Combined Electrocoagulation and Chemical Coagulation in Treating Brewery Wastewater

被引:23
|
作者
Swain, Kimberly [1 ]
Abbassi, Bassim [1 ]
Kinsley, Chris [2 ]
机构
[1] Univ Guelph, Sch Engn, Guelph, ON N1G 2W1, Canada
[2] Univ Ottawa, Dept Civil Engn, Ottawa, ON K1N 6N5, Canada
关键词
decentralized wastewater; electrocoagulation; brewery wastewater; chemical coagulation; nutrient removal; REMOVAL; PHOSPHATE;
D O I
10.3390/w12030726
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Significant over-strength discharge fees are often imposed on breweries for the disposal of high-strength effluent to sanitary sewers. In this research work, the removal performances of electrocoagulation (EC) compared with operating electrocoagulation and chemical coagulation in sequence (EC-CC) or vice-versa (CC-EC) was examined to determine the capability of treatment in reducing the strength of the wastewater. Optimal operating parameters regarding electrolysis time, initial pH, and applied power were determined in conjunction with nutrient removal performance, electrode consumption and energy usage. Combined EC-CC treatment has been demonstrated to be economically feasible for brewery wastewater applications from an energy consumption perspective due to the efficiency of nutrient removal and the reduction of sewer discharge costs. Treatment by EC-CC at 5 W for 20 min using aluminum electrodes resulted in enhanced and consistent removal efficiencies of 26%, 74%, 76%, and 85% for chemical oxygen demand (COD), reactive phosphorous (RP), total phosphorous (TP) and total suspended solids (TSS), respectively. Energy consumption was the main contributor to operating cost. By considering potential recovered over-strength discharge fees (ODF), EC-CC treatment is economically feasible and beneficial in a brewery wastewater application. The results demonstrated the effectiveness of the CC-EC process to remove phosphorous, organics and solids from brewery wastewater at lower power supply, so that the recovered ODF cost for CC-EC at 5 W-EC is 23% higher than at 10 W-EC.
引用
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页码:1 / 12
页数:12
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