Wheat for distilling and bioethanol: Developments in …...NIR calibration for alcohol yield well...
Transcript of Wheat for distilling and bioethanol: Developments in …...NIR calibration for alcohol yield well...
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www.adas.co.uk
Wheat for distilling and bioethanol:
Developments in 2007
Richard Weightman, ADAS BoxworthWIGN Stakeholder meeting 29/11/07
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Agenda
Development in the biofuels marketProgress understanding variety effectsAlcohol productivity and N effectsSummary of projects completed in 2007New bioethanol projects
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Planned UK bioethanol plants
Requirements for wheat
British Sugar
Existing: Scottish Distillers, 700 kt
Ensus: 1000 kt
GSF (2): 700 ktRoquette: 300 ktBioethanol Ltd: 325 kt
Losonoco: 360 kt
Vireol: 500 kt
GSF (1): 350 kt
BP/ABF: 1000 kt
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Planned UK bioethanol plants
Company Req for wheat (kt) Predicted EtOH prod (kt) ExpectedGSF (1) 350 105 Late 2008GSF (2) 700 210 Late 2009Roquette 300 100 Late 2008Bioethanol Ltd 325 100 2008 ??Vireol 500 150 2008Losonoco 360 110 2008Ensus 1,000 325 Late 2008BP/ABF 1,000 330 Late 2009Total 4,535 1,430
British Sugar - 55 Late 2007
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Spain - Abengoa
Plans next year for purchase of 250,000 tonnes of UK wheat under contract
An existing market which justifies understanding the quality of wheat for bioethanol
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Will premia be paid for high AY ?
US - Monsanto/FOSSSignificant developments in 2007
UK- CentaurSweden – AgroetanolSpain - Abengoa
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Sweden – Agroetanol
Protein: 9-11%Moisture: below 15% at harvest (or 14.5% post
harvest) no correctionSpecific weight: over 750 g/l no correctionStarch: up to 71.0% = base price
From 71.1% added payment of 1.5% per % starch71.1-71.5% starch = +0.75%71.6-72.0% starch = +1.5% etc
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UK Centaur bioethanol contract
Starch premiumBasic starch content 60% (no premium)Premium £0.25 per 0.5% starch (up to max of 70% starch)
… assume these are on an ‘as is’ basis (85%DM)
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Previous WIGN meeting 2006
What drives alcohol yield ?Measuring and Predicting alcohol yieldEffects of VarietyEnvironmental influences
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Wheat: benchmark analysis
sugar3.0%
starch69.0%
NSP11.0%
protein11.5%
lignin1.0%
oil2.5%
ash2.0%
HGCA review no 61
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Varieties and starch vs protein
65.0
67.0
69.0
71.0
73.0
75.0
77.0
79.0
81.0
83.0
85.0
5 6 7 8 9 10 11 12 13 14 15
Protein (Nx5.7 %)
Star
ch M
egaz
yme
(%)
BrigadierCadenzaCaxtonConsortHavenHerewardMerciaReaperRialtoRibandSljepnerSoissonsSpark
Benchmark wheat (11.5% protein, 69% starch)
Source: Moss et al. (1999) HGCA report 182
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Varietal effects on alcohol-protein relationship
400410420
430440450460
470480
7 8 9 10 11 12 13 14
Protein %DM
AlchemyClaireConsortDicksonGlasgowHyperionIstabraqKiplingNijinskyRobigusPiranhaZebedeeV i Al h
2005Alcohol yield (l/t)
[Data: SWRI, 2005; analysis DK]
We assume the alcohol yield:protein relationship is the same for all varieties
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Variety effects
Why do some varieties consistently outperform in terms of alcohol yield ?
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Assessing wheat varieties for alcohol yield
390
400
410
420
430
440
450
460
9 10 11 12 13 14
Grain Protein (%)
Alc
ohol
yie
ld (l
/tonn
e)
Variety 1Variety 2Variety 3variety 4Variety 5Variety 6Variety 7Variety 8Variety 9Variety 10
Objective 2 compare varieties across N rates
Objective 1 compare varieties at same grain N content
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Why is Riband a good distilling wheat ?
420
430
440
450
460
470
480
5 7 9 11 13
Grain protein (g/100 g DM)
Alc
ohol
yie
ld (l
/tonn
e D
M)
(b)
Riband
Option
Riband – good, traditional soft distilling variety
Kindred et al. 2007, J. Cer. Sci doi 10.1016/j.jcs.2007.07.010
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Why is Riband a good distilling wheat ?
66
68
70
72
74
76
78
5 6 7 8 9 10 11 12 13
Grain protein (g/100 g DM)
Star
ch (g
/100
g D
M)
(c)Riband
Option
Riband – 3% higher starch content at a given level of protein
Kindred et al. 2007, J. Cer. Sci doi 10.1016/j.jcs.2007.07.010
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Summary of variety effectsOption Riband sig
Alcohol yield (L/t) 445 454 (***)Starch (g/100g) 69.9 73.0 (***)Total protein (g/100g) 9.93 9.63 (*)
TGW (g) 44.8 50.0 (***)Grain width (mm) 3.9 4.2 (***)Grain l:w ratio 1.72 1.62 (***)
Vitreous grains (%) 16.3 12.2 (ns)
Alcohol/starch (L/10kg) 6.37 6.23 (*)Gliadin (%) 42.5 40.9 (*)
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Conclusions: Riband
High alcohol yield in Riband associated with:More starch at a given level of proteinLarge well filled grainsSmall grain l:w ratio
No interactions between variety and N for any trait
but…
Glasgow (good distilling wheat) does not have large grains
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Variety effects
More work required to understand variety effects……
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Sustainable biofuel production
Alcohol yield per tonne, or per hectare ?
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Alcohol yield/ha driven by grain yield
5
6
7
8
9
10
11
0 50 100 150 200 250
N Rate (kg/ha)
Gra
in y
ield
(t/h
a)
(a)
2000
2300
2600
2900
3200
3500
3800
0 50 100 150 200 250
N Rate (kg/ha)
Alc
ohol
yie
ld (l
/ha)
(b)
Kindred et al. 2007, J. Cer. Sci doi 10.1016/j.jcs.2007.07.010
Riband
Option
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Sustainable biofuel productionFertiliser very important for GHG emissions (manufacture & in-field GHG emissions)
Optimum N rates to maximise GHG savings substantially lower than to optimise yield
Increasing productivity (e.g. by breeding) will be very important in reducing GHG intensities per t of grain, and getting maximum production off limited land area
Displacement of agricultural activity onto virgin lands (e.g. forest or grassland) gives enormous CO2 releases
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Recently completed ADAS projects on biofuels
HGCA project report No. 417 Optimising nitrogen applications for wheat grown for the biofuels market
HGCA review No. 61 Wheat as a feedstock for alcohol production
HGCA review No. 66 Opportunities and implications of using the co-products from biofuel
production as feeds for livestock
Levy funded
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Ongoing: GREEN grain ProjectGenetic Reduction of Energy use and Emissions of Nitrogen through cereal production
y = -5.3979x + 504.03R2 = 0.8898
400410420430440450460470480490
5 6 7 8 9 10 11 12 13 14Protein % (by NIR)
Alc
ohol
yie
ld (b
y N
IR)
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Ongoing: Grain size and shape
PhD studentship, University of Manchester‘Understanding and predicting the determination of alcohol yield from wheat’
Mabille & Abecassis model (2003) volume & surface area… can such models be adapted to predict alcohol yield
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New ADAS projects on bioethanol
RD-2005-3176 Maximising the yield of high value components from wheat by fractionation
RD-2006-3314 Maximising bioethanol yield of UK wheat: Effect of non starch polysaccharides in grain
RD-2007-3348 Triticale – opportunities as a low input cereal for bioethanol production
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ConclusionsUK wheat shows potential for high alcohol yields (ca. 480 L/tonne) – competitive with US maize
NIR calibration for alcohol yield well advanced
Agronomy key to maximising benefits of biofuels by min. GHG emissions
Breeding for yield important for max alcohol production per hectare (and min GHG/t of grain)
Breeding for starch content key to producing high quality feed stock