Chapter 1 - Anaerobic fermentation process for biomethane production from vegetable waste

Abstract

In this chapter, the anaerobic fermentation process for biomethane production from vegetable waste is fully introduced, including crushing technology, making of protein feed and organic acids, mixed anaerobic/microaerobic fermentation, vermicomposting, methods of improving methane productivity such as the use of additives, substrate reflux, raw material pretreatment, anaerobic fermentation reactors such as a plug flow reactor, upflow solids reactor, upflow anaerobic sludge bed, upflow anaerobic sludge blanket, plug flow reactor, internal circulation reactor, anaerobic sequence batch reactor, expanded granular sludge bed, and anaerobic digestion reactor construction, are illustrated. The principles of anaerobic fermentation of organic waste, that is, definition of anaerobic fermentation, microbial communities in anaerobic fermentation, theory and calculation of methane formation, and thermodynamics and kinetics of anaerobic fermentation are described. Equipment and technology used in anaerobic fermentation, such as traditional biogas fermentation equipment, modern large-scale industrial biogas fermentation equipment, wet fermentation and dry fermentation process, and comprehensive utilization of biogas and residue are also discussed. Biological hydrogen and methane production in the fermentation of organic waste, biological hydrogen production, and integrated equipment combining hydrogen and methane production with daily processing capacity of 10t of kitchen waste are outlined.