This book discusses the integration of engineering, biology, physics, mechanics, and electronics, which formulate the emerging discipline of Biosystems Engineering. It elucidates the role of Biosystems Engineer in designing, manufacturing and operating bioreactors as well as managing, controlling and maintaining various biosystems. Also, the methods of producing high value-added bioproducts such as biofuels, pharmaceuticals, nutraceuticals and others such as power and heat from biomass and renewable biological resources are discussed.