Anaerobic digester technology is actually fairly basic: cattle manure is pumped into a tank (the Hoffs plan to use a concrete tank, although some digesters use steel tanks) where anaerobic bacteria break down components by feeding on the volatile fatty acids of the manure, creating methane gas.
More recently, the Stop & Shop Supermarket Company broke ground on an anaerobic digester facility in Freetown, Massachusetts, with a planned capacity of 95 tons per day and expected opening date of early 2016.
e anaerobic digester will work by using microbes to break down the organic materials to transform them into a biogas which will be used to heat the chemical plant.
HRS DTI heat exchangers are ideal for heating sludge in anaerobic digesters as the corrugated tubes provide an internal tube profile that inhibits fouling tendencies and increases the rate of heat transfer.
4-million gallon anaerobic digester tank in Lewiston, Maine, generates enough electricity to offset 80 percent of the energy used at its wastewater treatment facility.