ISSN:
1750-3841
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Commercial membrane processing is an emerging new field. Consequently, there is still much to be learned about the process in general and about particular applications. Except for the dairy industry, little work has been reported in the literature relative to food processing. The purpose of the work reported was to determine which factors influence membrane performance when processing cottonseed protein extracts by ultrafiltration. Interest was centered on those factors affecting membrane flux and ways to improve and maintain the flux during processing. Maintenance of membrane flux is imperative for the process to be economically feasible on a commercial scale. Protein extracts were prepared at the Food Protein Research and Development Center (FPRDC) pilot plant from glandless cottonseed flour using a selective extraction procedure. Extracts were pasteurized and processed directly or frozen until used. The effects of pressure, feed velocity, temperature and feed composition on permeate flux were investigated using different membranes and membrane systems. It was found that permeate flux could be estimated as a function of Reynolds number. Viscosity, an important variable in Reynolds number, was found to be a function of total Kjeldahl nitrogen in the membrane feed solution and the relation was of the form v= aBN where v is kinematic viscosity and N is feed nitrogen content, and a and B are constants which are functions of temperature. The viscosity did not correlate as strongly with total organics (total solids minus ash) or carbohydrates as with total nitrogen.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2621.1977.tb12610.x
