• Average cellulose percentage in bamboo from 75 to 85%, extractive 8 to 10 %  and Lignin 24 to 32 % Ref 1

75% is cellulose hence 6kg cellulose in 8 kg bamboo Biomass

Molecular formula for cellulose is C6H10O5 and molecular weight 168. 6000 grams is equivalent to 37.3 e moles of cellulose. That is 37.03 moles of cellulose

• Each cellulose molecule will lead to 3 moles of Methane and 3 moles of carbon dioxide

i.e.  37.03 moles of cellulose will produce 111 moles of Methane

111 moles of Methane = 1778 grams of Methane

• Considering 40% dry mass Ref 2 8 kg of bamboo will produce

1778 × 0.4 = 711. 2 grams of Methane and 800 grams of Lignin undigested in biogas slurry

Considering dry bamboo which has 15% water the calculation will be

1778 × 0.85 = 1511 grams of Methane and1700 g of Lignin undigested in biogas slurry

Ref 1: https://www.researchgate.net/publication/256088901_Chemical_Composition_of_Four_Cultivated_Tropical_Bamboo_in_Genus_Gigantochlo

Ref 2:   Journal of Civil Engineering Mr Waghmare KK Wagh college Nashik