Evaluation of toxicity reduction, mineralization, and treatability of phenolic wastewater treated with combined system of catalytic ozonation process / biological reactor (SBR)

Dadban Shahamat, Y; Farzadkia, M; Nasseri, S; Mahvi, A.H; Gholami, M; Esrafily, A

Volume 8, Issue 3 (12-2015) ijhe 2015, 8(3): 331-344 | Back to browse issues page

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Dadban Shahamat Y, Farzadkia M, Nasseri S, Mahvi A, Gholami M, Esrafily A. Evaluation of toxicity reduction, mineralization, and treatability of phenolic wastewater treated with combined system of catalytic ozonation process / biological reactor (SBR). ijhe 2015; 8 (3) :331-344
URL: http://ijhe.tums.ac.ir/article-1-5431-en.html

Evaluation of toxicity reduction, mineralization, and treatability of phenolic wastewater treated with combined system of catalytic ozonation process / biological reactor (SBR)

Y Dadban Shahamat ^*

¹, M Farzadkia²

, S Nasseri³

, A.H Mahvi⁴

, M Gholami²

, A Esrafily²

1- Department of Environmental Health Engineering, Faculty of Public Health, Golestan University of Medical Sciences, Gorgan, Iran, Environmental Health Research Center, Golestan University of Medical Sciences, Gorgan, Iran , ydadban@gmail.com
2- Department of Environmental Health Engineering, Faculty of Public Health, Iran University of Medical Sciences, Tehran, Iran
3- Department of Environmental Health Engineering, Faculty of Public Health, Tehran University of Medical Sciences, Tehran, Iran, Center for water Quality Research (CWQR), Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran
4- Department of Environmental Health Engineering, Faculty of Public Health, Tehran University of Medical Sciences, Tehran, Iran, Center for Solid Waste Research (CSWR), Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran

Abstract: (6099 Views)

Background and Objectives: Phenol is one of the industrial pollutants in wastewaters, which due to its toxicity for biological systems various pretreatment processes have been used for its detoxification. In this study, the combination of catalytic ozonation process (COP) and sequencing batch reactor (SBR) were used for detoxification of these types of wastewaters.

Materials and Methodology: In this study, the effect of COP on phenol degradation, COD removal, and detoxification of wastewater was investigated. To determine the acute toxicity of effluents and identification of intermediate compounds produced in COP, bioassay using Daphnia Magna and GC / MS were used, respectively. Then, phenol and COD removal of pretreated wastewater was investigated in SBR.

Results: It was found that under optimal conditions in COP (time = 60 min), the concentrations of phenol and COD reduced from 500 and 1162 to 7.5 and 351 mg/L respectively and pretreated effluent toxicity (TU = 36), after rising in the initial stage of reaction, effectively reduced at the end of process (TU=2.3). the integration of this process with SBR could decreased the COD and phenol concentration less than the detectable range by HPLC.

Conclusion: Results showed that COP has a high effect on biodegradability, detoxification, and mineralization of phenol and combination of COP with SBR process can effectively treat wastewaters containing phenol.

Keywords: Bioassay, Catalytic ozonation, Magnetic activated carbon, Pheno, SBR

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Type of Study: Research | Subject: wastewater
Received: 2015/03/18 | Accepted: 2015/08/15 | Published: 2015/12/28