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Mass Production of Plasma Activated Water: Case Studies of Its Biocidal Effect on Algae and Cyanobacteria
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SYSNO ASEP 0542760 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Mass Production of Plasma Activated Water: Case Studies of Its Biocidal Effect on Algae and Cyanobacteria Author(s) Čech, J. (CZ)
Sťahel, P. (CZ)
Ráhel’, J. (CZ)
Prokeš, L. (CZ)
Rudolf, P. (CZ)
Maršálková, Eliška (BU-J) ORCID, SAI
Maršálek, Blahoslav (BU-J) ORCID, SAIArticle number 3167 Source Title Water. - : MDPI
Roč. 12, č. 11 (2020)Number of pages 18 s. Language eng - English Country CH - Switzerland Keywords plasma activated water ; electrical discharges with liquids ; cyanobacteria ; decontamination Subject RIV DJ - Water Pollution ; Quality OECD category Mechanical engineering R&D Projects GA19-10660S GA ČR - Czech Science Foundation (CSF) SS01020006 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Method of publishing Open access Institutional support BU-J - RVO:67985939 UT WOS 000594336200001 EID SCOPUS 85096364400 DOI 10.3390/w12113167 Annotation Efficient treatment of contaminated water in industrially viable volumes is still a challenging task. The hydrodynamic cavitation plasma jet (HCPJ) is a promising plasma source for industrial-scale generation of biologically active environments at high flow rates of several m(3)/h. The combined effect of a hydro-mechanical phenomenon consisting of hydrodynamic cavitation and electrical discharge in cavitation voids was found to be highly efficient for large-volume generation of reactive oxygen species, ultraviolet (UV) radiation, and electro-mechanical stress in a liquid environment. Here, the persistence of biocidal properties of HCPJ-activated water (i.e., plasma-activated water (PAW)) was tested by the study of algae and cyanobacteria inactivation. Algae and cyanobacteria cultivated in media containing PAW (1:1) were completely inactivated after 72 h from first exposure. The test was performed at a total power input of up to 0.5 kWh/m(3) at the treated liquid flow rate of 1 m(3)/h. A beneficial modification of our previous HCPJ design is described and thoroughly characterized with respect to the changes of hydrodynamic flow conditions as well as discharge performance and its optical characteristics. The modification proved to provide high biocidal activity of the resulting PAW, which confirms a strong potential for further design optimization of this promising water (liquid) plasma source. Workplace Institute of Botany Contact Martina Bartošová, martina.bartosova@ibot.cas.cz, ibot@ibot.cas.cz, Tel.: 271 015 242 ; Marie Jakšová, marie.jaksova@ibot.cas.cz, Tel.: 384 721 156-8 Year of Publishing 2022 Electronic address https://doi.org/10.3390/w12113167
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