James.Gaffey@staff.ittralee.ie Key drivers towards green biorefinery - - PowerPoint PPT Presentation

James.Gaffey@staff.ittralee.ie

James.Gaffey@staff.ittralee.ie

Key drivers towards green biorefinery project

• 30 cows from autumn calving dairy herd.
• Trials assess DMI milk yield, milk composition, rumen

health

• Environmental impacts: Measuring levels of N and P

and Methane emission study (RUmen SImulation TEChnque (RUSITEC)

Control Press cake Predicated DMI (kg DM/day) 21.64 21.64 CP% 18.6 15.9 NDF% 38.3 45.6 UFL 18.94 17.33 Control (n=15) Press cake (n=15) Grass silage 14 kg DM 5 kg DM Press Cake

• 9 kg DM

Concentrate 7.12 kg DM 7.12 kg DM Soya bean meal 0.44 kg DM 0.44 kg DM

Cattle feed trials: Silage v Presscake

Target: Reduce N and P emissions by 25%!

• Wet and dry feeding pig feed trials with

early finisher pigs

• Wet protein 15% DM approximately
• DMI, Average Daily Gain, Health &

Mortality, Dung consistency and pig/pen cleanliness

• Pig feed well received by pigs in wet

feeding

• More comprehensive dry pig feed planned
• Turning green protein in white protein?

Pig feed trials: Green protein as soya replacement

Future: Plant protein for humans

Target: Increase N-use effiency by 40%!

• High-value fructo-oligosaccharides in whey
• 30-70% of sugars in grass in form of FOS
• Concentration, separation, analysis and comparison with on-the-

market FOS

• Applications in animal nutrition to improve gut health or

cosmetics

• 95% of biogas produced by day 6
• Biogas potential somewhere between cattle slurry (28.8L/kg) and

fresh leachate from green compost (40.32L/kg)

• Possibility to co-digest with high carbon feedstocks
• Methane composition of gas >60%
• The P and K value of digestate suitable for fertilizer use

Grass whey to value

Residual stream to biogas

1 feedstock into 4 products

Reduced Emissions Protein optimisation Farmer Empowerment Cascading and product diversification Local socio-economic benefits Lower CAPEX Nutrient recycling

Advantages of small-scale grass biorefinery approach

Implementation on the farm

How small-scale biorefineries can work for farmers

20km2 20-30 farmers Distributed model Scale out not scale up Local model Celluose Plant Feeding mill Keep whey minerals and water on the farm Products used locally or upgraded centrally Suitable for fragmented supply chains

@BiorefineryGlas https://biorefineryglas.eu https://www.youtube.com/watch ?v=Z1UFHU-rt9s

James.gaffey@staff.ittralee.ie

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