What does this research mean for the field?

Plasma treatment of wastewater can reduce microbial counts by up to 6.1-log 10, particularly influenced by chemical oxygen demand (COD). Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To analyze the parameters influencing the inactivation of microorganisms and viruses in wastewater using plasma treatment.

March 10, 2026Plasma Processes and Polymers0 citationsOpen Access

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Parameters Influencing the Plasma‐Mediated Inactivation of Microorganisms and Viruses in Wastewater

VHVeronika Hahn AEAhmad ElsayedUniversitätsmedizin Greifswald MBMartina BalazinskiLeibniz Institute for Plasma Science and Technology

Key Points

To analyze the parameters influencing the inactivation of microorganisms and viruses in wastewater using plasma treatment.
Evaluated plasma treatment efficacy on raw wastewater samples.
Measured microbial count reduction and determined chemical parameters like COD, pH, nitrite and nitrate.
Analyzed the relationship between COD levels and bacterial inactivation using synthetic wastewater with antibiotic-resistant E. coli.
Assessed inactivation effects on virus surrogates Phi6 and MS2.
Achieved a microbial count reduction of up to 2.8-log10 in untreated wastewater.
Observations showed that low COD levels increased bacterial inactivation rates up to 6.1-log10.
Preliminary results indicated similar inactivation effects on Phi6 and MS2 bacteriophages.

Abstract

ABSTRACT Pathogenic microorganisms and viruses in water pose an environmental risk demanding for effective remediation tools like physical plasma. However, parameters influencing its efficiency are mostly descriptive. Plasma treatment of raw wastewater resulted in a reduced microbial count by up to 2.8‐log 10 . This wastewater was used to determine, e.g., the chemical oxygen demand (COD), pH‐value, nitrite and nitrate. Particularly, the COD‐influence on microbial inactivation was analyzed by synthetic wastewater (organism: antibiotic‐resistant Escherichia coli ). A low COD resulted in a high bacterial inactivation (up to 6.1‐log 10 ). Preliminary data revealed similar effects for virus‐containing solutions (Phi6 and MS2 bacteriophages as surrogates for SARS‐CoV‐2). This information is needed to estimate the antimicrobial and antiviral efficacy of plasma for the development of effective remediation processes.

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Cite This Study

Hahn et al. (Sun,) studied this question.

synapsesocial.com/papers/69af95b470916d39fea4d86d https://doi.org/https://doi.org/10.1002/ppap.70146

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