequence, filtration flux was improved and stabilized. The effect of air slugs on improving filtration flux was more pronounced in filtering gram-negative Escherichia coli cell than gram-positive Brevibacterium flavum cell. Moreover, air slug was about 50% more effective on reducing filtration resistance using ultrafiltration (UF) membrane of 300,000 molecular weight cutoff (MWCO) than microfiltration (MF) membrane of 0.2 microm.