Abstract:
Electrochemical technology for treating wastewater provide number of advantages over traditio
nal treatment processes, including environmental compatibility, energy efficiency, adaptability,
safety, selectivity, ease of scale up, mechanization, cost effectiveness, and excellent settling and
filterability. In this study, the pulsed electrochemical method is a hopeful treatment strategy
because of its high effectiveness, cheap and speedy outcomes. The aim of this research is to inves
tigate the effect of independent variable to remove contaminants from wet coffee processing indu
stry. The independent variables such as pH, time, electric current, and electrolyte dosage on the
removal efficiency of Chemical Oxygen Demand (COD), % Color, % Turbidity, phosphate,
nitrate, and power consumption were investigated by the pulsed electrochemical process
treatment method and the potential of these methods was obtained as COD (98.75 %), color
(99.92 %), turbidity (99.00 %), phosphate (99.02 %), and nitrate (98.83 %), with a power
consumption of 0.971 kWh/m3
has a high removal efficiency depending on the result. The
optimum values for removal was obtained using response surface methodology (RSM) Vis
central compost design (CCD): pH 7, electrolyte dosage of 0.75g, electrolysis time of 45min, and
current of 0.45Amp). Analysis of variance (ANOVA) with 95 percent confidence limits was used
to determine the significance of independent variables and their interactions. As a result, the
pulsed electrochemical process (PECP) with CaCl2 as an electrolyte is an effective treatment
technique for pollutant removal, and it was discovered that increasing the electrolyte charge
from +1 to +2 increases pollutant removal and decreases voltage, which was effective for
pollutant removal. Pulsed electrochemical process is an effective treatment particularly to wet
coffee wastewater.
