sustainable supply chains in a circular...
TRANSCRIPT
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www.sustainable-systems.org.uk
253 × 109 - jobs.ac.uk
Adisa Azapagic
The University of Manchester
Sustainable supply chains in a
circular economy
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Overview
Introduction
Systems approach and life cycle thinking
“Circularity” vs “sustainability”
Illustrative examples
Food waste
Energy-using appliances
Packaging
Conclusions
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Circular economy
Regenerative and restorative by design
Keep products and resources in use as long as
possible
Extract the maximum value while in use
Recover and regenerate products and resources at
the end of life
EMF (2015)
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REGENERATIVE RESTORATIVE
Circular economy
EMF (2015)
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Sustainable supply chain
Economically viable
Environmentally benign
Socially beneficial ©Adisa Azapagic and Slobodan Perdan
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Systems approach and life cycle thinking
Resources
Social impacts
Env’l impacts
Social benefits
Economic
costs Economic
benefits
©Adisa Azapagic
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Sustainable supply chain in a circular economy
Regenerative and restorative by design
Keep products and resources in use as long as
possible
Extract the maximum value while in use
Recover and regenerate products and resources at
the end of life
EMF (2015)
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Food waste
To digest, compost, burn or bury?
7.3 Mt/yr of household food waste generated in the UK of
which 4.9 Mt is managed
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Resource recovery from food waste
Electricity
Household
food waste
(4.9 Mt/yr)
Landfill
Incineration Electricity
Anaerobic
digestion Fertiliser
Electricity
In-vessel
composting Compost
Resources Env’l
impacts
Slorach et al., Sci.Tot. Env. 693 (2019) 133516.
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Environmental impacts (per tonne)
-40
-30
-20
-10
0
10
20
30
Carbonfootprint
Acidification Eutrophication Human toxicity Marine ecotox. Particulates
Anaerobic digestion Incineration In-vessel composting Landfill
19-3
0 x
26-4
3 x
6-1
0 x
8-1
3 x
Not to scale
Slorach et al. ,Sci.Tot. Env. 693 (2019) 133516.
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Summary
In-vessel composting is the worst option for most impacts In this case “circular” does not translate into “sustainable”
Anaerobic digestion is the best option for the carbon footprint and most other impacts
However, it has much higher acidification and particulates (PM10)
Much greater benefits would be achieved through waste prevention (several orders of magnitude)
Slorach et al.. Sci.Tot. Env. 693 (2019) 133516.
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REGENERATIVE RESTORATIVE
Restorative
EMF (2015)
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Circular economy concept
Regenerative and restorative by design
Keep products in use as long as possible
Extract the maximum value while in use
Recover and regenerate products and resources
at the end of life
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Restorative by design
Vacuum cleaners
200 M vacuum cleaners are in use in the EU, with 45 M sold annually
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Annual impacts in the EU
11
31
58
37
8
20
0
10
20
30
40
50
60
70
Gallego-Schmid et al., Sci.Tot. Env. (2016) 559 192-203.
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Eco-design: Improving energy efficiency
0.0
0.5
1.0
1.5
2.0
2.5
W/O eco-design With eco-design
Gallego-Schmid et al., Sci.Tot. Env. (2016) 559 192-203.
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Eco-design: Improving material efficiency
Gallego-Schmid et al., Sci.Tot. Env. (2016) 559 192-203.
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Disassembly analysis
Product disassembly characterisation Outcomes
Total number of pieces 150
Pieces theoretically not required 41
Number of task repetitions 313
Number of tool manipulations 116
Number of non-value-added tasks 104
Mendoza et al., J. Ind. Ecol. (2017) 526-544.
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8 types of plastics (2.3 kg) 6 types of metals (1.2 kg) Cardboard (packaging; 0.9 kg)
Materials in a vacuum cleaner
15 types of materials (total 4.4 kg)
Mendoza et al., J. Ind. Ecol. (2017) 526-544.
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0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Reversible joints
Same material joints
Parts with label
Recyclable materials
Painted surfaces
Eco-design: Improving circularity
Mendoza et al., J. Ind. Ecol. (2017) 526-544.
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CE in practice for vacuum cleaners
Long
lasting
product (20
years)
Recyclability
Size reduction
Second-hand products
Take-back systems
Sustainable
materials
Easily replaceable
components
Recycled content
Low-impact
materials
Easy disassembly
Plastics from the sea
High recyclability
Availability of spares
Reverse supply chain
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Circular economy concept
Regenerative and restorative by design
Keep products in use as long as possible
Extract the maximum value while in use
Recover and regenerate products and resources
at the end of life
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Reuse or recycle?
Fizzy drinks packaging
1.5 Mt CO2 eq./yr emitted from the UK fizzy drinks sector
13% of the GHG emissions from the whole F&D sector
Amienyo and Azapagic, Int. J. LCA (2013) 18 77–92
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555
312 293
151
414
248
174
74
0
100
200
300
400
500
600
Glass bottles (0.75 l) Aluminium cans(0.33 l)
PET bottles (0.5 l) PET bottles (2 l)
Carb
on
fo
otp
rin
t (g
CO
2eq
./l)
Total Packaging
Carbon footprint of fizzy drinks
35%
recycle
d
48%
24%
Amienyo and Azapagic, Int. J. LCA (2013) 18 77–92
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Reusing glass bottles
0
100
200
300
400
500
600
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
Ca
rbo
n f
oo
tpri
nt
(g C
O2
eq
./l)
Amienyo and Azapagic, Int. J. LCA (2013) 18 77–92
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Reuse or recycle?
555
312293
151
237
151
0
100
200
300
400
500
600
Glass bottles (0.75 l) Aluminium cans(0.33 l)
PET bottles (0.5 l) PET bottles (2 l)
Carb
on
fo
otp
rin
t (g
CO
2eq
./l)
Used 4
x
25
x
Amienyo and Azapagic, Int. J. LCA (2013) 18 77–92
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Recycling PET bottles (0.5 l)
293
197
152
0
50
100
150
200
250
300
350
24%R; 76%L* 40%R; 60%L 60%R; 40%L
Carb
on
fo
otp
rin
t (g
CO
2eq
./l)
Amienyo and Azapagic, Int. J. LCA (2013) 18 77–92
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Reuse or recycle?
555
312293
151
237197
151 152
0
100
200
300
400
500
600
Glass bottles (0.75 l) Aluminium cans(0.33 l)
PET bottles (0.5 l) PET bottles (2 l)
Ca
rbo
n f
oo
tpri
nt
(g C
O2
eq
./l)
Used 4
x
25
x
40
% r
ec.
60%
Amienyo and Azapagic, Int. J. LCA (2013) 18 77–92
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Summary
It pays to reuse glass bottles
Benefits ‘fizzle out’ beyond 3-4 times
Reusing glass 7 times comparable to
recycling 40% of plastic bottles
Larger plastic packaging still better than
glass used 25 times
Amienyo and Azapagic, Int. J. LCA (2013) 18 77–92
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Single-use plastics:
To ban or not to ban?
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Food containers: Single-use vs reusable
500-850 million units/yr used and disposed in the EU
Gallego-Schmid et al., J. Cleaner Prod. (2018) 211 417-427
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End-of-life management (EU28)
Polypropylene
11% recycled, 44% incinerated and 45% landfilled
Aluminium
54% recycled and 46% landfilled
Extruded polystyrene
50% landfilled and 50% incinerated
Gallego-Schmid et al., J. Cleaner Prod. (2018) 211 417-427
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Life cycle impacts of single-use containers
Not to scale
0
50
100
150
200
250
300
350EPS Al PP
Gallego-Schmid et al., J. Cleaner Prod. (2018) 211 417-427
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Life cycle impacts of single-use containers
EPS
7% to 28 times lower impacts than aluminium
25% to six times lower than polypropylene
Less EPS needed than PP and less
energy used than for aluminium
Gallego-Schmid et al., J. Cleaner Prod. (2018) 211 417-427
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Single-use vs reusable container
Impact
Carbon footprint 18 11
Resource depl. 208 3
Acidification 29 8
Eutrophication 18 14
Human toxicity 37 2
Marine ecotox. 24 4
Ozone depletion 27 1
Summer smog 16 9
Number of uses of reusable PP containers needed to equal the
impacts of single-use containers
vs vs
Gallego-Schmid et al., J. Cleaner Prod. (2018) 211 417-427
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Summary
Single-use, non-recyclable EPS has the lowest life
cycle environmental impacts
Single-use polypropylene container is the worst
option for most impacts
Reusable PP container needs to be reused 16-208
times to match the single-use EPS container
Recycling of EPS is technically possible but costly
In this case, “circular” does not translate into
“sustainable”
Gallego-Schmid et al., J. Cleaner Prod. (2018) 211 417-427
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Conclusions
Most supply chains are not designed for a circular economy
We still need to understand better when “circular” is “sustainable”
The systems and life cycle approaches are essential
Implementation of CE will be challenging but is achievable
Drivers are increasing
Methods and evaluation tools are available
Technologies are developing (slowly)
More success stories are needed to stimulate the uptake
Legislation will need to get tougher
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Acknowledgements
Alejandro Gallego Schmid
David Amienyo
Harish Jeswani
Joan Fernandez Mendoza
Peter Slorach
Rosa Cuéllar-Franca
EPSRC
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References
Amienyo, D., H. Gujba, H. Stichnothe and A. Azapagic (2013). Life cycle environmental impacts of soft carbonated drinks. International Journal of LCA 18(1) 77-92.
EMF (2015). Delivering the Circular Economy - A Toolkit for Policy Makers. Ellen MacArthur Foundation (EMF), Isle of Wight.
Gallego-Schmid, A., J. M. F. Mendoza, H. K. Jeswani and A. Azapagic (2016). Life cycle environmental impacts of vacuum cleaners and the effects of European regulation. Science of the Total Environment 559 192-203.
Gallego-Schmid A., J. M. F. Mendoza and A. Azapagic (2019). Environmental impacts of takeaway food containers. Journal of Cleaner Production 211 417-427.
Mendoza, J.M.F., M. Sharmina, A. Gallego-Schmid, G. Heyes, and A. Azapagic (2017). Integrating backcasting and eco-design for the circular economy: the BECE framework. Journal of Industrial Ecology 21 526–544.
Slorach, P. C., H. K. Jeswani, R. Cuéllar-Franca and A. Azapagic (2019). Environmental and economic implications of recovering resources from food waste in a circular economy. Science of the Total Environment. 693 133516.