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Cathal Renewable gas presentation 12.11.10

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  • By 1st January 2013 Ireland can only landfill a maximum 50% of the (Biodegradable Municipal Waste) BMW generated in 1995, i.e. a national maximum of 644,956t BMW can be landfilled.
    By 1st January 2016 Ireland can only landfill a maximum 35% of the BMW generated in 1995, i.e. a national maximum of 451,469t BMW can be landfilled.
    Latest EPA statistics show that:
    Approximately 3.4 million tonnes of municipal waste is generated annually; 
    Of this, 2 million tonnes is landfilled;
    Approximately 1.5 million tonnes of the landfilled municipal waste is biodegradable.
    AD is an ideal process to treat BMW.
  • Significant biogas production in Germany and the UK (3700 Agricultural Anaerobic Digesters which employ 10,000 people in Germany).
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Transcript

  • 1. 1 The Future of Renewable Gas in Ireland
  • 2. 2 Some Context …. • Energy demand in Ireland has increased by 72% from 1991 to 2008 characterised by; • The Renewable Energy targets are quite challenging; – 40% of electricity to come from renewable sources by 2020 – 12% of heat to be derived from renewable sources by 2020 – Renewable resources to account for 10% of all transport fuel by 2020 • Ireland is making progress addressing RES (E); – 11.8% of 2009 electricity consumption from renewable sources • RES (H) and RES (T) progress towards targets have been slow to date; – 3.6% of thermal energy and 1.2% of transport energy from renewable sources in 2008 • Landfill Directive • Renewable gas produced from biomass using Anaerobic Digestion represents a significant and under represented source of renewable energy in Ireland.
  • 3. 3 Biogas is produced when feedstocks, such as organic wastes, and energy crops, are converted into biogas using anaerobic digestion technology
  • 4. 4 Injection into the gas network may look like… Substrat(s) Methanisation Treatment (CO2,H2S, water, traces) Raw biogas • Bio waste • Sewage • Food - processing waste • … Composition: • 50 - 65%CH 4 • 30 - 40%CO 2 • water • H2S • NH3 • traces Upgraded gas Composition similar to natural gas Control (CH 4, CO2, water, H 2S) Di ge sta t Odorisation Regulator for flow / pressure (2nd compressor?) Compression (few bars) Metering Control of gas quality Injection point Valve Natural gasNatural gas + Biogas Vent or storage If quality is not good enough! Out of the limits Safety equipments (shut -off valve, safety valve…) Substrat(s) Methanisation Treatment (CO2,H2S, water, traces) Raw biogas • Bio waste • • Food - processing waste • Energy crops… Composition: • 50 - 65%CH 4 • 30 - 40%CO 2 • water • H2S • NH3 • traces Upgraded gas Composition similar to natural gas Process Control (CH4, CO2, O2, H2S, H2O) Digestat Odorisation/ LPG* Regulator for flow / pressure (2nd compressor?) Compression Metering Control of gas quality Injection point Valve Natural gasNatural gas + Biogas Vent or storage If quality is not good enough! Out of the limits Safety equipments (shut -off valve, safety valve…)
  • 5. 5 Linkoping Sweden
  • 6. 6 Feed stock for Linkoping 7,000t/a of pig slurry 47,000t/a of slaughter waste Blood and process water pumped in
  • 7. 7 Biogas treatment Collection over digester Scrubbing Compression and storage
  • 8. 8 65 buses, 10 waste collection lorries, 600 cars…
  • 9. 9 And a train
  • 10. 10 Biogas from grass as transport fuel in Salzburg harvest silage storage macerator Source: energiewerkstatt, IEA and persona photos anaerobic digester weigh bridge Biogas service station
  • 11. 11 Renewable Gas has a key role to play in a low carbon future for Ireland • Simple efficiency measures across all sectors • Decarbonised electricity fuels zero emission cars • Decarbonise gas using renewable gas
  • 12. 12 Opportunity– Renewable Heating Biomethane for Heating • Utilise the Bord Gáis gas network as a route to market for renewable heating with biomethane (BioNG): – Over 700,000 domestic and 30,000 I/C customers served by the network. – Uses existing meters (incl. Smart Meters when available). – Minimal changes to supplier billing systems. – No disruption to premises required – will allow customers switch to renewable heating with a phone call! – Used in existing appliances….. At very high efficiencies – e.g. 80% for a gas boiler, – as a renewable fuel source for domestic and I/C CHP units). – Increases national fuel diversity and security of supply. – Significant contribution towards the RES-H target possible.
  • 13. 13 Opportunity- Renewable Transport Biomethane for Transport • Utilise the Bord Gáis gas network as a route to market for renewable transport with biomethane (BioCNG): – Over 11 million cars worldwide running on CNG incl. Germany, Italy. – Bi-fuel cars and vans available – can switch from petrol to CNG seamlessly at the push of a button! – Significant contribution towards the RES-T target possible and reductions in national CO2 levels. – Proven vehicle and re-fuelling options available today.
  • 14. 14 Biomethane across Europe
  • 15. 15 Potential for Renewable Gas in Ireland Figures converted from PJ to mscm natural Gas equivalent (@ 36.8 MJ/m³) Practical (mscm pa) Agricultural Slurry 51 OFMSW 15.6 Slaughter Waste 18.6 Surplus Grass 325.7 Total 410 As % of total Irish gas demand 7.5% • Notes: • 1. 3,873,525 tonnes agricultural slurry x 12.8m3 methane (CH4) per tonne x 1/0.97= 51.3Mm3 biomethane per annum (with 97% CH4 content). • 2. 870,000 tonnes OFMSW x 25% recoverable x 69 m3 CH4 per tonne x 1/0.97= 15.6 Mm3 biomethane per annum. • 3. 208,877 tonnes slaughter waste x 86 m3 CH4 per tonne x 1/0.97= 18.6 Mm3 biomethane per annum. • 4. 97,500 hectares x 3,240 m3 CH4 per hectare x 1/0.97 = 325.7 Mm3 biomethane per annum. • 5. Conversion assumes biomethane has an energy content of 36.8 MJ/Mm3.
  • 16. 16 Irish Renewable Targets National Targets • RES-E: 40% electricity from renewable sources by 2020. • RES-H: 12% heating from renewable sources by 2020: – Renewable energy accounted for 3.6% of thermal energy in 2008 – Bio methane could deliver 6.5% to this target • RES-T: 10% renewable fuels for transport by 2020: – Renewable energy accounted for 1.2% of transport energy in 2008 – Bio methane could exceed this target (12%) • Source: SEI EPSSU Energy in Ireland Key Statistics 2009.
  • 17. 17 The Cost of Producing Biomethane Feedstock/scenario €/mn3 OFMSW (50,000 t/a) 0.14 Slaughter Waste (50,000 t/a) 0.73 Grass (137 ha, farm model) 0.97 Grass (137 ha, developer model) 1.10 Co-digest (slurry & grass) 1.23 Slurry (29,700 t/a) 1.83 The Cost of producing Biomethane, Green Gas Technologies Ltd., March 2010
  • 18. 18 Regional potential for grass biomethane • Assessment criteria – Pasture area – Grass yields – Current farming practice – Gas grid coverage – Availability of belly grass Source: Determing the regional potential for a grass biomethane industry, Submitted to Applied Energy, October 2010.
  • 19. 19 Resource mapping Source: EPA Corine Land Cover Data Percentage pasture Grass yields, gas grid & slaughter- houses
  • 20. 20 Potential for grass Grass biogas Grass biomethane Grass + belly grass biomethane
  • 21. 21 Ballyhoura Ballyhoura: • Within an area of high potential • High pasture coverage • Good gas grid coverage • Good availability of belly grass Resource calculation: • 20 km transport distance to gas grid
  • 22. 22 Ballyhoura: enough biomethane to heat 32,000 homes Annual feedstock Biomethane (Mmn3 yr-1) Energy (PJ yr-1) Cars (nr yr-1) Houses (nr yr-1) Grass silage 261,727 ha 910.6 33.37 855,696 644,250 5% grass silage 13,086 ha 45.5 1.67 42,785 32,213 Belly grass 5094 t (20%DS) 0.3 0.01 316 238 Total (5% grass + belly grass) 45.9 1.68 43,101 32,450 Number of private cars in Limerick (city + county): 84,170 Number of meter points in Limerick (city + county): 25,366