alexa Removal of Methyl Orange in Aquaculture Water by Spray-Coated TiO<sub>2</sub> Photocatalysis | OMICS International | Abstract
ISSN: 2157-7048

Journal of Chemical Engineering & Process Technology
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Research Article

Removal of Methyl Orange in Aquaculture Water by Spray-Coated TiO2 Photocatalysis

Wen Zhao1, Yangyang Zhang2, Laura C. Rodriguez-Gonzalez2, Fei Zhong3, Sarina J Ergas2 and Norma A Alcantar1*
1Department of Chemical & Biomedical Engineering, University of South Florida, Tampa FL, USA
2Department of Civil & Environmental Engineering, University of South Florida, Tampa, FL, USA
3School of Life Sciences, Nantong University, Nantong, Jiangsu, P.R. China
Corresponding Author : Norma A. Alcantar
Department of Chemical&Biomedical Engineering
University of South Florida
Tampa FL, USA
Tel: 8139748009
E-mail: [email protected]
Received June 11, 2015; Accepted July 15, 2015; Published July 22, 2015
Citation: Zhao W, Zhang Y, Rodriguez-Gonzalez LC, Zhong F, Ergas SJ, et al. (2015) Removal of Off-Flavor Compounds in Aquaculture Water by Spray-Coated TiO2 Photocatalysis. J Chem Eng Process Technol 6:237. doi:10.4172/2157-7048.1000237
Copyright: © 2015 Zhao W, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

A major challenge for aquaculturists using recirculating aquaculture systems is the accumulation of off-flavor compounds, such as geosmin and 2-methylisoborneol (MIB), in the farmed fish. This work investigates the removal of off-flavor compounds in aquaculture systems using titanium dioxide (TiO2) photocatalysis. Due to concerns of TiO2 nanoparticles on fish, TiO2 was immobilized onto glass plates. A photodegradation reactor that incorporated the TiO2 coated plates was designed and operated as a recirculating system. Methyl orange was used as a surrogate compound for geosmin and MIB. In parameter optimization experiments, a flow rate of 2.5 mL/s, a water depth of 2 mm and a TiO2 dosage of 0.25 mg/cm3 were found to provide a high methyl orange removal rate constant of 0.77/h, when the compound was supplied in a solution made in deionized (DI) water. Due to the presence of natural organic matter (NOM) in the RAS water, the methyl orange removal rate constant decreased to 0.44/h. The results indicate that although NOM interferes with the photocatalysis process, if an extended reaction time is applied acceptable removal efficiencies can be achieved. This work is currently being applied in a photocatalysis study on removal of off-flavor compounds in RAS.

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