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Microfiltration/ultrafiltration as pretreatment for reclamation of rinsing waters of indigo dyeing
Date
2009-05-15
Author
Uzal, Nigmet
Yılmaz, Levent
Yetiş, Ülkü
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This paper focuses Oil the applicability of microfiltration (MF)/ultrafiltration (UF) as a pretreatment to nanofiltration (NF) for the reclamation of rinsing waters of indigo dyeing process. Two different MF alternatives, single 5 mu m MF and sequential 5 mu m + 0.45 mu m MF, were evaluated as prefiltration to improve the performance of the proceeding UF stage. UF tests performed after 5 pin MF Using 100 kDa, 50 kDa, 20 kDa, 2 kDa and 1 kDa membranes have indicated that all the UF membranes provided the same cumulative color retention of 98-99%. However, in terms of COD retention, UF membranes presented different performances and the highest retentions were by both 50 kDa (56%) and 100 kDa (59%) membranes. As regards permeation rate, 100 kDa and 50 kDa UF membranes appeared to have the highest flux decline chic to fouling. When sequential MF (5 mu m + 0.45 mu m) was adopted to decrease this fouling, 0.45 mu m MF before UF was found not to provide any significant improvement. Thus. single stage 5 mu m MF followed by 100 kDa UF was selected as the best prefiltration train to NF that permits the textile producer to reclaim indigo dyeing wastewater.
Subject Keywords
Mechanical Engineering
,
General Materials Science
,
General Chemistry
,
General Chemical Engineering
,
Water Science and Technology
URI
https://hdl.handle.net/11511/48208
Journal
DESALINATION
DOI
https://doi.org/10.1016/j.desal.2007.10.092
Collections
Department of Chemical Engineering, Article
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N. Uzal, L. Yılmaz, and Ü. Yetiş, “Microfiltration/ultrafiltration as pretreatment for reclamation of rinsing waters of indigo dyeing,”
DESALINATION
, pp. 198–208, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48208.