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ACETIC ACID PRODUCTION FROM MILK PERMEATE IN ANAEROBIC THERMOPHILIC FERMENTATION THÈSE N 2043 PRÉSENTÉE AU DÉPARTEMENT DE GÉNIE RURAL ÉCOLE POLYTECHNIQUE FÉDÉRALE DE LAUSANNE POUR L`OBTENTION DU GRADE DE DOCTEURE ÈS SCIENCES TECHNIQUES PAR Mylène TALABARDON – ALBESA Ingénieure de génie rural, spécialisation environnement (EPFL) de nationalité française Acceptée sur proposition du jury : Prof. P. Péringer, directeur de thèse Prof. K.L. Kovacs, corapporteur Dr. I. Marison, corapporteur Ing. B. Ryser, corapporteur Dr. J.-P. Schwitzguébel, corapporteur Prof. J. Tarradellas, corapporteur Prof. S.-T. Yang, corapporteur Lausanne, EPFL 1999 ° Acknowledgments This work was carried out at the Environmental Biotechnology Laboratory (Laboratoire de Biotechnologie Environnementale) of the Swiss Federal Institute of Technology (EPFL) from September 1996 to August 1999, supported by the Swiss Federal Office for Education and Science, in the framework of COST Action 818. First, I am grateful to Prof. Paul Péringer for giving me the opportunity and the freedom to carry out this work. I wish to express my thankfulness to Dr. Jean-Paul Schwitzguébel for providing support and advices, and allowing me to attend and present my work at many conferences in Europe and USA. I would like to thank Ing. B. Ryser with the Cremo Company for providing milk permeate during the last three years. Special thanks ...