Waste Management tapped to process Portland, OR food scraps

Metro has commenced negotiations to site a plant that converts the region's food scraps into energy near Portland's sewage treatment plant in North Portland. 

By Steve Law, Portland Tribune.

On Jan. 5, Metro selected Waste Management, the nation's largest garbage company, to build an anaerobic digester to process food scraps into energy. Waste Management is teaming with the Portland Bureau of Environmental Services, which operates the Columbia Boulevard Wastewaster Treatment Plant at 5001 N. Columbia Blvd.

Waste Management, based in Houston, has developed a technology that uses food scraps to boost the energy created by converting sewage into biogas. 

Anaerobic digesters deploy bacteria in airless chambers to break down food and other organic material and convert it to biogas, which can then be used for vehicle fuel, natural gas or electricity.