Influence of feed temperature to biofouling of ultrafiltration membrane during skim milk processing |
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| Affiliation: | 1. STELA Dairy Research Center, Institute of Nutrition and Functional Foods (INAF), Department of Food Science, Université Laval, G1V 0A6, Québec, Canada;2. UMR Génie et Microbiologie des Procédés Alimentaires, GMPA, AgroParisTech, INRA, Université Paris-Saclay, 78850, Thiverval-Grignon, France;1. Polytechnic Institute of Beja, Escola Superior Agrária, Department of Technology and Applied Sciences, R. Pedro Soares, Ap. 6158, 7801-908 Beja, Portugal;2. University of Lisbon, Instituto Superior de Agronomia, Department of Agricultural and Environmental Chemistry, Tapada da Ajuda, 1349-017 Lisboa, Portugal;3. UIQA (Research Unit of Environmental Chemistry), Instituto Superior de Agronomia, Department of Agricultural and Environmental Chemistry, Tapada da Ajuda, 1349-017 Lisboa, Portugal;1. Canadian Centre for Human Microbiome and Probiotic Research, Lawson Health Research Institute, London, ON, Canada;2. Microbiology and Immunology, The University of Western Ontario, London, ON, Canada;3. Biochemistry, The University of Western Ontario, London, ON, Canada;4. Surgery, The University of Western Ontario, London, ON, Canada;1. Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Selangor, Malaysia;2. Research Centre for Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Selangor, Malaysia |
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| Abstract: | The temperature of the feed is known to be an important factor affecting the formation and the growth rates of bacterial communities on dairy filtration membranes. However, decades after the integration of filtration processes in the dairy industry, there is still questioning whether filtration should be performed at cold (<15 °C) or hot (>48 °C) temperature. A biofilm reactor designed to mimic a filtration system was used to provide answers to this question. Bacteria adhering and growing on ultrafiltration membranes in contact with pasteurised skim milk were characterised at 15 °C and 50 °C through a metabarcoding approach. Our results suggested that the processing time should be limited to 10 h at 50 °C to avoid the exponential growth of thermophilic spore-former bacteria, while the use of 15 °C combined with daily cleaning procedures appeared the best way to retard the formation of biofilms on membranes. |
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