Head of cattle:
= 100 head of cattle
Total quantity of manure produced annually
Total energy produced from manure
Equivalent number of U.S. homes powered annually
* Assumes 1,500 pound dairy cow produces 57 kg of manure daily.
Assumes biogas production of 1.15 m
per day per cow.
2009 data from
U.S. Energy Information Administration
Penn State College of Agriculture Sciences
. © 2014 Michael E. Webber, UT Austin
Webber Energy Group