2.5 Research methodology
Digester volume = 500 mL, Volume of slurry =
450 mL and Headspace = 50 mL.
Slurry = weight of manure + water in ratio of 1:0.5
for (cattle and poultry dung) and water respectively.
That is 300 g of poultry and cattle dung + 150 mL of
water.
Digester A: Cow dung 25% of 300 g = 75 g, Poultry
75% of 300 g = 225 g.
Digester B: Cow dung 50% of 300 g = 150 g, Poultry
wastes 50% of 300 g = 150 g.
Digester C: Cow dung 75% of 300 g = 225 g, Poultry
wastes 25% of 300 g = 75 g.