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Charlotte Evans

Technical Senior Manager

AHDB Pork KE

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Email Charlotte

M: cell 07813 430 605

Pig carcase bioreduction using Anaerobic Digestion (AD) Stage 2

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Research partner: Harper Adams University College

Sponsor: AHDB Pork and Defra

Duration: 2013 – 2015

 

Aims and objectives

  • To develop anaerobic digestion (AD) to optimise biogas production, bioreduction and pathogen destruction
  • To produce a report for the European Food Standards Authority (EFSA) to find out whether AD can be accepted as a safe means of disposal of fallen pigs under EU legislation
  • To determine the optimum conditions for AD of porcine carcase material (PCM) 

Findings to date

  • Significant levels of biogas can be produced from AD of PCM
  • AD of PCM was more efficient and stable at 35ºC than 55ºC
  • Pathogen destruction was greater at 55ºC than 35ºC and reduction of spore forming bacteria such as C. perfringens was minimal at 35ºC
  • Small scale on-farm systems may be a cost-effective alternative to incineration or collection 
  • Some form of pretreatment by sterilisation is required to ensure adequate levels of pathogen destruction, and pig slurry can be effectively utilised as a co-substrate

Further information