yes it could. Think of all the poultry farms across the country. Fryers are raised to 7 to 8 weeks and then houses cleaned out. It would work there as well.
None of this is anything new. There are folks in India building thier own biogas plants to generate cooking gases. These plants use kitchen scraps to produce enough methane to cook three meals a day for a family of four.
http://www.bioenergylists.org/en/compactbiogas