Tubular cellulose acetate reverse osmosis membranes for treatment of oily wastewaters

Abstract

This paper reviews briefly a specific application oriented product research and development program for making tubular cellulose acetate reverse osmosis membranes suitable for ultrafiltration treatment of oily wastewaters arising in automotive and similar industries. Details of production, specification, and typical performance of such membranes are given. A commercial version of the membranes developed is currently available as Electrohome ultrafiltration modules. These modules show an average permeate productivity of 1.22 m3/m2 day (30 gat/ft2 day) at a mean operating pressure of about 345 kPag (~50 psig) with an oil concentration in the range 5 to 35% on the feed side of membrane in the entire module; the permeate water contains less than 1 % of solute (emulsifiers and washing chemicals), with practically no oil. Based on savings arising from oil recovery and water reuse, the payback time for ultrafiltration units involving the above modules could be as low as six months.

Application of confocal laser scanning microscope technique to visualize dynamic sorption behavior of perylene in cellulose acetate film

“…In this study, cellulose acetate (CA) was used as a polymer material. CA is widely used in various industrial fields for applications such as cigarette filters, clothing, water purification, and medical uses,23, 24 and a number of studies on the sorption behavior of water and alcohols in CA have been reported 25–27. As a fluorescent reagent and a plasticizer, perylene and glycerol triacetate (GTA), respectively, were selected for visualizing the distribution of perylene in a CA casting film.…”

Demulsification of water/oil/solid emulsions by hollow‐fiber membranes

“…Lee et al (1984) used hydrophilic ultrafiltration membranes (Iris 3042, Rhone Poulenc) to remove soluble oils. Kutowy et al (1981) used cellulose acetate (hydrophilic) membranes for treatment of oily wastes containing 5 to 35% oil. Scott et al (1992) studied emulsions having up to 40% oil using hydrophilic membranes (cellulose acetate, regenerated celIulose, and coated regenerated cellulose).…”

Visualization of Sorption Dynamics: Application of Confocal Laser Scanning Microscope Technique

“…As a fluorescent reagent and a polymer material, perylene and cellulose acetate (CA) were used, respectively. CA is widely used in various industrial fields such as for cigarette filters, clothing, water purification and medical applications 27,28 , and there are a number of studies reported on the sorption behavior of water and alcohols into CA [29][30][31] . Additives for dissolving penetrant perylene were glycerol triacetate (GTA), triethylene glycol diacetate (TEGDA), 1,3-butylene glycol diacetate (BGDA), paraffin liquid and polyethylene glycol 200 (PEG), in which GTA, TEGDA and BGDA are known as the plasticizers for CA 32,33 , and paraffin liquid and PEG for additives of CA filters in cigarette industrial field 34,35 .…”