Grease Co-Digestion at Dallas Water Utilities Shows Major Economic Benefits

Anaerobic Processes

“…The results showed a potential methane increase of 180% and an increase in VS destruction from 33 to 49% when using Water Environment Research, Volume 83, Number 10-Copyright © 2011 Water Environment Federation flavoring yeast waste, meat production waste, thin stillage from ethanol production, acid whey from soft cheese production, and soft drink waste from can crushing. The Dallas Water Utilities developed and incorporated codigestion of high strength wastes into their AD and electric cogeneration system as part of their Green Initiative (Sober et al, 2010). The authors determined that they could add 30,000 lbs of grease to 280,000-300,000 lbs of solids fed into the digesters in order to generate an additional 500,000 ft 3 of methane at a value of roughly $800,000.…”