This book provides in-depth information on basic and applied aspects of biohydrogen production. It begins with an introduction to the topic, and follows with the basic scientific aspects of biohydrogen production, such as the enzyme involved in biohydrogen production, the microorganisms and metabolic engineering information. It then provides state-of-art information on various aspects of biohydrogen production methods such as from solid wastes, from industrial effluents, thermo-chemical route for biohydrogen production, etc. It also includes information on engineering aspects such as the design of bioreactors for biohydrogen production and scale-up issues. Finally, it touches on the issues of hydrogen economy and commercialization. The book introduces you to all aspects of biohydrogen research, helping you understand the various issues involved and plan your own research based on recent findings and commercial needs. It provides information on the most advanced and innovative biohydrogen technologies, including fermentation and metabolic processes. It provides examples on large-scale and commercial applications of biohydrogen processes and explains the steps necessary for scaling-up. It explains the chemistry/theory of the processes involved and provides information on integration of the various processes and technologies on biohydrogen. It guides you through the process design, reactors and materials selection. It devotes a whole chapter on the economical aspects of the processes and their commercialization.