Did they happen to analyze the foam?Apparently, it contains mostly methane. The interesting question is more what causes it:
The researchers conduct their studies on commercial farms in Minnesota and surrounding states. Chuck Clanton, a bioproducts and biosystems engineering professor, said the team’s current approach is targeting how different microorganisms—primarily bacteria—developed in the manure pit. They think that a new set of species has formed in these pits in the last few years.[…]
“It’s very frustrating when you have two identical buildings sitting next to each other with same management, genetics, diets, etc. One foams, and the other does not,” Clanton said.
METHANE could be a cash crop.
Stuff is combustible. Could be used to heat the facilites or heat water..