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Improved ultrafiltration processes by partial recycle of ultrafiltrate

Authors
Journal
Journal of Membrane Science
0376-7388
Publisher
Elsevier
Publication Date
Volume
15
Issue
1
Identifiers
DOI: 10.1016/s0376-7388(00)81358-7
Disciplines
  • Economics
  • Mathematics

Abstract

Abstract The economics of ultrafiltration processes may be improved in certain situations by partially recycling the ultrafiltrate. These situations include purification processes involving the use of additives in the makeup stream or processes where a recoverable product is present in the ultrafiltrate. A mathematical solution to this approach has been obtained to calculate the number of stages required as a function of the purification desired, the rejection coefficient of the species being removed, and the number of diavolumes. Some economic comparisons have been performed for multiple-stage ultrafiltration processes and compared with conventional single-stage diafiltration processes.

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