Plasma-Treated Water Has Cut Pathogen Risks
A new water treatment method could help remove Salmonella from fresh produce without relying on chemical disinfectants.
Updated on Oct. 6, 2026 in Nutrition
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Researchers have developed a plasma-treated nanobubble water technology capable of inactivating foodborne pathogens like Salmonella Typhimurium. This chemical-free approach may offer a new way to ensure safety during the postharvest washing of produce.
Why it matters
This technology addresses the critical challenge of preventing cross-contamination in wash water, which can otherwise spread bacteria across batches of produce. By removing the need for chemical disinfectants, this process may provide a safer alternative for standard industry sanitation.
In laboratory testing, the plasma-treated nanobubble water successfully reduced Salmonella Typhimurium in water to levels below detection limits within 10 seconds. On tomato surfaces, the method achieved a 2.32 log CFU g reduction within 1 minute of exposure.
The details
The system uses plasma-gas injection to infuse water with nanobubbles that carry reactive antimicrobial species. Ozone serves as the primary agent, which then undergoes decomposition to generate hydroxyl radicals that damage bacterial cells. This chemical-free reaction effectively destroys pathogens on produce surfaces and within the wash water itself.
Timeline
10 s for complete microbial inactivation in water.
1 min for surface-associated bacteria reduction on tomatoes.
Health Landscape
The food safety industry currently relies heavily on chemical agents to mitigate the risk of pathogen spread during postharvest processing. This plasma-based approach moves toward a non-chemical intervention, potentially setting a new standard for how produce is sanitized globally.
While this innovation is designed for commercial facilities, advancements in postharvest hygiene help reduce the cumulative risk of foodborne illnesses reaching the consumer. If you have concerns about produce safety, continuing to follow standard home-washing practices remains an important habit.
The takeaway
The use of plasma-treated water could significantly decrease the prevalence of pathogens like Salmonella on produce. Consumers should maintain a habit of thoroughly washing fruits and vegetables at home as a primary defense against foodborne bacteria.
Further reading
For more on food safety and modern food processing, visit the Nutrition section.
Source note: This article includes information reported by Nature.
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