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Olive mill wastewater (OMW) Treatment by hybrid processes of electrocoagulation/catalytic ozonation and biodegradation

Khani, M.R. and Mahdizadeh, H. and Kannan, K. and Kalankesh, L.R. and Kamarehei, B. and Baneshi, M.M. and Shahamat, Y.D. (2020) Olive mill wastewater (OMW) Treatment by hybrid processes of electrocoagulation/catalytic ozonation and biodegradation. Environmental Engineering and Management Journal, 19 (8). pp. 1401-1410.

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Abstract

The olive oil extraction industry is one of the most polluting wastewaters from the food industry, which is considered an important economic activity in the world. The environmental effects of olive wastewater are related to chemical and organic loading, which is resistant to biodegradation processes. The purpose of this study was to determine the efficiency of combined electrocoagulation, catalytic ozonation, to reduce organic load and improve the biodegradability of olive oil sewage. The present study was experimental on a laboratory scale and was done at a batch reactor on actual olive wastewater. The electrocoagulation process was performed using Fe electrodes at a current density of 0.73, 0.5, 0.05A/dm2. The optimal conditions for the electrocoagulation process were obtained at a flow rate of 0.5 A/dm2 for 45 min reaction time, so that the removal efficiency of TOC, COD, and turbidity was 75, 80 and 94, respectively. Then the treated wastewater under these optimal conditions entered the catalytic ozonation process (COP) reactor. In the COP process, the TOC and COD concentrations reached 105 and 210 mg/L after 90 min (44 and 56 removal). Eventually, the effluent was introduced into the biology*ical reactor and the removal efficiency of COD and TOC were investigated. So, the amount of TOC and COD decreased from 105 and 210 mg/L to 22.3 mg/L and 37 mg/L, respectively. As a result, the overall efficiency of the EC/COP/SBR system in removing COD and TOC was 98.4 and 97.2, respectively. The combination of these processes is very effective in comparison with other processes for the treatment of olive sewage. © 2020 Gheorghe Asachi Technical University of Iasi, Romania. All rights reserved.

Item Type: Article
Additional Information: cited By 0
Subjects: QU بیوشیمی
بهداشت عمومی WA > QD Chemistry
بهداشت عمومی WA > بهداشت حرفه ای
بهداشت عمومی WA > بهداشت محیط WA
مقالات نمایه شده محققین دانشگاه در سایت ,Web of Science ,Scopus
Divisions: معاونت تحقیقات و فناوری
Depositing User: GOUMS
Date Deposited: 05 Jan 2021 10:04
Last Modified: 05 Jan 2021 10:04
URI: http://eprints.goums.ac.ir/id/eprint/10907

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