The solution for very gassy landfills is to drill some wells, collect and condition the gas, and run it into a gas turbine genset. This is nothing new, in fact it is a common practice.
Not far from my place is a hog packing plant with a huge
burn off torch for their waste lagoon. About 1/4 mile away
is a grain drying business with huge LP tanks to run the
dryers. Drives me nuts every time I see it!