Social and Economic Issues of Pyrolysis Processing Systems and Biochar
Potential of Biochar in Growing Media · 2019-06-25 · Biochar; a carbonaceous solid product of...
Transcript of Potential of Biochar in Growing Media · 2019-06-25 · Biochar; a carbonaceous solid product of...
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Potential of Biochar
in
Growing Media
Dr Munoo Prasad
Consultant
Irish Nursery Stock Conference October 24th 2018
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Potential of Biochar in Growing Media
Biochar Production
Biochar Properties
Biochar Applications
Growing Trials – In House
– External
Seedling Production
Herbs/Tomatoes
Nursery stock
Green roof
Disease Suppression
Environmental Benefits
Greenhouse Gases
Conclusion
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Biochar; a carbonaceous solid product of pyrolysis
Few material that actively removes carbon from the atmosphere
Suitable for a range of agricultural use e.g. animal feed, environmental e.g.
filter and horticultural e.g. growing media
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• Biochar Effect on plants can be Positive, Neutral and
Detrimental
• Biochar production process can be tailored to form “Designer Compost” that has specific chemical and physical characteristics
• At this stage we do not know all the characteristics
that is most suitable for use as a growing media
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Improves nutrient availability by increasing cation
exchange capacity, captures nitrate
Physical properties/water retention, saturated
hydraulic conductivity and aeration depending on
particle size.
Increases pH
Increases physical and chemical stability
Fine dust- must be moistened before use
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pH
Feedstock, “green" our data, other published data
pH of various biochars destined for use as a
component of growing media
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EC dS/m
Feedstock “green " our data" other published data
EC of various biochars destined for use as component of
growing media
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EC
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Feedstock“green" our data other publishrd data.
Note one very high figure omitted
EC of various biochars destined for use as a component of a growing media
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Effect of biochar addition on electrical
conductivity of peat-biochar mixtures
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week 1 week 6 56 weeks 106 weeks
Extr
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N m
g/L
Time ( not on scale)
Nitrogen dynamics over 2 years with biochar added to peat at 10% v/v
Control
Woodchips
Forest screenings
Forest wood
Husk & paper fibre
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A C D HPS
M2/g
Biochars
SURFACE AREA OF SOME BIOCHARS
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P-commercial P 100 P:Carbon Terra 5% P:Carbon Terra 10% P:Carbon Terra 15% P:Carbon Terra 20%
P-commercial P 100 P:Schmidt 5% P:Schimidt 10% P:Schmidt 15% P:Schmidt 20%
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Effect of root length in peat-biochar mixtures in
comparison to peat
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1=Peat Control, 3=Peat +14% Biochar 4= Peat+ 28% Biochar 6= 25%Biochar+25%
Perlite
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Use of Biochar in Green Roof
Reduced the quantity of run-off
Improved the quality of run-off
Need to take into account variable properties of
biochar
Improved the water retention
Decrease in total N in run-off
Decrease in total Phosphate in run-off
Decrease in total NO3 in run-off
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Control M400 M550 M700
mg C
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f dry
peat
Maple biochar at different temperatures
The effect of addition of maple biochars to peat at 15% on Nitrous Oxide emission(Potency 300 to 400 times
Carbon dioxide)
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Control M400 M550 M700
mg C
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peat
Maple biochar at different temperatures
The effect of addition of maple biochars to peat on Methane emission( Potency 20 times CO2)
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Biochar treatments Control M400 M550 M700
mg C
/kg o
f dry
peat
Maple biochar at different temperatures
The effect of addition of maple biochars to peat at 15% on Carbon dioxide emission
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Conclusion
Change to biochar at Nursery level will not occur unless there is financial incentive from government ( Carbon Credits) or market incentive.
Financial incentives may include the proximity of Biochar, therefore reduction in transport costs
Financial returns for carbon sequestration if nurserymen or pyrolyser group together
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NOT ALL BIOCHARS ARE MADE EQUAL !!
POTENTIAL TO PRODUCE PLANTS WITH LOWER
CARBON FOOTPRINT
“CLIMATE SAVING” GROWING MEDIA
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THANK YOU FOR YOUR ATTENTION!