Photo-alternating current-electrocoagulation technique: Studies on operating parameters for treatment of industrial wastewater

Perumal Asaithambi; Wendesen Mekonin Desta; Mamuye Busier Yesuf; Mohammed Hussen; Zerihun Asmelash; Dejene Beyene; Selvakumar Periyasamy; Esayas Alemayehu

Scientific African (Jun 2024)

Photo-alternating current-electrocoagulation technique: Studies on operating parameters for treatment of industrial wastewater

Perumal Asaithambi,
Wendesen Mekonin Desta,
Mamuye Busier Yesuf,
Mohammed Hussen,
Zerihun Asmelash,
Dejene Beyene,
Selvakumar Periyasamy,
Esayas Alemayehu

Affiliations

Perumal Asaithambi: Faculty of Civil and Environmental Engineering, Jimma Institute of Technology, Jimma University, Jimma, Po Box - 378, Ethiopia; Corresponding author.
Wendesen Mekonin Desta: Faculty of Civil and Environmental Engineering, Jimma Institute of Technology, Jimma University, Jimma, Po Box - 378, Ethiopia
Mamuye Busier Yesuf: Faculty of Civil and Environmental Engineering, Jimma Institute of Technology, Jimma University, Jimma, Po Box - 378, Ethiopia
Mohammed Hussen: Faculty of Civil and Environmental Engineering, Jimma Institute of Technology, Jimma University, Jimma, Po Box - 378, Ethiopia
Zerihun Asmelash: Faculty of Civil and Environmental Engineering, Jimma Institute of Technology, Jimma University, Jimma, Po Box - 378, Ethiopia
Dejene Beyene: Faculty of Civil and Environmental Engineering, Jimma Institute of Technology, Jimma University, Jimma, Po Box - 378, Ethiopia
Selvakumar Periyasamy: Department of Chemical Engineering, School of Mechanical, Chemical and Materials Engineering, Adama Science and Technology University, Adama 1888, Ethiopia
Esayas Alemayehu: Faculty of Civil and Environmental Engineering, Jimma Institute of Technology, Jimma University, Jimma, Po Box - 378, Ethiopia; Center of Excellence for Water Management, Addis Ababa University, Addis Ababa, Po Box-1176, Ethiopia

Journal volume & issue: Vol. 24
p. e02193

Abstract

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In this investigation, several electrochemical and advanced oxidation processes (AOPs), including photolysis (UV), direct/alternating current-electrocoagulation (DC/AC/EleC), and photo-direct/alternating current-electrocoagulation (UV/DC/AC/EleC) process were examined regarding their capacity in order to reduce the amount of chemical oxygen demand (COD) and color in distillery industrial wastewater (DIW), as well as the effect these factors have on the amount of electricity required to treat the wastewater. Experimental results showed that compared to single UV, DC/EleC, AC/EleC, and hybrid UV/DC/EleC processes, the hybrid UV/AC/EleC process provided excellent color-100 % and COD-100 % removal efficiencies with a lowered usage of energy of 8.54 kWhr m−3. The influence of critical operational variables such as treatment time (30–240 min), photo (8–40 W), pulse duty cycle (0.14–0.86), current (0.15–0.90 Amp), pH (1.50–11.50), chemical oxygen demand (3000–9000 mgL−1), inter electrode spacing (1–4 cm), electrode combination (Fe/Fe, Fe/Al,Al/Fe, Al/Al), and electrolyte concentration (1–5 g L−1) on the efficiency of% color and COD removal, as well as the energy utilization of DIW were examined applying a hybrid UV/AC/EleC method. The synergistic index between UV and the AC/EleC process was also examined and discussed in this work. The UV/AC/EleC technique is the most advantageous choice in comparison to the other approaches since it can be applied to properly and efficiently remove pollutants from wastewater and industrial effluent.

Published in Scientific African

ISSN: 2468-2276 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science
Website: https://www.journals.elsevier.com/scientific-african

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