Question

The gas potential for pig manure is 6.0 ft3/lbVS, and the average animal produces 1.30 dry lbs/day of manure which has 0.90 lbVS/dry lbs manure. The energy content of methane gas is 21,433 Btu/lb, and the density is 0.0416 lb/ft3. What is the daily energy potential in the methane produced for one animal?

Answer 1

6259.12 \frac{Btu}{day}

Step-by-step explanation:

Given -

Gas potential for pig manure - 6.0 ft3/lbVS

Average manure produced by animal - 1.30 dry lbs/day

Dry manure - 0.90 lbVS/dry lbs

Density - 0.0416 lb/ft3

Energy content of methane - 21,433 Btu/lb

Potential of manure -

`1.30` dry lbs/day
`*`
`0.90` lbVS/dry lbs

`= 1.17` lbVS/day

The daily energy potential for one animal is equal to

`1.17` lbVS/day
`* 0.0416`lb/ft3
`* 6.0`ft3/lbVS
`* 21,433`Btu/lb

`1.17 * 0.0416* 6.0* 21,433 * (lbVS* lb*ft^3* Btu)/(day*ft^3* lbVS * lb) \\= 6259.12 (Btu)/(day)`