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Pilot plant scale reactive dyes degradation by solar photo-Fenton and biological processes

Paper ID Volume ID Publish Year Pages File Format Full-Text
27716 44039 2008 10 PDF Available
Title
Pilot plant scale reactive dyes degradation by solar photo-Fenton and biological processes
Abstract

Solar photo-Fenton reactions as a stand-alone process and as a pre-treatment of an aerobic biological treatment for Procion Red H-E7B and Cibacron Red FN-R reactive dyes degradation have been carried out at pilot plant scale. Photo-Fenton oxidation was conducted using a Compound Parabolic Collector (CPC) solar photo-reactor and the biological treatment was carried out with an Immobilised Biomass Reactor (IBR). Artificial light photo-Fenton experiments carried out at laboratory scale have been taken as starting point. When applying photo-Fenton reaction as a single process, 10 mg L−1 Fe (II) and 250 mg L−1 H2O2 for 250 mg L−1 Procion Red H-E7B treatment, and 20 mg L−1 Fe (II) and 500 mg L−1 H2O2 for 250 mg L−1 Cibacron Red FN-R treatment closely reproduced the laboratory mineralisation results, with 82 and 86% Dissolved Organic Carbon (DOC) removal, respectively. Nevertheless, the use of sunlight with the CPC photo-reactor increased the degradation rates allowing the reduction of Fe (II) concentration from 10 to 2 mg L−1 (Procion Red H-E7B) and from 20 to 5 mg L−1 (Cibacron Red FN-R) without yield loses. Carboxylic acids, SO42−, NH4+ and NO3− generation was monitored along with dye mineralisation. Finally, in the combined photo-Fenton/biological system, reagents doses of 5 mg L−1 Fe (II) and 225 mg L−1 H2O2 for Cibacron Red FN-R and 2 mg L−1 Fe (II) and 65 mg L−1 H2O2 for Procion Red H-E7B were enough to generate biodegradable solutions that could be fed to the IBR, even improving bench-scale results.

Keywords
Immobilised Biomass Reactor; Photo-Fenton; Pilot plant; Reactive dyes; Sunlight
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 195, Issues 2–3, 15 April 2008, Pages 205–214
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us