Development of Solar Photo-Fenton Process for the Removal of Color, COD, and Turbidity from Institutional Wastewater
Andualem Arka,
Perumal Asaithambi,
Seifu Kebede Debela
Issue:
Volume 7, Issue 2, June 2022
Pages:
26-35
Received:
19 March 2022
Accepted:
18 April 2022
Published:
26 April 2022
Abstract: In recent years, hard research has been aimed to develop effective technology for the treatment of wastewater and industrial effluent containing organic/inorganic contaminants. Amongst several technologies, the advanced oxidation processes (AOPs) recently have played a major role in the treatment of wastewater. In this study, the treatment of institutional wastewater by solar-photo-Fenton (UV/Fe2+/H2O2) process based on AOPs was examined in terms of % color, % turbidity, and % COD removal. The solar-UV/Fe2+/H2O2 process has revealed a higher removal of color (91%), turbidity (90%), and COD (86%) than the other processes. The effect of various experimental parameters such as hydrogen peroxide (H2O2) concentration (0.25 to 1.25 g/L) and Ferrous ion (Fe2+) concentration (0.005 to 0.12 g/L), initial pH (2 to 10), reaction time (30 to 180 min) on the color, turbidity and COD removal has been studied to find out the optimum conditions leading to maximum removal efficiency of the solar UV/Fe2+/H2O2 process. The best results of the solar UV/Fe2+/H2O2 process of institutional wastewater treatment have been found using 0.75 g/L of H2O2, 0.045 g/L of Fe2+, pH of 4, after 120 min of reaction time. The present study revealed that the solar-UV/Fe2+/H2O2 process in an AOPs was well efficient in the institutional wastewater treatment, accomplishing a higher pollutant removal rate. The solar-UV/Fe2+/H2O2 process is an effective treatment technique for the removal of pollutants from institutional wastewater.
Abstract: In recent years, hard research has been aimed to develop effective technology for the treatment of wastewater and industrial effluent containing organic/inorganic contaminants. Amongst several technologies, the advanced oxidation processes (AOPs) recently have played a major role in the treatment of wastewater. In this study, the treatment of insti...
Show More
Effect of Cow Dung to Maize Silage Mix Ratios and Temperature Variation on Biogas Production in Laboratory Batch Digester
Monyluak Makaj Yai Chol,
Nicasio Maguu Muchuka,
Daudi Nyaanga
Issue:
Volume 7, Issue 2, June 2022
Pages:
36-47
Received:
28 March 2022
Accepted:
20 April 2022
Published:
10 May 2022
Abstract: Optimization of biogas production from a given substrate and digester is an issue that needs to be addressed during the development of anaerobic digestion. To maximize the biogas production rate, the operating parameters that influence anaerobic digestion must be controlled and monitored. This research was carried out using a 0.15 m3 laboratory digester. The study evaluated the effect of cow dung and maize silage mix ratios (1:1, 1:3, and 3:1) on biogas production which were compared to their pure substrates at a constant temperature of 20°C. The temperatures (20°C, 25°C, and 30°C) were then evaluated using the optimal mix ratio of 3:1 as feedstock. The Temperature of the digester was controlled and monitored using Programmable Temperature Controller (Multispan UTC 421) and the (PLC) running on SIEMENS LOGO. The mix ratios and temperatures showed a significant effect on biogas production (P≤0.05) with mix ratios of 3:1 and 1:1 improving biogas production by 31.24% and 15.52% respectively compared to cow dung. The temperatures of 25°C and 30°C increased biogas by 26.99% and 47.35% and methane increased by 3.92% and 11.76% respectively compared to the mesophilic temperature of 20°C. The study thus, recommends a mix ratio of 3:1 and the optimal temperature of 30°C for a 0.15 m3 laboratory temperature-controlled fixed-dome anaerobic digester of cow dung and maize silage as a substrate when fed as a batch reactor.
Abstract: Optimization of biogas production from a given substrate and digester is an issue that needs to be addressed during the development of anaerobic digestion. To maximize the biogas production rate, the operating parameters that influence anaerobic digestion must be controlled and monitored. This research was carried out using a 0.15 m3 laboratory dig...
Show More
