Industrial Symbiosis With Biofuels
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Industrial Symbiosis in Biofuel Industries:
A case for improved environmental and economical performance
Michael MartinEnvironmental Technology and Management
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What do you know What do you know about biofuels?about biofuels?
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Problems with Biofuel Production
• Biofuel production systems have questionable performance
• Food vs. Fuel Debate• Depletion of Rainforests• Which vehicle to choose?• Are they really green?• CO2 Emissions equivalents?
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Social and Ethical Biofuel Issues
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Food vs. Fuel Debate
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Media and some academics only see the problems.EnvironmentalEconomicEnergy
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What are biofuels What are biofuels and how are they and how are they produced?produced?
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“Biofuels for Transport”
Vehicle fuels derived from biomass and wastes•Solid•Liquid•Gas
Replacement of traditional/conventional fuels•Total substitution•Partial (blending)•Dual Fuel
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1st vs. 2nd Generation BiofuelsFirst Generation Biofuels
•Common•Produced from allocated feedstocks
Second Generation Biofuels•Created from ligno-cellulose •Not common•More development needed•HUGE POTENTIAL!
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3 Main Fuels for Transport– Ethanol– Biodiesel– Biogas►SVO, Pure Vegetable Oil
Biofuels for Transport
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Sugar Rich Crops• Sugar cane• Sugar beets
Starch Rich and Cereals• Sorghum• Sweet Potatoes• Wheat• Corn (Maize)
Ethanol Raw Materials
Cellulosic Crops Abundant…
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Ethanol Production Process
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Ethanol Production Material/Energy Flows
• Other chemicals to balance pH• Biogas from waste water treatment• Heavy alcohols• Fats from Seeds and Grains
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Raw Materials• Sunflower Oil • Rapeseed (Canola)• Waste Cooking Oils• Animal Fats• Soybean Oil• Jatropha• Cashews• Algae• Etc....
Biodiesel Raw Materials
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Biodiesel Production
Production• Transesterification of oils and fats• Seperate glycerin and methyl esters• Uses Methanol or Ethanol and catalysts
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Biodiesel Production Material/Energy Flows
• Heating done with electricity, water or other means• Methanol Recovery• Glycerol produced contains some chemicals• Biomass from plants
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Raw Materials• Manure• Food Residues• Biomass• Sewage• Landfills• Glycerin• Rubber• Fats
Biogas
Mats Eklund and his V70 Bi-fuel
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Biogas Production
• Anaerobic fermentation of organic matter• Produces methane and CO2
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Biogas Production Material/Energy Flows
• Smuggled Booze• Cloetta Chocolate• Arla Products• Scandic West and Restaurant wastes
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How can biofuels improve How can biofuels improve their environmental & their environmental & economic performance? economic performance?
Industrial SymbiosisIndustrial Symbiosis
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Industrial Symbiosis for Biofuel Production
• Make use of material and energy flows• Outputs can be used as raw materials• External Industries for Biofuel Raw Materials
and Ouputs• Energy/Material Cascading• Synergies
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What are Synergies?
•syn-ergo– Greek for “Working together”– Several Parts Final outcome greater than sum of the parts
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What are typical biofuel synergies?
• Using ethanol for biodiesel production• Using glycerol for biogas production• Ethanol stillage used for biogas production• Biogas digestate used as biofertilizer for biofuel crops• Pelletizer from ethanol production used to pelletize biogas
digestate• Oil/Fat from ethanol production used for biodiesel
production• Flue gases from biogas plant taken care of at ethanol
facility• Materials cascaded (Corn example)• Combined capture/use of CO2• Waste heat used for subsequent processes
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Bad Example, No Symbiosis: U.S. Ethanol & Stand Alone Plants
• Use Coal and Oil for Fuel• Questionable Energy Efficiencies• No conection to other industries• Run by incentive programs
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Bettering the Ethanol in USA(Material Cascading Synergies)
PressingPressing ++CornMeal
EthanolEthanolProductionProduction
BiodieselBiodieselProductionProduction
Digestate
Digestate
GlycerolGlycerol
EthanolEthanol
DistillersDistillersGrainGrain
Organic FluidsOrganic Fluids
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Regional Biofuel Industries
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Norrköpings Industrial Symbiosis
AgroetanolSvenskbiogas
HolmenPaper
GraphicPackaging
E.ON
Norrköpingskommun
Econova
Tidnings-Retur
drank
ånga
fordonsgas
fordonsgas
biogas
hh-avfall
fjärrvärme
biobränsle
aska
vs-avfall
slam
rejekt
returslam
fiberslam
slam
tidningar
Jordbrukvete
gödsel
SwedenBioenergy
glycerol, rester
rapskaka
ILRecycling
Göran ÅrsjöDäckstommar
Colmec
gummi
däckstommar
Cleanawayetiketter, lim
Returpack
PET-flaskor
Rosti-primpac
PET
tidningar
kartong
Skogsbruk
flis
flis
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Regional Agriculture
Linköping and Surrounding CommunitiesG
lyce
rol
Raps
Oil
BiomassWheat
Grains
Manure
Methanol
CHP Plant
Fodder
Still
age
Biomass
Greenhouse
Heat, Electricity & Steam
Seedcake
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The Biogas Concept:Wastes to Winnings
=
CHCH44
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Improved Performance with Integrated Biogas Systems
• Cascading = Energy + Economics•• Why not pure biogas?Why not pure biogas?
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Biofuel Synergies in Tanzania
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Synergies and Symbiosis with External Industries
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Biofuel Industry→ External Industry Synergies
Waste water from biodiesel or ethanol production used for Salix production
Waste heat from ethanol, biodiesel and biogas used in nearby greenhouses
C02 trapped from Ethanol, Biogas production for Greenhouses
Wet Stillage used for Animal Feed Direct (no drying)Glycerol used as binding agent for wood pellets
Glycerol used as a carbon source in biological cleaning steps
C02/Water from Ethanol production for Algae Production
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Potato Chip Waste Biofuels
++
EthanolEthanolProductionProduction
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Biodiesel
Biogas
Oil Extractor
Cashew Tree
Cashew Fruit & Nut
Oil
PVO Generator
Biodiesel Processing
Digester
Press Cake
Animal Feed
Low Quality Cashews for Biodiesel
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Ethanol Systems Perspective
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Effects on Energy Balance,Pål BörjessonOption 1: Energy Balance, 1.2
– Current Production Systems– All Energy allocated to ethanol
Option 3: Energy Balance, 1.7– Future Production Systems– Increased use of waste heat– All energy allocated to ethanol
Option 8: Energy Balance, 5.2– Current Production Systems– Hay used to provide heat and energy– Energy input from ethanol and malt pellets– Use of some malt to offset protein fodder imports
(Börjesson, 2007)
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Ethanol
MaltPellets
FodorHeating
Harvest
Prod.
Energy In Energy Out
2.0
5.45
Option 6, Energy Balance = 2.7
Systems Performance:Good Example
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Systems Performance: Best Case Example
Soy ProteinSoy ProteinFeedFeed
Energy In: 0.76 Energy Out: 7.2
Energy Balance: Energy Balance: 9.29.2
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CO2 Storage/Combustion from Industries
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The Future?:C02 and Heat Algae
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Conclusions
• Economical Benefits• Environmental Performance• Carbon Capture Potential• Efficient use of Materials and Energy• Better view of biofuels