Abstract
Biohythane, the blending of biohydrogen—biomethane with hydrogen concentration ranging in between 10% and 30% (v/v). It can be generated via utilizing various organic substrates through two-stage sequential anaerobic stages, that is, the dark fermentation step followed by the anaerobic digestion step, for biohydrogen and biomethane production, respectively, for viable biohythane production from waste organics. In comparison to the conventional biogas, biohythane is advantageous owing to its eco-benign, greater bio-energy recovery, and smaller fermentation duration. However, the conversion of organic waste to biohythane is presently at the bench scale and requires the bioprocess study and further scaling up to industrial level are obligatory. Besides, this chapter brought for forefronting the biochemical reactions, thermodynamics involved, production process, various organic waste feedstocks, two-stage sequential anaerobic stages, of biohythane production. Finally, the energy aspects techno-economic, current challenges and future perspectives for further scaling up of the process have been discussed.
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