Research Papers by Zhanfeng Cui

The effect of sandwich configurations of paired ultrafiltration membranes on the transmission and rejection of proteins were evaluated using various sandwich arrangements. Data is presented for the fractionation of BSA and myoglobin, and for that of lysozyme and myoglobin. Two membranes were sandwic

Multi-photon microscopy, a fluorescence based technique, was used to image in-situ the fouling and cleaning of a 0.22 µm microfiltration membrane fouled by bovine serum albumin and ovalbumin. Imaging of the cleaning was possible for two of the three cleaning regimes used. The free chlorine cleaner b

It is technically feasible to use a two-stage ultrafiltration process with different membranes to extract lysozyme and ovalbumin from chicken egg white and to separate them into individual proteins with sufficient purity and product recovery. Selection of membranes and operational conditions is the

Protein sieving coefficients, concentration polarisation and membrane fouling could be significantly affected by solution pH, ionic strength and permeate flux. The pulsed sample injection technique could be an effective tool for studying the ultrafiltration behavior of proteins under different condi

In ultrafiltration (UF) processes, the mass transfer coefficient depends on the hydrodynamic shear at the membrane surface. Unfortunately, in all the existing UF test devices, shear stress is non-uniform and only an average value is used. This paper discusses the theory, design, fabrication, and exp

Gas–liquid slug flow is commonly employed as an enhancement technique for cross-flow ultrafiltration. This technique worked well on flat sheet and larger diameter membrane modules, but hydrodynamics and mass transfer, hence optimal operation, differs for the smaller diameter hollow fibre membranes w

The effects of pH and ionic strength (salt concentration) on transmission of single protein human serum albumin (HSA) and human immunoglobulins (HIgG) through a 100 kDa molecular weight cut-off (MWCO) polyethersulfone membrane have been studied using a pulsed sample injection technique. Experimental