1. 1. IEE/13/477/SI2.675801 Legal disclaimer: The sole responsibility for the content of this publication lies with the authors. It does not necessarily reflect the opinion of the European Union. Neither the EACI nor the European Commission are responsible for any use that may be made of the information contained therein. Sustainable small-scale biogas production from agro- food waste for energy self-sufficiency Noel Gavigan IrBEA Executive Biogas Workshop, 21st May 2015 Springhill Court Hotel, Kilkenny Irelands National Sustainable Food Programme
2. 2. www.biogas3.eu Promoting Bioenergy Policy positions development Consultations to Government & Europe Conferences, Workshops Biomass Trade Centres Wood Fuel Quality Assurance Scheme Participation in projects www.irbea.ie IrBEA Snapshot 210 Members Non Profit Organisation Representing BioEnergy in Ireland since 1998 5 Subgroups Anaerobic Digestion Renewable Heat Incentive Wood Fuel BioFuels Electricity (REFIT & Grid) Energy Crops 5 part time staff in two offices (Carlow and Belfast) . IrBEA Work 2
3. 3. www.biogas3.eu EU Funded Project Biogas plants to suit farms and food processors without effecting current operations Using cow slurry to provide gas onsite for milking operations (hot washing, milk cooling) Converting food processing waste (whey, off spec product etc..etc..) to biogas for process heating / cooling / electricity Using pig slurry to provide onsite gas for building heating
4. 4. www.biogas3.eu The team of BIOGAS3 Partner Organisations: AINIA, FIAB (Spain) ACTIA, IFIP (France) TCA, DEIAFA (Italy) RENAC (Germany) FUNDEKO (Poland) JTI (Sweden) IrBEA (Ireland) EVENT NAME. Place, xx/xx/xxxx
5. 5. www.biogas3.eu Animal by- products What is Anaerobic Digestion / Biogas Anaerobic Digester Vegetative Matter Electricity Heat Vehicle FuelDigestate, Nutrients Liquid Fertiliser BIOGAS (50-70% Methane)
6. 6. www.biogas3.eu
7. 7. www.biogas3.eu Typical Industrial scale Biogas Plant 250kwe 5MWe scale Capital Expenditure of 4-5m / MW Feedstocks: Energy Crops Feedstocks: Waste Materials Feedstocks: 10,000 tonnes to 200kt Currently 4 in operation in Ireland 1 under construction/commissioning Potential for 10-15?
8. 8. www.biogas3.eu Developing World Digesters
9. 9. www.biogas3.eu Example of a farm small-scale biogas plant Small-scale biogas plant (self-built, low-cost). Feedstocks: cattle slurry, whey, pig slurry Energy use: heat for the housing and the cheese plant. Digester: 150m3 concrete tank Gas Use: 50kW boiler heating for cheese manufacture & homestead Gas production : 150-180m3 biogas/day Investment: 35,000 150 m3biogas/day x 5 kWh/m3biogas x 365 day/year x 0.03 /kWht x 0.8 (boiler yield) = 6,570 /year Assuming O&M costs equivalent to 5% of investment per year: 1,750 /year Benefit = 6,570 1,750 = 4,820 Estimated payback period = 7 years Data obtained from a report of BIOREGIONS project (www.bioregions.eu) Fahringer farm, Rettenschss (Austria)
10. 10. www.biogas3.eu Example of a food waste small-scale biogas plant Data from SEAB energy (seabenergy.com)University of Southampton Science Park (UK) Small-scale biogas plant, containerized, by SEab Energy Ltd (Model Muckbuster) Feedstocks: 410 L/day of kitchen food waste, cooking oil and spent alcoholic drinks. Energy use: electricity and heat used in the business park offices and research labs. Biogas valorisation unit: 8kW CHP engine. Biogas production: 46m3/day Electricity production: 35MWh/year Investment: 120,000 Annual operation and maintenance costs: 6,000 Energy savings: 3,380 Heat savings: 1,810 Waste management savings: 12,470 Digestate value: 1,170 Payback period: 4 years (with feed-in tariffs). Estimated in 9 years without feed-in tariffs. In this case, the power of the biogas plant is under-used. The plant has the capacity to produce 64MWh/year and it is only producing 35MWh/year. At full load, the payback period without feed-in tariffs would be reduced to 7 years.
11. 11. www.biogas3.eu Further Examples - Recommended Reading RASE Report on anaerobic digestion
12. 12. www.biogas3.eu Which materials can produce biogas? Agricultural waste & Products Animal slurries Harvest residues Grass / Maize / Cereals Food processing waste Meat/fish processing waste Dairy waste Brewery spent grains Vegetable waste Waste from prepared food factories Sludge from waste water treatment plants Waste Management / Sludge Management
13. 13. www.biogas3.eu Potential Substrates & Gas Yield Substrate Dry matter Biogas Methane Content Net Energy Heating value (ex parasitic) Electricity Electric value 90% efficient 35% efficient 19c/kwh [%] m3 /ton fresh weight % kWH / Tonne @8c/kwh [kWh el./ton] Cattle Manure 8 25 60 162 8.92 57 10.80 Pig manure 6 20 60 130 6.59 45 8.64 Milk whey 8 58 53 332 21.16 117 22.14 Brewers yeast (pressed, cooked) 25 152 62 1018 66.43 357 67.87 Potato pulp 19 108 50 583 36.78 205 38.89 Slaughterhouse waste (rumen) 15 60 55 356 21.55 125 23.77 Bread and baking residues 77 570 53 3263 213.82 1145 217.57 Corn silage 35 216 52 1213 77.75 426 80.89
14. 14. www.biogas3.eu What can BIOGAS3 do for me? Training courses & workshops On-line and face-to-face Choice of basic courses, specialised workshops, webinars Personalised feasibility studies With the software smallBIOGAS, to check if your feedstock and site are suitable for a small-scale biogas plant. Networking and one-to-one activities Contact to specialised biogas plant technologists and technology centres that will help you to outline the best project Implementation of new small-scale biogas plants
15. 15. www.biogas3.eu Im interested, how can I take part? Contacts Noel Gavigan noelgavigan@irbea.ie 087-6845977 Michael Hegarty michaelhegarty@irbea.ie 087-0556630 www.irbea.ie
16. 16. www.biogas3.eu Thank you for your attention