Treatment of textile wastewaters using Eutectic Freeze Crystallization

Journal Article

2014

Permanent link to this Item
http://hdl.handle.net/11427/13088
 http://dx.doi.org/10.2166/wst.2014.289
Authors
Randall, Dyllon
Zinn, C
Lewis, Alison Emslie
Journal Title

Water Science and Technology

Link to Journal
http://www.iwaponline.com/wst/default.htm
Journal ISSN
Volume Title
Publisher

IWA publishing

Publisher

University of Cape Town

Department
Crystallisation and Precipitation Research
Faculty
Faculty of Engineering and the Built Environment
License
Series
Abstract
A water treatment process needs to recover both water and other useful products if the process is to be viewed as being financially and environmentally sustainable. Eutectic Freeze Crystallization (EFC) is one such sustainable water treatment process that is able to produce both pure ice (water) and pure salt(s) by operating at a specific temperature. The use of EFC for the treatment of water is particularly useful in the textile industry because ice crystallization excludes all impurities from the recovered water, including dyes. Also, EFC can produce various salts with the intention of reusing these salts in the process. This study investigated the feasibility of EFC as a treatment method for textile industry wastewaters. The results showed that EFC can be used to convert 95% of the wastewater stream to pure ice (98% purity) and sodium sulfate.
Description

Reference:

Randall, D.G., Zinn, C and Lewis, A.E.(2014). Treatment of textile wastewaters using Eutectic Freeze Crystallisation. Water Science and Technology, 70 (4): 736–741

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