ENHANCING BIODEGRADABILITY OF REFRACTORY AROMATICS IN WASTEWATER: PRETREATMENT WITH ELEMENTAL IRON
Authors: Perey, Jennie R.; Lubenow, Brian L.; Chiu, Pei C.; Huang, Chin-Pao; Cha, Daniel K.
Source: Proceedings of the Water Environment Federation, Industrial Wastes 2002 , pp. 833-846(14)
Publisher: Water Environment Federation
Abstract:The objective of this research is to evaluate an integrated system coupling zero-valent iron (Fe0) and aerobic biological oxidation for treatment of azo dye wastewater. Zero-valent iron can be used to reduce the azo bond, cleaving dye molecules into products that are more amenable for mineralization by bacteria in aerobic biological treatment processes. Azo dye reduction products, including aniline and sulfanilic acid, have been shown to be readily biodegradable at concentrations up to approximately 25 mg/L. This batch reduction and biodegradation data has been used to support an integrated iron pretreatment/activated sludge process for the treatment of the azo dyes orange G and orange I. The integrated system was able to decolorize dye solutions and yield effluents with lower total organic carbon concentrations than control systems without iron pretreatment. The success of the bench-scale integrated system demonstrates that iron pretreatment technology is a feasible option for treatment of dye-containing wastewaters.
Document Type: Research article
Publication date: 2002-01-01
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- ingentaconnect is not responsible for the content or availability of external websites