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AD – the biorefinery of the future
Prof Anna Schnürer
Department of Molecular Sciences
Aerobic Digestion
CO2 + H2O
Heat O2
Organic material
Anaerobic Digestion (AD)
O2
Microbial degradation processes occurring in the absence of air
Methane
Organic acids
Alcohols
Hydrogen
Diols
Urban/Rural
Large and small-scale
Biogas
Established
Fertilizer
Anaerobic Digestion 2018
Waste
Future AD
Chemical platforms for
waste carboxylates
Komplex polymers
Organic acids,
Alcohols
Hydrogen
Carbon dioxide
Acetate
Methane
Carbon dioxide
Process
management and
input material are
determinative for
end product
ExtractionADAD Carboxylates
ConversionsPlatform chemicals
Picture modified from Layton et al 2016 Metabol Eng Com 3:245
Plastics
Rubber
Cosmetics
Food additives
Feed
Biomass for AD
Residues from
biofuel production
Food waste
Manure
Waste water
sludge
H2 via
windpower
Residues from
pulp and paper
Crop/
Crop residues
Algae
CO
CO2
H2
Acetate
Acetone
Ethanol
Butanol
Butandiol
…..and
Gases from gasification of wood and straw
Acetogens – key players
The future biorefinery
Organic matter
(Solid, Liquid,Gaseous)
“Carboxylates”Solid fraction
AD1 AD2
Methane
Nutrient
Protein (Feed)Platform chemicals
Energy