From animals to crops : environmental consequences of current and future strategies for manure management

J.W. de Vries

Research output: Thesisinternal PhD, WUAcademic

Abstract

Animal manure is a key component that links crop and livestock production as it contains valuable nutrients for the soil and crop. Manure is also a source of environmental pollution through losses of nutrients, such as nitrogen (N) and phosphorus (P), and losses of carbon (C). These losses are largely determined by the way manure is managed. Technologies to reduce nutrient and C losses from manure mainly focused on reducing a single emission while unwillingly increasing another emission at the same time; a phenomenon called pollution swapping. To prevent pollution swapping, we need to gain insight into the integral environmental consequences of technologies and use these insights to (re)design the manure management chain. The aim of this thesis, therefore, was to provide knowledge and insight into the environmental consequences of current and future strategies for manure management. The environmental consequences of the following technologies were assessed: mono- and co-digestion of liquid manure; high-tech separation of liquid manure with further dewatering of the liquid fraction; and segregating fattening pig urine and feces inside the housing system. Following, we designed new strategies for integrated manure management that prevent pollution swapping, and assessed the environmental consequences of these strategies. Life cycle assessment was used to calculate the environmental impacts of current and future strategies. For the design, we adapted and used a structured approach to engineering design to create new strategies for integrated manure management. It was concluded that mono-digestion of liquid manure reduced the environmental impact compared to conventional manure management, but has a low potential to produce bio-energy. Co-digestion with waste and residues, such as roadside grass, increased bio-energy production and further reduced the environmental impact. Co-digestion with substrates that compete with animal feed increased bio-energy production, but also the overall environmental impact from producing a substitute for the used co-substrate. Separating liquid manure into liquid and solid fractions with further de-watering of the liquid fraction increased the environmental impact compared to manure management without processing. A combination of separation and anaerobic mono-digestion of the solid faction reduced climate change and fossil fuel depletion. Segregating fattening pig urine and feces in the housing system reduced climate change, terrestrial acidification, and particulate matter formation and provided a sound basis for environmentally friendly manure management. Applying a structured design approach enabled the design of new strategies for integrated manure management that prevented pollution swapping. The approach proved to be successful because the environmental impact reduced throughout the manure management chain by at least 57% and more than doubled the nitrogen use efficiency compared to current North Western European manure management practices.

LanguageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • Wageningen University
Supervisors/Advisors
  • Groot Koerkamp, Peter, Promotor
  • de Boer, Imke, Promotor
  • Hoogmoed, Willem, Co-promotor
  • Groenestein, Karin, Co-promotor
Award date17 Jan 2014
Place of PublicationWageningen
Publisher
Print ISBNs9789461738325
Publication statusPublished - 2014

Fingerprint

manure
crop
animal
environmental impact
digestion
bioenergy
pollution
environmental consequence
pig
feces
urine
liquid
nutrient
substrate
climate change
nitrogen
livestock farming
dewatering
crop production
fossil fuel

Keywords

  • animal manures
  • manure treatment
  • environmental impact

Cite this

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title = "From animals to crops : environmental consequences of current and future strategies for manure management",
abstract = "Animal manure is a key component that links crop and livestock production as it contains valuable nutrients for the soil and crop. Manure is also a source of environmental pollution through losses of nutrients, such as nitrogen (N) and phosphorus (P), and losses of carbon (C). These losses are largely determined by the way manure is managed. Technologies to reduce nutrient and C losses from manure mainly focused on reducing a single emission while unwillingly increasing another emission at the same time; a phenomenon called pollution swapping. To prevent pollution swapping, we need to gain insight into the integral environmental consequences of technologies and use these insights to (re)design the manure management chain. The aim of this thesis, therefore, was to provide knowledge and insight into the environmental consequences of current and future strategies for manure management. The environmental consequences of the following technologies were assessed: mono- and co-digestion of liquid manure; high-tech separation of liquid manure with further dewatering of the liquid fraction; and segregating fattening pig urine and feces inside the housing system. Following, we designed new strategies for integrated manure management that prevent pollution swapping, and assessed the environmental consequences of these strategies. Life cycle assessment was used to calculate the environmental impacts of current and future strategies. For the design, we adapted and used a structured approach to engineering design to create new strategies for integrated manure management. It was concluded that mono-digestion of liquid manure reduced the environmental impact compared to conventional manure management, but has a low potential to produce bio-energy. Co-digestion with waste and residues, such as roadside grass, increased bio-energy production and further reduced the environmental impact. Co-digestion with substrates that compete with animal feed increased bio-energy production, but also the overall environmental impact from producing a substitute for the used co-substrate. Separating liquid manure into liquid and solid fractions with further de-watering of the liquid fraction increased the environmental impact compared to manure management without processing. A combination of separation and anaerobic mono-digestion of the solid faction reduced climate change and fossil fuel depletion. Segregating fattening pig urine and feces in the housing system reduced climate change, terrestrial acidification, and particulate matter formation and provided a sound basis for environmentally friendly manure management. Applying a structured design approach enabled the design of new strategies for integrated manure management that prevented pollution swapping. The approach proved to be successful because the environmental impact reduced throughout the manure management chain by at least 57{\%} and more than doubled the nitrogen use efficiency compared to current North Western European manure management practices.",
keywords = "dierlijke meststoffen, mestverwerking, milieueffect, animal manures, manure treatment, environmental impact",
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note = "WU thesis 5671",
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publisher = "Wageningen University",
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de Vries, JW 2014, 'From animals to crops : environmental consequences of current and future strategies for manure management', Doctor of Philosophy, Wageningen University, Wageningen.

From animals to crops : environmental consequences of current and future strategies for manure management. / de Vries, J.W.

Wageningen : Wageningen University, 2014. 178 p.

Research output: Thesisinternal PhD, WUAcademic

TY - THES

T1 - From animals to crops : environmental consequences of current and future strategies for manure management

AU - de Vries, J.W.

N1 - WU thesis 5671

PY - 2014

Y1 - 2014

N2 - Animal manure is a key component that links crop and livestock production as it contains valuable nutrients for the soil and crop. Manure is also a source of environmental pollution through losses of nutrients, such as nitrogen (N) and phosphorus (P), and losses of carbon (C). These losses are largely determined by the way manure is managed. Technologies to reduce nutrient and C losses from manure mainly focused on reducing a single emission while unwillingly increasing another emission at the same time; a phenomenon called pollution swapping. To prevent pollution swapping, we need to gain insight into the integral environmental consequences of technologies and use these insights to (re)design the manure management chain. The aim of this thesis, therefore, was to provide knowledge and insight into the environmental consequences of current and future strategies for manure management. The environmental consequences of the following technologies were assessed: mono- and co-digestion of liquid manure; high-tech separation of liquid manure with further dewatering of the liquid fraction; and segregating fattening pig urine and feces inside the housing system. Following, we designed new strategies for integrated manure management that prevent pollution swapping, and assessed the environmental consequences of these strategies. Life cycle assessment was used to calculate the environmental impacts of current and future strategies. For the design, we adapted and used a structured approach to engineering design to create new strategies for integrated manure management. It was concluded that mono-digestion of liquid manure reduced the environmental impact compared to conventional manure management, but has a low potential to produce bio-energy. Co-digestion with waste and residues, such as roadside grass, increased bio-energy production and further reduced the environmental impact. Co-digestion with substrates that compete with animal feed increased bio-energy production, but also the overall environmental impact from producing a substitute for the used co-substrate. Separating liquid manure into liquid and solid fractions with further de-watering of the liquid fraction increased the environmental impact compared to manure management without processing. A combination of separation and anaerobic mono-digestion of the solid faction reduced climate change and fossil fuel depletion. Segregating fattening pig urine and feces in the housing system reduced climate change, terrestrial acidification, and particulate matter formation and provided a sound basis for environmentally friendly manure management. Applying a structured design approach enabled the design of new strategies for integrated manure management that prevented pollution swapping. The approach proved to be successful because the environmental impact reduced throughout the manure management chain by at least 57% and more than doubled the nitrogen use efficiency compared to current North Western European manure management practices.

AB - Animal manure is a key component that links crop and livestock production as it contains valuable nutrients for the soil and crop. Manure is also a source of environmental pollution through losses of nutrients, such as nitrogen (N) and phosphorus (P), and losses of carbon (C). These losses are largely determined by the way manure is managed. Technologies to reduce nutrient and C losses from manure mainly focused on reducing a single emission while unwillingly increasing another emission at the same time; a phenomenon called pollution swapping. To prevent pollution swapping, we need to gain insight into the integral environmental consequences of technologies and use these insights to (re)design the manure management chain. The aim of this thesis, therefore, was to provide knowledge and insight into the environmental consequences of current and future strategies for manure management. The environmental consequences of the following technologies were assessed: mono- and co-digestion of liquid manure; high-tech separation of liquid manure with further dewatering of the liquid fraction; and segregating fattening pig urine and feces inside the housing system. Following, we designed new strategies for integrated manure management that prevent pollution swapping, and assessed the environmental consequences of these strategies. Life cycle assessment was used to calculate the environmental impacts of current and future strategies. For the design, we adapted and used a structured approach to engineering design to create new strategies for integrated manure management. It was concluded that mono-digestion of liquid manure reduced the environmental impact compared to conventional manure management, but has a low potential to produce bio-energy. Co-digestion with waste and residues, such as roadside grass, increased bio-energy production and further reduced the environmental impact. Co-digestion with substrates that compete with animal feed increased bio-energy production, but also the overall environmental impact from producing a substitute for the used co-substrate. Separating liquid manure into liquid and solid fractions with further de-watering of the liquid fraction increased the environmental impact compared to manure management without processing. A combination of separation and anaerobic mono-digestion of the solid faction reduced climate change and fossil fuel depletion. Segregating fattening pig urine and feces in the housing system reduced climate change, terrestrial acidification, and particulate matter formation and provided a sound basis for environmentally friendly manure management. Applying a structured design approach enabled the design of new strategies for integrated manure management that prevented pollution swapping. The approach proved to be successful because the environmental impact reduced throughout the manure management chain by at least 57% and more than doubled the nitrogen use efficiency compared to current North Western European manure management practices.

KW - dierlijke meststoffen

KW - mestverwerking

KW - milieueffect

KW - animal manures

KW - manure treatment

KW - environmental impact

M3 - internal PhD, WU

SN - 9789461738325

PB - Wageningen University

CY - Wageningen

ER -