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Modified Electrocoagulation System for Treating Street Food Trucks Wastewater in Egypt
Abstract
In this paper, a modified electrocoagulation system (M-EC) was developed and evaluated for the treatment of street food trucks wastewater (SFCW) in Egypt. A continuous flow electrocoagulation cell with aluminum electrodes was modified by adding a sand filter. The effects of applied voltage (22, 26, and 30 V) and inlet flow rate (1, 3, and 5 L/h) on the cell's performance were investigated to determine the optimal operating conditions. The results showed that the system was effective in removing chemical oxygen demand (COD), total suspended solids (TSS), total fat, oil and grease (FOG) and conductivity (COND) from the wastewater. The maximum removal efficiencies for COD, TSS, FOG and COND were 86%, 99%, 98.9% and 38%, respectively. The system was most effective in removing pollutants from the wastewater in applied voltage 26 V and inlet flowrate 1 L/h. The water quality specifications of the treated SFCW using the M-EC cell at optimum conditions were compared with the Egyptian standard for Characteristics and Criteria of Raw Sewage Water Entering the Public System and Treatment Plants, and it was found that all the indicators of the studied water quality are in conformity with the specifications. At the optimum conditions, the operating cost (OC) was 25 EGP/m3. The modified electrocoagulation system is a promising technology for the treatment of SFCW in Egypt.
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