Authors
1
Assistant Professor, Department of Civil Engineering, Faculty of Engineering and Technology, Shahid Ashrafi Esfahani University, Isfahan, Iran.
2
Master's degree in Civil Engineering, Water and Hydraulic Structures, Shahid Ashrafi Esfahani University, Isfahan, Iran.
Abstract
Dairy industries are high consumers of water, most of which is discharged as wastewater. This study was conducted by constructing a pilot system and performing a laboratory-scale investigation on the removal of organic matter based on carbon in ice cream manufacturing industries over one month using the electrocoagulation process. The reference samples tested were taken from the effluent of the equalization unit of the Mehr ice cream factory located in the Isfahan J Industrial Town. In this research, the variables COD, TSS, and BOD concentrations were respectively 8700, 2900, and 6200 mg/L at reaction times of 15, 30, 45, and 60 minutes and pH values of 3, 5, 7, and 9 with current intensities of 0.75, 1.5, 2.25, and 3 amperes. These were evaluated in four electrode arrangements: iron, aluminum, iron and aluminum with equal ratios, and iron to aluminum in a 1:2 ratio as the anode electrode. The results showed that the highest removal efficiencies for COD, BOD, and TSS were at pH 3, with a reaction time of 60 minutes, using a combined iron and aluminum electrode with equal numbers, and a current intensity of 2.25 amperes, achieving removal rates of 89.3%, 95.1%, and 82.5%, respectively.
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