Publication
Title
Cost-effectiveness of optimizing concentrated feed blends to decrease greenhouse gas emissions
Author
Abstract
Livestock production is under growing public and scientific scrutiny for its greenhouse gas (GHG) emissions. This article contains a preliminary assessment of the inclusion of upstream life-cycle GHG emissions in concentrated feeds design, using the most common nonlinear programming optimization algorithms to determine feed composition. First, GHG emissions are included as costs in a single criteria optimization problem. The unit price of GHG emissions was obtained using a genetic algorithm. Second, GHG emissions are included as a target function to minimize in a multi criteria optimization problem using goal attainment programming Results obtained after both optimization methods were applied to two case studies, namely fattening pigs and rabbit feeds. Changing ingredients in concentrated feed blends has a marginal effect on GHG emissions due to mandatory nutritional constraints. If the optimization is unconstrained, the maximum possible decrease in GHG emissions is 27.5% for the pigs feed, accompanied by increasing costs and a decrease in feed nutritional quality. To maintain nutritional integrity, the maximum possible reduction in GHG emissions is 7.5%. Considering cost as an optimization variable in the problem, the maximum decreases are even lower. It is possible to decrease emissions by 71% for the rabbits feed, but the cost of the reduction is higher than the opportunity cost for farmers to reduce GHG emissions using other strategies. These results are qualitatively robust but critically depend on feed ingredients GHG emissions and cost data.
Language
English
Source (journal)
Environmental Engineering and Management Journal / Universitatea Tehnica "Gheorghe Asachi" Iasi. Editura Politehnium. - [S.l.], 2002, currens
Publication
[S.l.] : Institutul Politehnic "Gheorghe Asachi" din Iasi, 2018
ISSN
1843-3707
1582-9596
Volume/pages
17:4(2018), p. 999-1007
ISI
000431134900024
Full text (Publisher's DOI)
UAntwerpen
Project info
Bio-LCA: Introducing biodiversity in life cycle assessment (LCA).
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 12.06.2018
Last edited 02.08.2021
To cite this reference