Research Abstracts

Vacuum membrane distillation (VMD) was employed to concentrate Ginseng extracts aqueous solution. Polytetrafluoroethylene (PTFE) micro-porous plate membranes, with average pore size of 0.2 mm and thickness of 50 mm, were used in VMD process. The effects of operating temperature, vacuum pressure and

The bioconversion of lignocellulosic biomass requires two main steps: cellulose and hemicellulose conversion (hydrolysis) to monosaccharides followed by fermentation of the monosaccharides into the desired products. Pretreatment of the lignocellulosic biomass is required to hydrolyse hemicellulose a

A dynamic analysis procedure has been adopted based on mass and force balances for particle deposition on the membrane surface to analysis and predict the particle fouling layer structure in microfiltration. The local properties in a fouling layer, say porosity distribution, resistance to fluid flow

The performance of the submerged membrane filtration system was investigated under various aeration rate and membrane inclination. The teat solutions were the aqueous solutions of PMMA and dextran T500. Experimental results show that aeration enhanced the permeate flux of PMMA solution more signific

The present investigation describes about the development of a cost effective system for real time monitoring of porosity of ion track etched membranes. The system uses a complementary metal oxide semiconductor (CMOS) image sensor to capture the image of the membranes from the optical microscope’s p

The gas transport properties of Polyimide membranes were examined as a function of physical aging time. A clear decrease of the gas permeability coefficient was observed. Interpretation of the permeation properties using results from differential scanning calorimeter and dynamic mechanical analyzer

Short- and long-term physical aging tests of high molecular weight poly(methyl methacrylate) (PMMA) membranes have been performed at different temperature. The effects of physical aging on the gas permeation properties are studied. Experimental data show that the physical aging decreases the volume

Based on the reversible volume phase transition of Poly(N-isopropylacrylamide) (PNIPAAm) around LCST, a simple temperature-change cleaning method for PNIPAAm grafted porous polyethylene membrane fouled by bovine serum albumin (BSA) was proposed. It was found that after the temperature-change cleanin

Correlations between positron annihilation lifetime spectroscopy (PALS) measurement and diffusivities in polymer solutions were established, with the help of the Simha–Somcynsky (SS) equation-of-state (EOS) and the free-volume theory. Mean hole volume probed by PALS was employed to predict the free

The effects of membrane pore size and operating conditions on the particle fouling in ‘‘dead-end’’ microfiltration are studied by use of membrane blocking models. Two track-etched membranes (Isopore1membrane) with the mean pore diameters of 0.2 and 0.4 mm, respectively, are used as the filter media