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Application of electrocoagulation devices for reducing ammonium concentrations

Goran Lončar   ORCID icon orcid.org/0000-0002-6466-3677 ; Faculty of Civil Engineering, University of Zagreb, Zagreb, Croatia
Ivan Halkijević   ORCID icon orcid.org/0000-0003-0694-3993 ; Faculty of Civil Engineering, University of Zagreb, Zagreb, Croatia
Hana Posavčić   ORCID icon orcid.org/0000-0001-6555-482X ; Faculty of Civil Engineering, University of Zagreb, Zagreb, Croatia
Ivica Ban   ORCID icon orcid.org/0000-0002-2297-9008 ; Faculty of Civil Engineering, University of Zagreb, Zagreb, Croatia

Puni tekst: engleski, pdf (933 KB) str. 129-142 preuzimanja: 11* citiraj
APA 6th Edition
Lončar, G., Halkijević, I., Posavčić, H. i Ban, I. (2019). Application of electrocoagulation devices for reducing ammonium concentrations. Hrvatske vode, 27 (108), 129-142. Preuzeto s https://hrcak.srce.hr/223140
MLA 8th Edition
Lončar, Goran, et al. "Application of electrocoagulation devices for reducing ammonium concentrations." Hrvatske vode, vol. 27, br. 108, 2019, str. 129-142. https://hrcak.srce.hr/223140. Citirano 08.12.2019.
Chicago 17th Edition
Lončar, Goran, Ivan Halkijević, Hana Posavčić i Ivica Ban. "Application of electrocoagulation devices for reducing ammonium concentrations." Hrvatske vode 27, br. 108 (2019): 129-142. https://hrcak.srce.hr/223140
Harvard
Lončar, G., et al. (2019). 'Application of electrocoagulation devices for reducing ammonium concentrations', Hrvatske vode, 27(108), str. 129-142. Preuzeto s: https://hrcak.srce.hr/223140 (Datum pristupa: 08.12.2019.)
Vancouver
Lončar G, Halkijević I, Posavčić H, Ban I. Application of electrocoagulation devices for reducing ammonium concentrations. Hrvatske vode [Internet]. 2019 [pristupljeno 08.12.2019.];27(108):129-142. Dostupno na: https://hrcak.srce.hr/223140
IEEE
G. Lončar, I. Halkijević, H. Posavčić i I. Ban, "Application of electrocoagulation devices for reducing ammonium concentrations", Hrvatske vode, vol.27, br. 108, str. 129-142, 2019. [Online]. Dostupno na: https://hrcak.srce.hr/223140. [Citirano: 08.12.2019.]
Puni tekst: hrvatski, pdf (933 KB) str. 129-142 preuzimanja: 12* citiraj
APA 6th Edition
Lončar, G., Halkijević, I., Posavčić, H. i Ban, I. (2019). Primjena elektrokoagulacijskog uređaja s ciljem smanjenja koncentracije amonijaka. Hrvatske vode, 27 (108), 129-142. Preuzeto s https://hrcak.srce.hr/223140
MLA 8th Edition
Lončar, Goran, et al. "Primjena elektrokoagulacijskog uređaja s ciljem smanjenja koncentracije amonijaka." Hrvatske vode, vol. 27, br. 108, 2019, str. 129-142. https://hrcak.srce.hr/223140. Citirano 08.12.2019.
Chicago 17th Edition
Lončar, Goran, Ivan Halkijević, Hana Posavčić i Ivica Ban. "Primjena elektrokoagulacijskog uređaja s ciljem smanjenja koncentracije amonijaka." Hrvatske vode 27, br. 108 (2019): 129-142. https://hrcak.srce.hr/223140
Harvard
Lončar, G., et al. (2019). 'Primjena elektrokoagulacijskog uređaja s ciljem smanjenja koncentracije amonijaka', Hrvatske vode, 27(108), str. 129-142. Preuzeto s: https://hrcak.srce.hr/223140 (Datum pristupa: 08.12.2019.)
Vancouver
Lončar G, Halkijević I, Posavčić H, Ban I. Primjena elektrokoagulacijskog uređaja s ciljem smanjenja koncentracije amonijaka. Hrvatske vode [Internet]. 2019 [pristupljeno 08.12.2019.];27(108):129-142. Dostupno na: https://hrcak.srce.hr/223140
IEEE
G. Lončar, I. Halkijević, H. Posavčić i I. Ban, "Primjena elektrokoagulacijskog uređaja s ciljem smanjenja koncentracije amonijaka", Hrvatske vode, vol.27, br. 108, str. 129-142, 2019. [Online]. Dostupno na: https://hrcak.srce.hr/223140. [Citirano: 08.12.2019.]

Sažetak
The efficiency of an electrocoagulation (EC) device in the treatment procedure of wastewater in treating wastewater loaded with increased ammonium concentrations was analysed. The EC treatment optimisation procedure was carried out using measurements on the pilot device and a 3D numerical model of flow and transport. During the analyses, the flow through the reactors with iron (Fe) and aluminium (Al) electrodes was varied, including initial NaCl concentrations. Aside from the ammonium concentration (measured via NH4-N), the changes in the concentrations of nitrates (NO3-N), dissolved oxygen (DO), aluminium (Al3+) and chlorides (Cl-) as well as the changes in water temperature and pH in the in the chamber of the EC device were also monitored. Additionally, flow velocities were measured in a suitable number of positions.
By using a 3D numerical model, the flow fields and concentrations of primary process variables (NH4-N and NO3-N) in the process of their transport were determined. The model parameterization relies on the measurement results.
The results of the conducted research showed that the treatment efficiency primarily depends on the initial NaCl concentration, followed by the flow through the reactors while the selection of the electrodes’ material (Fe or Al) plays a less significant role. At the flow through the reactor’s electrodes of 0.03 dm s-1, applied current density of 150 A m-2 and initial NaCl concentration of 2 g dm-3, a reduction of ammonium concentration NH4-N of 36 % (Al electrode) i.e. 17 % (Fe electrode) was achieved after 120 minutes of the electrode operation. The increase in the nitrate concentration (NO3-N) in the stated conditions equalled 81 % (Al electrode) i.e. 19 % (Fe electrode).

Ključne riječi
electrocoagulation; pilot device; numerical model; ammonium

Hrčak ID: 223140

URI
https://hrcak.srce.hr/223140

[hrvatski]

Posjeta: 47 *