Substrates for biogas production

Bio-chemical conversion two-culture-system for the production of substrates for biogas production, cultivation of input products for the ethanol production. 

All types of biomass can be used as substrates for biogas production as long as they contain carbohydrates, proteins, fats, cellulose, and hemiceUuloses as main components. The composition of biogas and the methane yield depends on the feedstock type, the digestion system, and the retention time [82]. The theoretical gas yield varies with the content of carbohydrates, proteins, and fats (Table 1.1). 

Various co-digestion techniques had been done by mixing the substrate for biogas production with compound such as glycerol, agricultural wastes, and food wastes. 

Table 6.3 Substrates commonly used for biogas production...

Depending on the substrate used for biogas production the type and amount of impurities vary largely, according to Tables 4.2 and 4.3. 

Figure 2.38. Schematic layout of substrate fermentation plant for hydrogen production, with infrastructure for residue collection/recycling and hydrogen gas purification. The blanket hydrogen reactor is similar to those used in biogas plants (Sorensen, 2004c).

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