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Zur Problematik der Ultrafiltration von Weizenstärke‐Prozeßwasser
Author(s) -
Meuser F.,
Smolnik H.D.
Publication year - 1976
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19760281205
Subject(s) - ultrafiltration (renal) , membrane , filtration (mathematics) , chemistry , starch , permeation , chromatography , membrane technology , pulp and paper industry , chemical engineering , food science , biochemistry , mathematics , statistics , engineering
On the Problems of Ultrafiltration of Wheat Starch Processing Water . The problem of recovery of soluble substances from process water in wheat starch production compared to the starch production from corn and potatoes are mentioned. Membrane filtration was tested on a pilot scale level to recover the soluble substances of wheat flour. It was found that the flux rates of tested membranes were not affected by their structures. They depend upon the building of a gel type layer near the membrane surface. In the tubular modules the building of that layer could be affected to a certain degree by changing the flow characteristics. Besides the flux rates the retention capacities of different membranes — membranes for ultrafiltration and reverse osmose — were studied. It was found that the chemical oxygen demand (CSB) of the permeate was proportional to CSB of the retentate. With the help of experimental results the cost of membrane filtration in combination with the concentration of the retentate by evaporation compared to the cost of evaporating whole of the process water was estimated. It was concluded from this that the membrane filtration is not economical for the process water of wheat starch plant at present as the cost of equipment is high because large membrane surface is needed as the flux rates are low.