Article (Scientific journals)
The potential of dairy manure and sewage management pathways towards a circular economy: A meta-analysis from the life cycle perspective
Zhang, Junyan; Wang, Mengmeng; Yin, Changbin et al.
2021In Science of the Total Environment, 779, p. 146396
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Keywords :
Bioenergy; Dairy farming; Life cycle assessment; Meta-analysis; On-farm waste management; Sustainability
Abstract :
[en] The global dairy farming sector has markedly expanded and intensified over the past decades due to the growing demand for milk and dairy products. The interest in implementing life cycle assessments of various manure and sewage management (MSM) strategies is increasing in a global scale, which is motivated by the concerns of environmental degradation caused by unsustainable MSM and growing awareness of circular economy. Life cycle thinking concept has been widely introduced to favor the comparative studies of different MSM strategies, with the aim of identifying suitable MSM strategies and formulating related policies. This meta-analysis presented comparative results of publicly available dairy MSM pathways, including waste-to-energy, composting, recycling, and other management pathways, aiming to explore potential benefits towards a circular economy. Results showed a consensus that waste-to-energy pathway significantly reduced global warming, eutrophication, and ecotoxicity potential. More specifically, the comparative performances of various detailed technologies belonging to a specified pathway were analyzed. Results indicated that anaerobic mono-digestion decreased global warming and eutrophication remarkably; its integrated management technologies reduced global warming considerably and a high decrease in eutrophication potential was observed. It revealed that most of current MSM strategies had limited potential and uncertain consequences to reduce environmental impacts and costs. In terms of influence factors, besides the intrinsic factor (pathway type), key extrinsic determinants including location, country income level, and farm scale were proved to affect mitigation potential of some specific impacts. Overall, it is necessary for the scientific community and policy-makers to focus on more possible trade-offs of different life-cycle performances towards sustainability and circularity.
Disciplines :
Animal production & animal husbandry
Quantitative methods in economics & management
Author, co-author :
Zhang, Junyan ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech
Wang, Mengmeng
Yin, Changbin
Dogot, Thomas ;  Université de Liège - ULiège > Département GxABT > Modélisation et développement
Language :
English
Title :
The potential of dairy manure and sewage management pathways towards a circular economy: A meta-analysis from the life cycle perspective
Publication date :
20 July 2021
Journal title :
Science of the Total Environment
ISSN :
0048-9697
eISSN :
1879-1026
Publisher :
Elsevier, Netherlands
Volume :
779
Pages :
146396
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 08 March 2021

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