2016 journal article
Systematic Evaluation of Industrial, Commercial, and Institutional Food Waste Management Strategies in the United States
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 50(16), 8444β8452.
New regulations and targets limiting the disposal of food waste have been recently enacted in numerous jurisdictions. This analysis evaluated selected environmental implications of food waste management policies using life-cycle assessment. Scenarios were developed to evaluate management alternatives applicable to the waste discarded at facilities where food waste is a large component of the waste (e.g., restaurants, grocery stores, and food processors). Options considered include anaerobic digestion (AD), aerobic composting, waste-to-energy combustion (WTE), and landfilling, and multiple performance levels were considered for each option. The global warming impact ranged from approximately β350 to β45 kg CO2e Mgβ1 of waste for scenarios using AD, β190 to 62 kg CO2e Mgβ1 for those using composting, β350 to β28 kg CO2e Mgβ1 when all waste was managed by WTE, and β260 to 260 kg CO2e Mgβ1 when all waste was landfilled. Landfill diversion was found to reduce emissions, and diverting food waste from WTE generally increased emissions. The analysis further found that when a 20 year GWP was used instead of a 100 year GWP, every scenario including WTE was preferable to every scenario including landfill. Jurisdictions seeking to enact food waste disposal regulations should consider regional factors and material properties before duplicating existing statutes.