Electrochemical Removal of Ammonium Nitrogen and COD of Domestic Wastewater using Platinum Coated Titanium as an Anode Electrode

Umesh Ghimire, Min Jang, Sokhee P. Jung, Daeryong Park, Se Jin Park, Hanchao Yu and Sang-Eun Oh
Additional contact information
Umesh Ghimire: Department of Biological Environment, Kangwon National University, 192-1 Hyoja-2-dong, Gangwondo, Chuncheon 200-701, Korea
Min Jang: Department of Environmental Engineering, Kwangwoon University, 20 Kwangwoon-Ro, Nowon-Gu, Seoul 01897, Korea
Sokhee P. Jung: Department of Environment and Energy Engineering, Chonnam National University, Gwangju 61186, Korea
Daeryong Park: Department of Civil and Environmental Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
Se Jin Park: Department of Biological Environment, Kangwon National University, 192-1 Hyoja-2-dong, Gangwondo, Chuncheon 200-701, Korea
Hanchao Yu: Department of Environmental Engineering, Korea Maritime and Ocean University, Busan 49112, Korea
Sang-Eun Oh: Department of Biological Environment, Kangwon National University, 192-1 Hyoja-2-dong, Gangwondo, Chuncheon 200-701, Korea

Energies, 2019, vol. 12, issue 5, 1-13

Abstract: Biological treatment systems face many challenges in winter to reduce the level of nitrogen due to low temperatures. The present work aimed to study an electrochemical treatment to investigate the effect of applying an electric voltage to wastewater to reduce the ammonium nitrogen and COD (chemical oxygen demand) in domestic wastewater. This was done by using an electrochemical process in which a platinum-coated titanium material was used as an anode and stainless steel was used as a cathode (25 cm 2 electrode area/500 mL). Our results indicated that the removal of ammonium nitrogen (NH 4 + –N) and the lowering of COD was directly proportional to the amount of electric voltage applied between the electrodes. Our seven hour experiment showed that 97.6% of NH 4 + –N was removed at an electric voltage of 5 V, whereas only 68% was removed with 3 V, 20% with 1.2 V, and 10% with 0.6 V. Similarly, at 5 V, the removal of COD was around 97.5%. Over the seven hours of the experiment, the pH of wastewater increased from pH 7.12 to pH 8.15 when 5 V was applied to the wastewater. Therefore, electric voltage is effective in the oxidation of ammonium nitrogen and the reduction in COD in wastewater.

Keywords: electrochemical; wastewater; COD; ammonium nitrogen; voltage; anode (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
https://www.mdpi.com/1996-1073/12/5/883/pdf (application/pdf)
https://www.mdpi.com/1996-1073/12/5/883/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:12:y:2019:i:5:p:883-:d:211769

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().