Fouling monitoring during ohmic heating of dairy products with a cell jet

In: Proceeding of 8th World Congress of Chemical Engineering (WCCE8), August 23-29, Montréal, Quebec, Canada. Eds. Canadian Society for Chemical Engineering. (Ontario, Canada), ISBN: 0-9208044-44-6, Session: Food Processing and Emerging Trends, L.0899, 2009 Abstract: The development of alternative technologies like direct Joule effect heater to pasteurise and sterilise liquid food product in a continuous process is of great scientific and industrial interest. Heat treatment by direct Joule effect exhibits numerous advantages because rapid heating kinetics or homogeneous heat treatment is required. However, fouling of electrode surfaces in this kind of apparatus is extensively problematic compared to conventional heat exchangers. In present study, a new continuous ohmic heating apparatus (Emmepiemme®, Piacenza, Italy) in which an alternative electrical current is applied directly to the falling jet between the two stainless steel electrodes is investigated. Conventional fouling measurements (pressure drop, heat transfer or electrical parameters) could not be used in such heater. Heat treatment of model dairy product is reported and fouling is investigated with an innovative fouling sensor using hot wire technique.In: Proceeding of 8th World Congress of Chemical Engineering (WCCE8), August 23-29, Montréal, Quebec, Canada. Eds. Canadian Society for Chemical Engineering. (Ontario, Canada), ISBN: 0-9208044-44-6, Session: Food Processing and Emerging Trends, L.0899, 2009Abstract: The development of alternative technologies like direct Joule effect heater to pasteurise and sterilise liquid food product in a continuous process is of great scientific and industrial interest. Heat treatment by direct Joule effect exhibits numerous advantages because rapid heating kinetics or homogeneous heat treatment is required. However, fouling of electrode surfaces in this kind of apparatus is extensively problematic compared to conventional heat exchangers. In present study, a new continuous ohmic heating apparatus (Emmepiemme®, Piacenza, Italy) in which an alternative electrical current is applied directly to the falling jet between the two stainless steel electrodes is investigated. Conventional fouling measurements (pressure drop, heat transfer or electrical parameters) could not be used in such heater. Heat treatment of model dairy product is reported and fouling is investigated with an innovative fouling sensor using hot wire technique.Fouling monitoring during ohmic heating of dairy products with a cell jet . 8.World Congress of Chemical Engineering (WCCE8