Ultrasonic, acoustic and optical techniques for the non-invasive detection of fouling in food processing equipment

Abstract

The build-up of fouling in the heat exchangers and pipework of ultrahigh-temperature (UHT) processing plants, particularly those used for milk and milk products, can lead to a reduction in both efficiency and product quality. Regular cleaning-in-place schedules can be uneconomical in terms of downtime and materials. The use of sensing techniques in other industries has already demonstrated that it is feasible to monitor the build-up of fouling on line, thus enabling the optimum point at which to begin cleaning to be determined.