Investigation of coffee processing wastewater treatment by using photo- electro chemical oxidation process

Abstract

Water is a limited natural resource that is essential for human life as well as environmental susta inability. It is both a qualitative and quantitative component of every ecosystem. Water quality, whether utilized for home, irrigation, or recreational reasons, is crucial for health in both develo ping and developed countries around the world. For the treatment of coffee processing wastewat er, photo- electrochemical oxidation process is used, which involves the generation and use of po werful oxidizing species, primarily the hydroxyl radical (OH), for contaminant destruction. This technology, when combined with ultraviolet light and with hydrogen peroxide (UV/H2O2), impro ves the performance of the coffee processing wastewater treatment process. The effect of UV/H2 O2 on an electrochemical process was studied, as well as the effects of various parameters such as PH, time, current, H2O2, and electrolytes. The trial runs and findings were planned using the response surface methodology (RSM) based on Central Composite Design (CCD). Additionally, t he findings were computed and analyzed using Microsoft Excel. The hybrid Photoelectrochemica l oxidation (PECO) with Ultraviolet and Hydrogen peroxide (UV/H2O2) method removed more COD (99.991 %), color (99.898%), nitrate (99.823%), and phosphate (99.982%). These results were obtained at an ideal pH of 7, a current of 0.40 Ampere, 3ml of H2O2 ,1.5g calcium chloride, after 40 minutes of electrolysis and calcium chloride (CaCl2) was the best ectrolyte. In eliminati ng organic compounds from coffee processing wastewater, CaCl2 was more effective than (Sodiu m Chloride) NaCl. 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 combi nation of electrochemical oxidation (ECO), ultraviolet light, and hydrogen peroxide (UV/H2O2) has been shown to be effective treatment techniques for pollutant removal, and it was discovered that combining ultraviolet light with the powerful oxidizing agent hydrogen peroxide could impr ove pollution attenuation