Environmental Sustainability of Fluid Milk Delivery Systems in the United States

Jasmina Burek, Daesoo Kim, Darin Nutter, Susan Selke, Rafael Auras, Sarah Cashman, Beverly Sauer and Greg Thoma

Journal of Industrial Ecology, 2018, vol. 22, issue 1, 180-195

Abstract: Beverage producers in the United States choose packaging based on cost and consumer preference. Monolayer high†density polyethylene (HDPE) and gable†top carton containers have long dominated the U.S. fluid milk market, but pressure for more sustainable packaging is increasing. We present a broad discussion on environmental sustainability of 18 fluid milk containers through life cycle assessment. Because different container types require unique milk processing, distribution, and disposal and incur or avoid milk losses, fluid milk delivery systems (FMDSs) are evaluated, rather than containers in isolation. By assessing FMDSs, a complete measure of containers’ environmental sustainability was obtained. Despite conservative assumptions about milk losses, differences in container size, milk processing, distribution, and container recycling, pair†wise cradle†to†grave comparisons of FMDSs show there are no superior FMDSs. But, 500†to 1,000†milliliter FMDSs are potentially superior to ≥half gallon if they prevent milk losses. Thus, the future of FMDSs in the United States depends on the industry's ability to prevent distribution (12%) and consumption milk losses (20% to 35%). Farm†gate†to†grave comparisons showed that chilled HDPE FMDSs are superior to other plastic and chilled paperboard FMDSs for climate†change impact, but the result is inconclusive for chilled HDPE to ambient (unrefrigerated) paperboard or plastic pouch FMDS comparisons. Plastic pouch FMDSs show potential to reduce nonrenewable fossil energy, but need to be recyclable. Ambient FMDSs are superior to chilled FMDSs for water depletion. Eight†ounce paperboard FMDSs are superior to 8†ounce plastic FMDSs. Thus, alternative FMDSs may improve environmental sustainability of the U.S. postfarm fluid milk supply chain.

Date: 2018
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