Reduction of pollutants and disinfection of industrial wastewater by an integrated system of copper electrocoagulation and electrochemically generated hydrogen peroxide.
The objective of this study was to evaluate the effect of copper electrocoagulation and hydrogen peroxide on COD, color, turbidity, and bacterial activity in a mixed industry wastewater. The integrated system of copper electrocoagulation and hydrogen peroxide is effective at reducing the organic and bacterial content of industrial wastewater. The copper electrocoagulation alone reduces COD by 56% in 30 min at pH 2.8, but the combined system reduces COD by 78%, biochemical oxygen demand (BOD5) by 81%, and color by 97% under the same conditions. Colloidal particles are flocculated effectively, as shown by the reduction of zeta potential and the 84% reduction in turbidity and 99% reduction in total solids. Additionally, the total coliforms, fecal coliforms, and bacteria are all reduced by 99%. The integrated system is effective and practical for the reduction of both organic and bacterial content in industrial wastewater.
a Centro Conjunto de Investigación en Química Sustentable, UAEM-UNAM , Toluca , Estado de México , México.
Carlos E
CE
Barrera-Díaz
Bernardo A
BA
Frontana-Uribe
Gabriela
G
Roa-Morales
Bryan W
BW
Bilyeu
D057919:Biological Oxygen Demand Analysis; D003300:Copper / Q000737:chemistry*; D004203:Disinfection / Q000379:methods*; D055664:Electrochemical Techniques; D004755:Enterobacteriaceae / Q000187:drug effects; D005427:Flocculation; D015386:Hazardous Substances / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry* / Q000382:microbiology; D014871:Water Microbiology; D014874:Water Pollutants, Chemical / Q000737:chemistry*
D003300:Copper; D015386:Hazardous Substances; D006861:Hydrogen Peroxide; D062065:Wastewater; D014874:Water Pollutants, Chemical
Disinfection; electrochemical treatment; industrial wastewater; integrated process