Assessment of the state of food waste treatment in the United States and Canada

• Published in: Waste management (Elmsford) Vol. 30; no. 8; pp. 1486 - 1494
• Main Authors: Levis, J.W., Barlaz, M.A., Themelis, N.J., Ulloa, P.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.08.2010; Elsevier
• Subjects: Aerobiosis; Anaerobiosis; Applied sciences; Biodegradation, Environmental; Canada; Economics; Environmental Pollutants - analysis; Exact sciences and technology; Feedstock; Food; Foods; Garbage; General treatment and storage processes; Landfills; Marketing; Other wastes and particular components of wastes; Policies; Pollution; Public Policy; Purity; Refuse Disposal - economics; Refuse Disposal - methods; Refuse Disposal - statistics & numerical data; United States; Waste Products - statistics & numerical data; Waste treatment; Wastes; United States; North America; America; Canada; USA; Food waste; Organic waste; Composting; Waste dumping; Pollution; Anaerobe; Waste treatment; Pollution abatement; Aerobe; Anaerobic digestion
• ISSN: 0956-053X; 1879-2456
• DOI: 10.1016/j.wasman.2010.01.031

Currently in the US, over 97% of food waste is estimated to be buried in landfills. There is nonetheless interest in strategies to divert this waste from landfills as evidenced by a number of programs and policies at the local and state levels, including collection programs for source separated organic wastes (SSO). The objective of this study was to characterize the state-of-the-practice of food waste treatment alternatives in the US and Canada. Site visits were conducted to aerobic composting and two anaerobic digestion facilities, in addition to meetings with officials that are responsible for program implementation and financing. The technology to produce useful products from either aerobic or anaerobic treatment of SSO is in place. However, there are a number of implementation issues that must be addressed, principally project economics and feedstock purity. Project economics varied by region based on landfill disposal fees. Feedstock purity can be obtained by enforcement of contaminant standards and/or manual or mechanical sorting of the feedstock prior to and after treatment. Future SSO diversion will be governed by economics and policy incentives, including landfill organics bans and climate change mitigation policies.