Abstract:
Water quality, whether utilized for home, irrigation, or recreational reasons, is crucial for health in both developing and developed
countries around the world. For the treatment of nitrate (NO3) and phosphate (PO3) from coffee processing wastewater,
photoelectrochemical oxidation was used. This process is mainly used to destroy pollutants through the production and use of
powerful oxidized species such as hydroxyl radical (OH). It investigated the effects of Uv/H2O2 on electrochemical processes
and the effects of various parameters such as pH, time, current, and electrolytes. The results were calculated and analyzed
using response surface methodology and Microsoft Excel. Hybrid photoelectrochemical oxidation (PECO) using UV and
hydrogen peroxide (UV/H2O2) methods removed nitrates (99.823%) and phosphates (99.982%). These results were obtained
with pH 7, current 0.40 amperes, and 1.5 g calcium chloride after 40 minutes of electrolysis. CaCl2 was more effective in
removing organic compounds from coffee processing wastewater. An analysis of variance (ANOVA) with a 95% confidence
limit was used to determine the significance of the independent variable.
