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Electrochemical oxidation and ozonation for textile wastewater reuse

TitleElectrochemical oxidation and ozonation for textile wastewater reuse
Publication TypeJournal Article
Year of Publication2006
AuthorsLeshem EN, Pines DS, Ergas SJ, Reckhow DA
JournalJournal of Environmental Engineering
Volume132
Issue3
Start Page324
Pagination324-330
Date Published03/2006
ISSN0733-9372
KeywordsIndustrial wastes, Oxidation, Ozone, Wastewater management, Water reuse
Abstract

Treatment technologies were evaluated for application in water reuse for the textile industry. Technologies tested included electrochemical oxidation, hypochlorite oxidation, ozonation, granular activated carbon (GAC) adsorption, bisulfite catalyzed sodium borohydride reduction, Fenton’s reagent, coagulation, and anaerobic biodegradation. Bench-scale side-by-side tests were conducted using a spent dyebath wastewater from a jigg dyeing operation. The dyebath contained three reactive dyes and auxiliary chemicals (e.g., common salt, soda ash, acetic acid, and caustic). Each technology was evaluated for its effectiveness at removing color and chemical oxygen demand (COD) and anticipated operating costs. Ozone, GAC, and electrochemical oxidation produced high-quality effluent, suitable for reuse. Although hypochlorite oxidation and sodium borohydride reduction resulted in significant color removal, it was not sufficient to meet reuse criteria. Results were either insignificant or inconclusive for coagulation, Fenton’s reagent, and anaerobic biodegradation. Auxiliary chemicals had great impact on the performance of many of the alternatives evaluated.

DOI10.1061/(ASCE)0733-9372(2006)132:3(324)