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ADBA Temperatures & Biology Training 11 May 2022

May 11 @ 9:30 am - 1:00 pm

£99.00 – £149.00


This training is about the effect of increasing temperatures on biological health and gas production. In the UK, AD plants are typically built with lots of insulation to keep substrate warm even in cold winter temperatures but this can contribute to increasing tank temperatures and biological risks in the hotter summer months. Operators will gain a better understanding of how temperatures can start to rise, what this means for biological health and gas production and what control measures should be considered to mitigate the risk of serious biological failures. The training is delivered by Angela Cronjé, a chemical engineer with 15 years experience in organic waste processing on operational plants.



  • Welcome and introductions
  • Heatwaves and AD
    • How does a digester over-heat?
    • Case studies
    • Importance of data collection and interpretation
  • Rising temperatures and biology
    • What are the ‘normal’ operating temps and why?
    • The effect of increasing temperatures on digester biology
    • The effect on gas production and composition
    • Case studies
  • Digester temperature and ammonia
    • The risks of a high ammonia diet
    • Ammonia chemistry and inhibition
    • The effect of increased temperature on digester ammonia
    • Case Studies
  • Control measures
    • Plant design
    • Tank cooling circuits and external chilling options
    • Diet planning
    • Failed biology recovery
  • Q+A/ open discussion


ADBA is the UK Anaerobic Digestion and Bioresources Association.

THIS EVENT IS DELIVERED ONLINE. The agenda will include regular, short comfort breaks.

To pay by invoice or over the phone, please contact Angela Knight, Finance Assistant at ADBA at and +44 (0) 20 3960 0782

For other questions, contact Cheryl Murdoch, Senior Event Manager at ADBA, at


May 11
9:30 am - 1:00 pm
£99.00 – £149.00


United Kingdom




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