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Engineering Review : International journal for publishing of original researches from the aspect of structural analysis, materials and new technologies in the field of mechanical engineering, shipbuilding, fundamental engineering sciences, computer sciences, electrical engin, Vol. 42 No. 2, 2022.

Original scientific paper

https://doi.org/10.30765/er.1734

The effects of ultrasound and electrocoagulation on removal of manganese from wastewater

Hana Posavcic orcid id orcid.org/0000-0001-6555-482X ; Center of Faculty of Civil Engineering, Ul. Sveti Duh 129, 10000, Zagreb, Croatia
Drazen Vouk ; Water Research Department, Faculty of Civil Engineering, University of Zagreb, Fra Andrije Kacica-Miosica 26, 10000 Zagreb, Croatia
Ivan Halkijevic ; Water Research Department, Faculty of Civil Engineering, University of Zagreb, Fra Andrije Kacica-Miosica 26, 10000 Zagreb, Croatia

Full text: english pdf 466 Kb

page 50-58

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Abstract

In this paper the effect of ultrasound and electrocoagulation on the removal of manganese from synthetic wastewater was investigated. It was shown that 20 kHz ultrasound alone is not very efficient for manganese removal, but it enhances the efficiency of electrocoagulation. It was also shown that settling has a great effect on the electrocoagulation process because it stabilizes the flocs. A total of four laboratory-scale experiments were conducted, and the optimal experiment included 10 minutes of ultrasound and 10 minutes of electrocoagulation with iron electrodes. Under these conditions, 89.0 % of the manganese was removed with an operating cost of 0.13 EUR/mg Mn. Adding the cost of replacing the immersed ultrasonic probe, the total operating cost increased 3000-fold, making the immersed ultrasonic probe method unviable for large-scale application.

Keywords

electrocoagulation; manganese removal; ultrasound; wastewater treatment

Hrčak ID:

281784

URI

https://hrcak.srce.hr/281784

Publication date:

21.2.2022.

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