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Large scale Combustion of Animal Manure in the United Kingdom

Large scale Combustion of Animal Manure in the United Kingdom. Philip Metcalfe ADAS UK Ltd. Summary. Recovery of value from combustion of poultry litter has many environmental benefits. Uses proven technologies Half the broiler litter in the UK is recovered

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Large scale Combustion of Animal Manure in the United Kingdom

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  1. Large scale Combustion of Animal Manure in the United Kingdom Philip Metcalfe ADAS UK Ltd

  2. Summary • Recovery of value from combustion of poultry litter has many environmental benefits. • Uses proven technologies • Half the broiler litter in the UK is recovered • The construction and operation of large scale power stations has proven to be financially viable over 13 years. • The ash provides revenue and is registered as a product.

  3. Number of table fowl in the UK and volumes of litter

  4. Thetford Eye

  5. Broiler Litter Fuelled Power Stations in the UK

  6. Physical and Chemical Properties of Broiler Litter

  7. Fibrophos

  8. Regulatory drivers for farms • Nitrates Directive 91/676/EC • Directive on Integrated Pollution Prevention and Control 96/61/EC • Town and county Planning Regulations 1988 EIA • Environmental Protection Act 1990

  9. Regulation of the process • Environmental Protection Act Prescribed Processes and Substances Regulation Part A processes. • IPPC • Directive 2000/76/EC on the Incineration of Waste (WID) co-incineration processes

  10. Emissions

  11. Financial Benefits • Revenues from sale of electricity • Renewable obligation certificates • Carbon trading • Lower cost recycling • Revenues from the sale of fertiliser (ash) • Income from litter supply to power stations • Green credentials for users of the products. • 40 employed on-site, 100 – 150 indirect jobs

  12. Carbon and Nutrient Recycling

  13. Environmental Benefits 1 • Significant volumetric reduction • Elimination of nitrogen for NVZ compliance • Preservation of other nutrients • Elimination of odour from recycling • Reduction of ammonia emissions from land spreading • NO2 losses reduced • Reduction of methane emissions

  14. Environmental Benefits 2 • Replacement of fossil fuels • Process remote from high population areas • Avoided carbon emissions • Replacement of chemical fertiliser

  15. Farm Management Benefits • Significant volumetric reduction • Year round removal of waste form poultry units. • Reduced storage requirements • Easier planning permissions • Compliance with IPPC directive • Eliminate pollution risk

  16. The Process

  17. Combustion technologies • Aalborg Boiler watertube 3 pass 65 bar • Stepped grate 1993 • Spread grate 1994 • Fluidised bed 2001

  18. Conversion technologies • Reciprocating Engine 160kva 1990 • Steam Turbine 13Mw 1993

  19. Combustion

  20. Combustion 2

  21. Stepped grate precombustor

  22. Precombustor

  23. Thetford 38 Mwe

  24. Westfield power station 10MWe

  25. Fluidised bed

  26. Summary • Recovery of value from combustion of poultry litter has many environmental benefits. • Uses proven technologies • Half the broiler litter in the UK is recovered • The construction and operation of large scale power stations has proven to be financially viable over 13 years. • The ash provides revenue and is registered as a product.

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