Digesters process manure to capture methane and refine it into what has been dubbed “renewable natural gas.” So far the state has invested hundreds of millions of dollars in 117 digester ...

Iowa has permitted 15 new digester facilities since 2021, when the Legislature passed a law allowing animal feeding operations with digesters to exceed the state’s limit of 8,500 animal units.

Digesters work by heating manure to around 100 degrees Fahrenheit, warm enough for bacteria to generate methane gas that can be trapped and used to power an electric generator, which is connected ...

Sealing manure ponds at a Central Valley farm led to a significant reduction in emissions. A large, balloon-like tarp covers ...

"Digesters" that convert methane from manure ponds into fuel can dramatically reduce emissions of this potent greenhouse gas on dairy farms, scientists have found.

MADISON - New research conducted by environmental groups argues that manure digesters, seen as a solution to pollution from large-scale livestock farms, do more harm than good because of other ...

Methane gas digesters are used by dairy farms to convert manure into energy and reduce their greenhouse gas (GHG) emissions. The addition of food waste in co-digesters enables small and mid-sized ...

From the outside, his manure digester looks like a big gray bunker — a rectangular concrete block about waist-high, 274 feet long by 75 feet wide — and it’s covered in a foam insulation that ...

Novilla, a Michigan company, recently started construction on another manure digester system in Winneshiek County that is opposed by some residents. The Iowa DNR issued permits for the two ...

The Environmental Protection Agency says that in 2022, manure-based digesters reduced greenhouse gas emissions by the equivalent of 10.43 million metric tons of carbon dioxide.

MADISON -- A 1.25-million gallon manure digester near Waunakee won't resume operations until authorities determine the cause of an explosion and fire that destroyed its outer roof early Wednesday ...