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Article

Removal of Microcystis aeruginosa through the Combined Effect of Plasma Discharge and Hydrodynamic Cavitation

1
Institute of Botany, Czech Academy of Sciences, Lidická 25/27, CZ-602 00 Brno, Czech Republic
2
V. Kaplan Department, Faculty of Mechanical Engineering, Brno University of Technology, 601 90 Brno, Czech Republic
3
Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, CZ-611 37 Brno, Czech Republic
*
Author to whom correspondence should be addressed.
Water 2020, 12(1), 8; https://doi.org/10.3390/w12010008
Received: 19 November 2019 / Revised: 12 December 2019 / Accepted: 13 December 2019 / Published: 18 December 2019
(This article belongs to the Section Wastewater Treatment and Reuse)
Cyanobacterial water blooms represent toxicological, ecological and technological problems around the globe. When present in raw water used for drinking water production, one of the best strategies is to remove the cyanobacterial biomass gently before treatment, avoiding cell destruction and cyanotoxins release. This paper presents a new method for the removal of cyanobacterial biomass during drinking water pre-treatment that combines hydrodynamic cavitation with cold plasma discharge. Cavitation produces press stress that causes Microcystis gas vesicles to collapse. The cyanobacteria then sink, allowing for removal by sedimentation. The cyanobacteria showed no signs of revitalisation, even after seven days under optimal conditions with nutrient enrichment, as photosynthetic activity is negatively affected by hydrogen peroxide produced by plasma burnt in the cavitation cloud. Using this method, cyanobacteria can be removed in a single treatment, with no increase in microcystin concentration. This novel technology appears to be highly promising for continual treatment of raw water inflow in drinking water treatment plants and will also be of interest to those wishing to treat surface waters without the use of algaecides. View Full-Text
Keywords: cyanobacterial bloom; water treatment; drinking water; surface water; cold plasma cyanobacterial bloom; water treatment; drinking water; surface water; cold plasma
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MDPI and ACS Style

Maršálek, B.; Maršálková, E.; Odehnalová, K.; Pochylý, F.; Rudolf, P.; Stahel, P.; Rahel, J.; Čech, J.; Fialová, S.; Zezulka, Š. Removal of Microcystis aeruginosa through the Combined Effect of Plasma Discharge and Hydrodynamic Cavitation. Water 2020, 12, 8. https://doi.org/10.3390/w12010008

AMA Style

Maršálek B, Maršálková E, Odehnalová K, Pochylý F, Rudolf P, Stahel P, Rahel J, Čech J, Fialová S, Zezulka Š. Removal of Microcystis aeruginosa through the Combined Effect of Plasma Discharge and Hydrodynamic Cavitation. Water. 2020; 12(1):8. https://doi.org/10.3390/w12010008

Chicago/Turabian Style

Maršálek, Blahoslav, Eliška Maršálková, Klára Odehnalová, František Pochylý, Pavel Rudolf, Pavel Stahel, Jozef Rahel, Jan Čech, Simona Fialová, and Štěpán Zezulka. 2020. "Removal of Microcystis aeruginosa through the Combined Effect of Plasma Discharge and Hydrodynamic Cavitation" Water 12, no. 1: 8. https://doi.org/10.3390/w12010008

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