Up a steep dirt road in Haverhill, Massachusetts, past a set of old farm buildings, sits one of the newest anaerobic digesters in the country. It's the fourth facility of its kind from Vanguard Renewables, with many more on the way.
On a bright and brisk December afternoon, a tanker truck has pulled up to empty its liquefied organic contents into the underground receiving pit. The system can process up to 120 tons per day, but it will take multiple days for the slurry to actually make it into the adjacent digester domes.
By, Cole Rosengren, Waste Dive