# A $2 \mathrm{~m}^{3}$ biogas plant is to be operated using cow-dung as feedstock. The cow-dung is mixed with water in proportion of 1: 1 (by weight) to form a slurry of density $1090 \mathrm{~kg} \mathrm{~m}^{-3}$. The yield of biogas is $0.036 \mathrm{~m}^{3} \mathrm{~kg}^{-1}$ of cow-dung. If the hydraulic retention time is 40 days, volume of the digester of the biogas plant will be____________ $\mathrm{m}^{3}$

## Question ID - 156523 :- A $2 \mathrm{~m}^{3}$ biogas plant is to be operated using cow-dung as feedstock. The cow-dung is mixed with water in proportion of 1: 1 (by weight) to form a slurry of density $1090 \mathrm{~kg} \mathrm{~m}^{-3}$. The yield of biogas is $0.036 \mathrm{~m}^{3} \mathrm{~kg}^{-1}$ of cow-dung. If the hydraulic retention time is 40 days, volume of the digester of the biogas plant will be____________ $\mathrm{m}^{3}$

3537

Answer Key : (3.90 to 4.20) -

3.90 to 4.20

Next Question :

A power tiller with diesel engine produces $12 \mathrm{~kW}$ of brake power with a brake thermal efficiency of $30 \%$. If the air-fuel ratio in the combustion process is 14: 1 and heating value of the fuel is $45 \mathrm{MJ} \mathrm{kg}^{-1}$, air consumption rate of the engine will be_________ $\mathrm{kg} \mathrm{h}^{-1}$