How can food processing plants eliminate biofilm and Listeria reservoirs in deep drainage networks without risking production contamination?

Drainage systems are one of the most common locations for biofilm build-up and Listeria reservoirs within food processing facilities. If not managed correctly, traditional cleaning methods can aerosolise bacteria, increasing the risk of airborne cross-contamination in high-care production areas.

To minimise this risk, facilities should use temperature-controlled high-pressure flushing alongside food-safe, biodegradable sanitising agents. This combination effectively breaks down organic fats, oils and greases (FOG), as well as the biofilms that allow harmful bacteria to thrive, without introducing unnecessary contamination risks.

Once the cleaning process is complete, validation is just as important as the cleaning itself. High-definition, explosion-proof (ATEX-rated) CCTV drainage surveys provide visual confirmation that drainage lines are structurally sound and free from organic deposits or debris that could harbour bacteria. This documented evidence helps demonstrate compliance with Food Standards Agency (FSA) guidance and GFSI-aligned food safety standards, including BRCGS requirements.

By combining specialist cleaning techniques with thorough inspection and verification, food manufacturers can significantly reduce the risk of contamination, improve hygiene standards and maintain confidence that their drainage infrastructure is supporting, rather than compromising, food safety.