Anaerobic fermentation creates biogas under the lack of oxygen. Anaerobic state
helps in the development of germ on natural biomass and exchanges it into methane
(60–70%) and carbon dioxide (Srivastava et al. 2020).
In the anaerobic digestion conversion process, the first stage (Fig. 1.10) is
hydrolysis whereby algae cell walls should be destroyed down by the bacteria’s
activities. This is the separating of particulate natural material of algae to soluble
sugars and amino acid.
The next stage is the fermentation. Change of soluble sugars and amino acid from
the chief step to ammonia, hydrogen, and carbon dioxide occurred in the fermentation stage.
The third step is acetogenesis or the oxidation of fermented products to oxidize all
the acids from the fermentation method.
Fig. 1.9 Lipid extraction methods from microalgae (Mubarak et al. 2015)
Fig. 1.10 Anaerobic digestion conversion process (Rodionova et al. 2016)
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Z. Shahi and M. Khajeh Mehrizi
helps in the development of germ on natural biomass and exchanges it into methane
(60–70%) and carbon dioxide (Srivastava et al. 2020).
In the anaerobic digestion conversion process, the first stage (Fig. 1.10) is
hydrolysis whereby algae cell walls should be destroyed down by the bacteria’s
activities. This is the separating of particulate natural material of algae to soluble
sugars and amino acid.
The next stage is the fermentation. Change of soluble sugars and amino acid from
the chief step to ammonia, hydrogen, and carbon dioxide occurred in the fermentation stage.
The third step is acetogenesis or the oxidation of fermented products to oxidize all
the acids from the fermentation method.
Fig. 1.9 Lipid extraction methods from microalgae (Mubarak et al. 2015)
Fig. 1.10 Anaerobic digestion conversion process (Rodionova et al. 2016)
16
Z. Shahi and M. Khajeh Mehrizi