Researchers Developed Nanobubble Water for Produce Sanitization
A new plasma-treated water method eliminates pathogens on produce without the need for additional chemical disinfectants.
Updated on Oct. 6, 2026 in Nutrition
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Scientists have developed a novel plasma-treated nanobubble water that effectively inactivates Salmonella Typhimurium in wash water. This technique utilizes reactive species to disinfect produce without relying on added chemical agents.
Why it matters
This innovation offers a chemical-free way to prevent pathogen dissemination and cross-contamination during postharvest processing. It addresses critical food safety challenges by neutralizing bacteria in wash water systems.
The treatment reduces surface-associated bacteria by 2.32 log CFU g within 1 minute. Microbial inactivation in water reaches below detection limits of 1.4 log CFU mL in only 10 seconds.
The details
The technology uses plasma-gas injection to produce nanobubbles that deliver reactive species like ozone. As the ozone decomposes, it generates hydroxyl radicals, which work together to eliminate pathogens from the water and tomato surfaces.
Timeline
Salmonella Typhimurium inactivation in water occurred within 10 seconds.
Reduction of surface-associated bacteria on tomatoes was achieved within 1 minute.
The Big Picture
This development follows a pattern set by industry responses to the 2018 Cyclospora outbreak linked to McDonald's salads. It represents an effort to mitigate pathogen risks that have historically triggered large-scale supply chain recalls.
By providing a chemical-free disinfection method, this technology helps reduce consumer exposure to harmful bacteria on raw produce. It may eventually lead to safer food handling practices at the retail and processing levels.
The takeaway
This technology demonstrates that advanced plasma treatments can effectively replace traditional chemical washes for fresh produce. Implementing such methods could significantly lower the risk of foodborne illnesses without leaving chemical residues on food.
Further reading
Learn more about the latest innovations in food safety in the Nutrition section.
Source note: This article includes information reported by Nature.
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