Environmental performance of mixed animal and plant protein sources for designing new fermented foods

• Published in: Cleaner environmental systems Vol. 9; p. 100115
• Main Authors: Huguet, Juliette, Chassard, Christophe, Lavigne, René, Irlinger, Françoise, Souchon, Isabelle, Marette, Stephan, Saint-Eve, Anne, Pénicaud, Caroline
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.06.2023; Elsevier
• Subjects: Dairy products; Economics and Finance; Fermentation; Humanities and Social Sciences; Legumes; Life cycle assessment (LCA); Sustainable diets; Sustainable proteins; Sustainable diets; Legumes; Life cycle assessment (LCA); Dairy products; Sustainable proteins; Fermentation; LCAINRAE
• ISSN: 2666-7894; 2666-7894
• DOI: 10.1016/j.cesys.2023.100115

In the food industry, there is currently a great deal of interest in the development of plant-based alternatives to dairy products. However, little is known about the ways in which differences in formulation and/or processing affect the potential environmental benefits of such products. In this study, we investigated the environmental performance of four new fermented products created using different mixtures of plant- (pea) and animal- (cow milk) derived protein sources and prepared using a cheese-technology process (Camembert production). Life cycle assessments (LCAs) were performed that included all steps from the agricultural production of ingredients to the generation of the final ready-to-eat product. The goals were to identify the hotspots of this production system and to compare the different products to each other as well as to other common fermented or legume-based products (Camembert, tofu, hummus). The LCA results revealed that the two main hotspots for the mixed products were milk production (when used) and the ripening stage. All four products were similar with respect to the environmental impacts related to processing. Instead, with regard to the impacts of agricultural production, the products made with a higher proportion of pea protein were superior, providing clear evidence of the potential environmental benefit of pea-milk fermented foods. Overall, though, the mixed products did not present any environmental benefit compared to Camembert, hummus, and tofu due to the complex and energy-intensive nature of the manufacturing process. It is therefore critical that these processing steps be simplified and optimized in order to realize the environmental potential of such pea-based products. •LCAs were performed of fermented food products mixing pea and milk protein sources.•Reconstituted milk (when used) and product ripening were the hotspots of this system.•Increasing the pea content of the mixed products reduced environmental impact.•Mixed products had higher environmental impacts than Camembert, hummus, and tofu.•Processing steps need to be simplified and optimized to reduce the impact of these foods.