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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Citation Formats

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.