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Submitted on 16 May 2020
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LCA applied to residual organic fertilizing materials - An overview of emission inventory data at the spreading
operation
C. Déchaux, M. Pradel
To cite this version:
C. Déchaux, M. Pradel. LCA applied to residual organic fertilizing materials - An overview of emission inventory data at the spreading operation. Life Cycle Assessment and Other Assessment Tools for Waste Management and Resource Optimization, Jun 2016, Cetraro, Italy. 2016. �hal-02603621�
LCA applied to residual organic fertilizing materials An overview of emission inventory data at the spreading operation
Claire Déchaux, Marilys Pradel, Life Cycle Assessment and Other Assessment Tools for Waste Management and Resource Optimization, June 5-10 2016, Cetraro, Italy
National Research Institute of Science and Technology for Environment and Agriculture
CONTACT :
Claire Déchaux - claire.dechaux@irstea.fr Tél. +33 0(2) 23 48 21 10
www.irstea.fr
A research
project funded by Ademe
Member of AgorACV
Implication of the application of a residual organic fertilizing material in LCA
NO
3-C sequestration
Trace metal elements
29
Literature review
LCA case studies of residual organic fertilizing materials
(digestate, compost) including spreading
Details on land spreading emissions
N, P, C and trace metal emissions C sequestration
How are these emissions expressed at the spreading operation?
What are the units used?
Which emission rates?
Emissions linked to the application of residual organic fertilizing materials
Influence of the spreading emissions on LCA results
in the case studies
Main contributions
NH
3→ acidification
NH
3and nitrate → eutrophication
Learnings from the LCA literature review
Other less often detected contributions
N
2O → climate change
phosphate → eutrophication
NO
x→ particulate matter formation
N2O, NH3, NO3-, PO43- emissions more often considered than NOx, N2, C, trace metal elements in the case studies.
When possible, proposition of value ranges for P-based and N-based emissions. When not possible, variability has been highlighted.
Infrequent consideration of carbon fate and trace metals in LCA case studies.
A heavy impact of the inventory emissions on results recommendation for LCA practitioners to pay particular attention to the inventory emissions.
Great variability on:
-the emission rate values
-the different forms the emission is expressed
N
2O
direct Indirect
NH
3NO
xbiogenic CO
2N
2PO
43-Inventory issues at the spreading operation in LCA case studies
Infrequent but needed to check N balance consistency
Great sensitivity to
pedoclimatic conditions.
A pedoclimatic model should be used.
Expressed as a % of direct and/or indirect N2O emission produced during denitrification
Very low
considerations
Very low consideration
To explore ( toxicity and ecotoxicity)
Consensual value ranges from IPCC
Many sources air emissions: N, C
run-off and
leakage: N, P C sequestration
Trace metals
Spreading
operation
[1-25%] of Ntot[0,1-1,2%] of Ntot [8-9% of Ntot]
[0,1-2%] of Ntot
1% of NH3-N and NOx-N [0,75-2%] of NO3--N
[4-14%] of Cbio
[1,7-10%] of P
LCA applied to residual organic fertilizing materials An overview of emission inventory data at the spreading operation
Claire Déchaux, Marilys Pradel, Life Cycle Assessment and Other Assessment Tools for Waste Management and Resource Optimization, June 5-10 2016, Cetraro, Italy
National Research Institute of Science and Technology for Environment and Agriculture
CONTACT :
Claire Déchaux - claire.dechaux@irstea.fr Tél. +33 0(2) 23 48 21 10
www.irstea.fr
A research
project funded by Ademe
Member of AgorACV
Implication of the application of a residual organic fertilizing material in LCA
NO
3-C sequestration
Trace metal elements
29
Literature review
LCA case studies of residual organic fertilizing materials
(digestate, compost) including spreading
Details on land spreading emissions
N, P, C and trace metal emissions C sequestration
How are these emissions expressed at the spreading operation?
What are the units used?
Which emission rates?
Emissions linked to the application of residual organic fertilizing materials
Influence of the spreading emissions on LCA results
in the case studies
Main contributions
NH
3→ acidification
NH
3and nitrate → eutrophication
Learnings from the LCA literature review
Other less often detected contributions
N
2O → climate change
phosphate → eutrophication
NO
x→ particulate matter formation
N2O, NH3, NO3-, PO43- emissions more often considered than NOx, N2, C, trace metal elements in the case studies.
When possible, proposition of value ranges for P-based and N-based emissions. When not possible, variability has been highlighted.
Infrequent consideration of carbon fate and trace metals in LCA case studies.
A heavy impact of the inventory emissions on results recommendation for LCA practitioners to pay particular attention to the inventory emissions.
Great variability on:
-the emission rate values
-the different forms the emission is expressed
N
2O
direct Indirect
NH
3NO
xbiogenic CO
2N
2PO
43-Inventory issues at the spreading operation in LCA case studies
Infrequent but needed to check N balance consistency
Great sensitivity to
pedoclimatic conditions.
A pedoclimatic model should be used.
Expressed as a % of direct and/or indirect N2O emission produced during denitrification
Very low
considerations
Very low consideration
To explore ( toxicity and ecotoxicity)
Consensual value ranges from IPCC
Many sources air emissions: N, C
run-off and
leakage: N, P C sequestration
Trace metals
Spreading
operation
[1-25%] of Ntot[0,1-1,2%] of Ntot [8-9% of Ntot]
[0,1-2%] of Ntot
1% of NH3-N and NOx-N [0,75-2%] of NO3--N
[4-14%] of Cbio
[1,7-10%] of P
