Introduction Introduction Nonconventional Energy Resources Conventional Hydrogen Technologies and Limitations Biological Hydrogen Production Technology Properties of Hydrogen Book Overview References Microbiology Introduction Dark Fermentative Bacteria Photosynthetic Fermentative Bacteria Cyanobacteria Green Algae Concept of Consortia Development Synthetic Microorganisms--Are They the Future? Glossary References Hydrogen Production Processes Introduction Photobiological Hydrogen Production Photofermentation Dark Fermentation Hybrid Processes Microbial Electrolysis Cell Thermodynamic Limitations Glossary References Biohydrogen Feedstock Introduction Simple Sugars as Feedstock Complex Substrates as Feedstock Biomass Feedstock Organic Acids Waste as Feedstock Assessment of Cost Components for Several Feedstocksfor Dark Hydrogen Fermentation Conclusion Glossary References Molecular Biology of Hydrogenases and Their Accessory Genes Introduction Occurrence of Hydrogenase in Nature Classification of Hydrogenases Problems Associated with Oxygen Sensitivity ofHydrogenases and Plausible Solutions Evolutionary Significance of Hydrogenase Conclusion Glossary References Improvement of Hydrogen Production through MolecularApproaches and Metabolic Engineering Introduction Molecular Approaches Metabolic Engineering Conclusion Glossary References Process and Culture Parameters Introduction Factors Affecting Dark Fermentation Process Environmental Factors Affecting Hydrogen Productionin Photosynthetic Organisms Statistical Optimization of Factors Effecting BiohydrogenProduction Comparison of Suspended Cell versus Immobilized Systems Comparison of Batch Process versus Continuous Process Conclusion Glossary References Photobioreactors Introduction Types of PBRs Physicochemical Parameters Design Criterion Comparison of the Performance of the PBRs Energy Analysis Conclusion Glossary References Mathematical Modeling and Simulation of the BiohydrogenProduction Processes Introduction Development of Mathematical Models to CorrelateSubstrate and Biomass Concentration with Time Substrate Inhibition Model Determination of Cell Growth Kinetic Parameters: KS , μmax, Ki Cumulative Hydrogen Production by Modified Gompertz'sEquation Development of Mathematical Models for Cell GrowthKinetics in Photofermentation Process Modeling of Hydrogen Production by Photofermentation Conclusion Nomenclature References Scale-Up and Energy Analysis of Biohydrogen ProductionProcesses Introduction Determination of Scale-Up Parameters Scale-Up Methods Case Studies on Pilot-Scale Plants Mass and Energy Analysis Cost Analysis of the Process Conclusion Nomenclature Glossary References Biohydrogen Production Process Economics, Policy,and Environmental Impact Introduction Process Economy Environmental Impact Hydrogen Policy Issues and Barriers Status of Hydrogen in the Developed and theDeveloping Countries Future Outlook Glossary References Index.