AD On Farm The Regulations

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Bioenergy West Midlands
Anaerobic Digestion Event and Site Visit
17th March 2009

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AD On Farm The Regulations

  1. 1. Anaerobic Digestion of Manure and Slurry The Regulations Sharon Chisholm Senior Environment Officer - Agriculture
  2. 2. Recent change in regulatory position •Where the only waste feedstock to AD plant is farm manure/slurry •the digestate is not waste •provided it is applied to land for agricultural benefit •BUT, the biogas will be waste
  3. 3. Regulatory Implications for the AD Plant AD plants using manures/slurries must hold the  appropriate EA authorisation Most farm AD plants will qualify for exemptions from  permitting They will just need to register simple, free  exemptions with the EA If the feedstock includes food waste or other  materials covered by the Animal By-Products Regulations, the plant will be subject to those Regulations. This is not regulated by the EA.
  4. 4. Will you require a permit or exemption?
  5. 5. Regulatory implications for the use of digestate No waste regulatory controls Remember NVZ rules will apply
  6. 6. Regulatory implications for the use of digestate Waste regulatory controls apply
  7. 7. Worked example for a large dairy farm digesting own manure 1 cow - 53 litres excreta, 2.9kg bedding, 18 litres parlour washings per day 500 cow heard – 37m3 per day Using an AD plant with 20 day retention time, total manure being digested at any time will be 740m3
  8. 8. Conclusion: Qualifies for exemption
  9. 9. Worked example for a large dairy farm digesting own manure 1m3 cattle manure produces 20m3 of biogas with calorific value 5.83kWh/m3 AD plant will therefore produce 740m3 biogas per day which produces 180kW (0.18MW) of thermal energy when burned as a fuel.
  10. 10. Conclusion: Qualifies for exemption
  11. 11. Future changes •DEFRA review of exemptions •Quality protocol for the use of digestate in 2009
  12. 12. Thank you for listening! Any Questions? Sharon Chisholm 01743 283539 www.environment-agency.gov.uk 08708 506 506

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