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Dias nummer 1

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Jens Bo Holm-Nielsen. Afdelingsleder - Bioenergigruppen ... Holm-Nielsen J.B., Madsen M., Popiel P.O.: Predicted energy crop potentials for ... – PowerPoint PPT presentation

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Title: Dias nummer 1


1
Workshop - 23. august 2006 Skejby, Århus Dansk
Landbrugsrådgivning Landscentret Optimering
af biogasproduktion med fokus på energimajs -
Energiafgrødepotentiale til bioraffinering Jens
Bo Holm-Nielsen Afdelingsleder -
Bioenergigruppen Syddansk Universitet Esbjerg
Aalborg Universitet Esbjerg Niels Bohrs Vej 8-10,
DK-6700 Esbjerg Tlf. 7912 7715, mobil 2166
2511 E-mail jhn_at_aaue.dk Hjemmeside www.acabs.dk
www.sdu.dk/bio
2
Energy crops Paradigm shift through land
productivity and energy balance
  • The Sun as energy source
  • Special energy crops that use the
  • entire vegetation period
  • Total digestion of the whole plant
  • Nutrient cycle possible
  • Low Input High Output
  • Large installations work efficiently
  • and are friendly towards
  • the environment
  • Upgrading of biogas enables complete
  • utilisation of the crop (the gas can be
  • stored)

Digested plant residue
Fermenter
Biogas
Gas cleaning
Heat Electricity Fuel
3
Optimisation of the biomass production
Vegetation period Average intensity of the sun
radiation during the year (Simplified model for
Göttingen, Germany)
Sun light
KWh / m2
Month
The global sun radiation reaches an average of
approximately 1000 KWh/m2 in the southern part
of Niedersachsen, Germany. This energy is used by
green plants in the photosynthesis to create
biomass. At the end of Juli in modern agriculture
most of the fields are no longer green.There are
no longer active parts available to conduct the
photosynthesis. Demand In order to take full
advantage of the energy contained in the sun
radiation using photosynthesis, varieties that
are utilising the vegetation period to its
maximum should be developed and used. This means
green fields all year round.
4
Source Report from the Danish working Group on
the Co-existence of Genetically Modified Crops
with Conventional and Organic Crops (DJF, 2003)
5
Cultivation target stepwise increase of the
energy yield to approximately 100 in 10 years
Energy Maize
30 t/ha
Nowadays silo maize varieties
15 - 18 t/ha
Source KWS
6
Objective of the energy maize cultivation
  • Implementation of short-day genes
  • Cold tolerance in late varieties and late
    growing season
  • Nutrient / water efficiency, drought resistance
  • First variety announcement in 2005
  • Commerciel varieties available from 2007
  • (Source KWS)

7
Growth Progress of a Conventional Silo Maize (SM)
and an Energy Maize (EM) Clearly later
harvest of the Energy Maize
HarvestEM
GTM- yield/ha
FloweringEM
HarvestSM
Flowering SM
Time
Source KWS
8
Biogaspotentiale for udvalgte energiafgrøder
) Amon et. al. (2003) Optimierung der
Biogaserzeugung aus den Energiepflanzen Mais und
Kleegras
9
Biogaspotentiale for energimajs i Danmark
Forudsætninger TS 1,10 x VS methanudbytte
290 L per kg VS methanandel 55 Vol-
10
Biogaspotentiale for energimajsafgrøder
Kilde Amon et. al. (2003) Optimierung der
Biogaserzeugung aus den Energiepflanzen Mais und
Kleegras
11
Biogaspotentiale for energimajsafgrøder
Kilde Amon et. al. (2003) Optimierung der
Biogaserzeugung aus den Energiepflanzen Mais und
Kleegras
12
Perspectives for crop cultivation
Effect of the variety and the ripeness on the
methane production
Source AMON et. al. 2003
280
260
CH4 Nl/kgTM
240
Sort B
Sort R
220
Sort P
Sort A
200
Sort S
180
15
20
25
30
35
40
45
50
55
Source KWL
GTS
Source KWS
13
LP92_ Wesel, 90 BC1S1-lines from (5G3552 x Mex)
x Flinttester 10 Standards
Source KWS
14
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World energy scenarios Goals for the future
22
Konklusioner Methanudbyttet fra energimajs er
stærkt afhængigt af dyrkningsoptimering og
Høsttidspunktet.
  • Energiafgrøder er et upåagtet eller et endnu ikke
    værdsat, uopdyrket område med et stort potentiale
    indenfor biogasproduktionen i Danmark.
  • Der har siden år 2000 foregået en kraftig og
    interessant udvikling i Tyskland og Østrig. I
    Østrig er der etableret ca. 200 gårdbiogasanlæg
    frem til 1/7 2006 efter en specifik ordning der
    sattes i kraft i 2003. Det største område
    indenfor afgrøder er majsensilage og græs
    anvendelse, omsat i biogasanlæg sammen med
    husdyrgødning eller som rene energiafgrødeanlæg.
  • Der er en spændende udfordring foran os, hvor
    landbrugets primærproduktion, er råvareleverandør
    af husdyrgødning og afgrøder, så biogasanlæg
    primært kan omsætte gårdens egene produkter.
    Dermed kan man evt. nedtrappe leverancerne af
    organisk industriaffald.
  • Med husdyrgødning og afbalanceret afgrøde tilsats
    er biogasudbytter på 35-40 m3 biogas/m3 biomasse
    opnåelige.
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