Electro-oxidation and chemical oxidation treatment of sugar industry wastewater with ferrous material: An investigation of physicochemical characteristic of sludge

The environmental impact of the sugar industry waste in Sudan

The purpose of this study was to investigate the impact of Sudanese sugar manufacturing waste on the communities surrounding the industries. The study employed a cross-sectional survey in which 311 respondents living in factory areas. The selected sugar industries included Kenana, Guneid, Halfa, Sinnar, Assalaya, and White Nile. Data were analyzed using SPSS version 19. Descriptive statistics, nonparametric statistics, and logistic regression were employed. The results showed that wastewater discharge has a significant (P < 0.05) effect on community health. Respondents indicated that the waste creates an ideal environment for parasites to reproduce, off-odors to develop, and ultimately contamination of water. A multinomial logistic regression model showed that wastewater (i.e., off-odors and mosquitoes) have significant (P 0.05) influences on causing health risks (i.e., malaria) to people living around sugar factories. The study also revealed that the lack of sugar industry wastewater management has significantly affected crop and animal production. The suspended particles and bagasse fly were significant (P 0.05) in causing eye and respiratory system diseases in the region. Health services provided by the industries significantly (P = 0.05) impacted community satisfaction. In this regard, the study designed a framework for enhanced handling the industrial waste to be adopted by the Sudanese sugar industry decision-makers. A framework was developed to reduce the impact of waste to the lowest possible level by improving management strategies sufficiently to minimize its impact.

Phosphate and Nitrate Removal from Coffee Processing Wastewater Using a Photoelectrochemical Oxidation Process

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.

Wastewater Treatment Using a Photoelectrochemical Oxidation Process for the Coffee Processing Industry Optimization of Chemical Oxygen Demand (COD) Removal Using Response Surface Methodology

The elimination of organic compounds in coffee processing effluent utilizing electrochemical oxidation (ECO) as well as a combination of electrochemical oxidation (ECO) and ultraviolet and hydrogen peroxide (UV/H2O2) was explored. Then, the percentage reduction of chemical oxygen demand (COD) was investigated. The effect of different experimental factors such as solution pH, sodium chloride (NaCl) concentration, calcium chloride (CaCl2) concentration, electric current, electrolysis duration, and hydrogen peroxide dosage on the percent removal efficiency of the hybrid electrochemical oxidation (ECO) with the ultraviolet and hydrogen peroxide (UV/H2O2) process has been investigated. The response surface methodology (RSM) based on central composite design (CCD) was used to organize the trial runs and optimize the results. The hybrid electrochemical oxidation (ECO) with the ultraviolet and hydrogen peroxide (UV/H2O2) process removed 99.61% of the chemical oxygen demand (COD) with a low power usage of 1.12 kWh/m3 compared to the other procedures, according to the experimental data analysis. These findings were obtained with a pH of 7, a current of 0.40 A, 1.5 g of CaCl2, and a total electrolysis period of 40 minutes. When it came to eliminating organic compounds from coffee manufacturing effluent, CaCl2 outperformed NaCl. Analysis of variance (ANOVA) with 95% confidence limits was used to examine the significance of independent variables and their interactions.