Pulsed electric fields for microbial load reduction in flour
A novel method using pulsed electric fields (PEF) to reduce microbial load in flour without altering its properties or using chemicals. This approach optimizes PEF parameters based on flour's humidity and temperature, achieving a significant reduction in microorganisms.
Overview
Pulsed electric fields (PEF) offer an innovative solution for reducing microbial load in flour by 3-5 logarithmic points without altering its intrinsic properties or using chemicals. This method leverages short pulses of high voltage to target microorganisms, with the advantage of maintaining the flour's quality and safety. This approach is particularly relevant in the food industry to ensure product safety while preserving natural characteristics.
Technical specifications
- Pulsed Electric Fields (PEF): Utilizes short, high voltage pulses to disrupt microbial cell membranes.
- Target Reduction: Achieves a reduction of microbial load by 3-5 log points.
- Non-chemical Process: Preserves flour quality by avoiding chemical additives.
- Customization: PEF parameters (voltage, frequency) are optimized based on specific flour humidity and temperature conditions.
- Applications: Suitable for various types of flours, addressing both bacterial and fungal (yeast) contaminants.
Technology readiness level
Currently at a Technology Readiness Level (TRL) of 4, this technology has been validated in laboratory conditions. Future steps include optimizing parameters for specific flour conditions and scaling up trials in production facilities. This advancement requires further funding and engineering expertise to transition towards commercial application.
About Consejo Superior de Investigaciones Científicas
Consejo Superior de Investigaciones Científicas (CSIC) is Spain’s national public research organization and the country’s largest R&D institution, with a nationwide network of institutes across major innovation hubs. Many labs are co‑located with universities, hospitals, and science parks, giving partners plug‑and‑play access to advanced facilities, pilot‑scale capabilities, and testing services. Industry collaborates through contract research, sponsored development, and shared core facilities, with pathways into multi‑site European consortia. Research is supported by competitive European programs and Spain’s national funding agencies. A dedicated technology transfer office manages IP, licensing, and spin‑off formation to accelerate commercialization.
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