Use of an Ethanol Bio-Refinery Product as a Soy Bean Alternative in Diets for Fast-Growing Meat Production Species: A Circular Economy Approach

Emily Burton, Dawn Scholey, Ashraf Alkhtib and Peter Williams
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Emily Burton: School of Animal, Rural and Environmental Sciences, Brackenhurst Campus, Nottingham Trent University, Southwell NG25 0QF, UK
Dawn Scholey: School of Animal, Rural and Environmental Sciences, Brackenhurst Campus, Nottingham Trent University, Southwell NG25 0QF, UK
Ashraf Alkhtib: School of Animal, Rural and Environmental Sciences, Brackenhurst Campus, Nottingham Trent University, Southwell NG25 0QF, UK
Peter Williams: Fluid Quip Technologies, LLC, A Division of Green Plains Inc., Cedar Rapids, IA 52402, USA

Sustainability, 2021, vol. 13, issue 19, 1-13

Abstract: The recent conceptual pivot from bioethanol production to ethanol biorefining has led to development of protein derived by fractionating the non-ethanol streams post fermentation within the plant. The aim of this study was to identify the effect of replacing dietary soy with corn-fermented protein (CFP) on performance of fast-growing meat species and the impact on the carbon footprint associated with the feed for each species. The study contains trials on 3 species, broiler, turkey and salmon. In trial one, 324 broiler chicks were allocated randomly to 36 pens distributed into 3 dietary treatments; control (0% CFP), 5% CFP and 10% CFP; for 35 days. In trial 2, 150 turkey poults were allocated to 3 treatments: control (0 CFP), 4% CFP and 8% CFP for 35 days. In trial 3, 525 Atlantic Salmon (starting weight 304 g ± 10.7 g) were raised in 15 saltwater tanks for 84 days with 5 treatments, control (0% CFP), 5% CFP, 10% CFP, 15% CFP and 20% CFP. Growth response, nutrient utilisation and carbon footprint were assessed in each trial. Replacement of soy with CFP showed limited differences in growth response and nutrient utilization but replacing soy bean meal with CFP at rate of 5%, 8% and 10% in broiler, turkey and salmon diets, respectively resulted in a 14% decrease in carbon footprint of diet manufacturing. This investigation shows coupling bioethanol production with poultry and salmon production represents a highly effective circular economy contributing to multiple UN Sustainable Development Goals.

Keywords: sustainable development; food security; biorefining; salmon; poultry; net zero (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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