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ISSN: 2157-7587

Hydrology: Current Research
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Research Article

Wastewater Containing 1,2-Dihydro-2,2,4-Trimethylquinoleyn Treated by Electrolysis and Respirometric Method

Thelma Helena Inazaki1, Peterson Bueno de Moraes2, Gisela Regis1, Paulo Renato Matos Lopes1, Renato Nallin Montagnolli1, Antonio Carlos Simões Piao3 and Ederio Dino Bidoia1*
1Department of Biochemistry and Microbiology, IB, UNESP – Univ Estadual Paulista, Rio Claro, Brazil
2Department of Technology in Environmental Management – DTSA, FT/UNICAMP, Limeira, Brazil
3DEMAC, IGCE, UNESP – Univ Estadual Paulista, Rio Claro, Brazil
Corresponding Author : Dr. Ederio Dino Bidoia
Department of Biochemistry and Microbiology
IB, UNESP – Univ Estadual Paulista
Avenida 24 A, 1515 – Bela Vista
CEP: 13506-900; Rio Claro-SP, Brazi
Tel: (55) 19-35264191
Fax: (55) 19-35264176
E-mail: [email protected]
Received August 24, 2010; Accepted September 28, 2010; Published October 01, 2010
Citation: Inazaki TH, de Moraes PB, Regis G, Matos Lopes PR, Montagnolli RN, et al. (2010) Wastewater Containing 1,2-Dihydro-2,2,4-Trimethylquinoleyn Treated by Electrolysis and Respirometric Method. J Waste Water Treatment Analysis 1:101. doi: 10.4172/2157-7587.1000101
Copyright: © 2010 Inazaki TH, 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

The electrolytic treatment of a real industrial effluent and simulated wastewater containing the 1,2-dihydro- 2,2,4-trimethylquinoleyn compound (Naugard Q®) had been investigated in order to improve the wastewater biodegradability. The electrolysis was carried out in a batch electrolytic cell using 70TiO2/30RuO2 electrodes (DSA® anode). After electrochemical treatment, wastewaters were evaluated in terms of Naugard Q® concentration, UV-visible spectrophotometry and biodegradation. Further analyses were conducted in simulated wastewater by gas chromatography and the biodegradation process was monitored using respirometric flasks. Both real effluent and simulated wastewater presented a decrease in Naugard Q® concentration. The simulated wastewater electrolytic treatment provided concentration reduction of Naugard Q® about 52.04% after 60 min, whereas real effluent concentration was reduced by 62.60% after 40 minutes. Furthermore, UV-visible spectra and gas chromatograms presented significant alterations in molecular structure of the compound. After 30 min electrolysis, an increase in simulated wastewater biodegradation was observed. In real effluent, the biodegradation response was faster, as more CO2 was produced in assays that underwent 10 and 25 minutes of electrolytic treatment. This result is probably related to modifications in Naugard Q® molecular structure. It was concluded that the electrolytic treatment followed by bioremediation could be an alternate treatment to degrade this compound.

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