Journal
JOURNAL OF WATER PROCESS ENGINEERING
Volume 8, Issue -, Pages 64-74Publisher
ELSEVIER
DOI: 10.1016/j.jwpe.2015.09.006
Keywords
Can manufacturing wastewater; Electrocoagulation; Al electrode; Electrode connection mode; Operating cost
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In this study, treatment of can manufacturing wastewater (CMW) by electrocoagulation (EC) process using aluminium plate electrodes was investigated in a batch mode operation to obtain optimum operating conditions with minimum operating cost. Effects of operating parameters such as current density, operating time and electrode connection modes (monopolar series (MP-S), monopolar parallel (MP-P) and bipolar series (BP-S)) on removal efficiencies of aluminium (125.1 mg/L), zirconium (81.2 mg/L), and phosphate (PO43- - P, 32.1 mg/L), chemical oxygen demand (COD: 850 mg/L) and total organic carbon (TOC: 300 mg/L) from the CMW were evaluated. The results indicated that removal efficiencies of Al, Zr, and phosphate at the optimum conditions (20 A/m(2), 40 min and MP-P electrode connection mode) were determined to be 99.41% for Al, 99.38% for Zr and 99.80% for phosphate, 72% for COD, and 37% for TOC in the wastewater, respectively. In addition, charge density, electrode and energy consumptions, amount of sludge and operating cost at the optimum operating conditions were calculated as 13.196 F/m(3) or 1270.59 C/L, 0.1432 kg/m(3), 1.366 kWh/m(3), 1.674 kg/m(3) and 0.366 (sic)/m(3). The results indicated that the EC process is very effective and efficient process for treatment of the CMW. (C) 2015 Elsevier Ltd. All rights reserved.
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