Treatment of textile effluent by chemical (Fenton's Reagent) and biological (sequencing batch reactor) oxidation

• Type: Article in International Scientific Journal
• Date: 2009

Authors

Carmen Rodrigues (Author) FEUP; Luis M. Madeira (Author) FEUP; Rui A. R. Boaventura (Author) FEUP

Journal

Title: Journal of Hazardous Materials

Vol. 172 No. 2

Pages: 1551-1559

ISSN: 0304-3894

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 68 Citations

ISI Web of Science

Scopus - 82 Citations

Scientific classification

FOS: Engineering and technology > Environmental engineering

Other information

Authenticus ID: P-003-DHZ

DOI: 10.1016/j.jhazmat.2009.08.027

Abstract (EN): The removal of organic compounds and colour from a synthetic effluent simulating a cotton dyeing wastewater was evaluated by using a combined process of Fenton's Reagent oxidation and biological degradation in a sequencing batch reactor(SBR). The experimental design methodology was first applied to the chemical oxidation process in order to determine the values of temperature. ferrous ion concentration and hydrogen peroxide concentration that maximize dissolved organic carbon (DOC) and colour removals and increase the effluent's biodegradability. Additional studies on the biological oxidation (SBR) of the raw and previously submitted to Fenton's oxidation effluent had been performed during 15 cycles (i.e., up to steady-state conditions), each one with the duration of 11.5 h; Fenton's oxidation was performed either in conditions that maximize the colour removal or the increase in the biodegradability. The obtained results allowed concluding that the combination of the two treatment processes provides much better removals of DOC, BOD(5) and colour than the biological or chemical treatment alone. Moreover, the removal of organic matter in the integrated process is particularly effective when Fenton's pre-oxidation is carried out under conditions that promote the maximum increase in wastewater biodegradability.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9