The industrial production allows the exploitation of the capacity of microorganisms, established by scientific techniques, it can solve several problems in different fields. It requires a sophisticated, important, complicated and difficult to control equipment and a thorough basic knowledge to master it. Hence the interest of this book, which allows you to acquire these basic notions, to become familiar with the equipment and the different accessories and to master the way it works. This mastery allows to manage the different processes and to reach the desired production whether it concerns microorganisms (biomass) or their metabolites.