Anaerobic Digestion Syllabus [1 June 2016]

(Please note: Environment Agency source documents in support of continuing competence may have been withdrawn from circulation  as a result of  policy change   although the content is  current. We provide the information in good faith for the purposes of the Continuing Competence test but it cannot be considered a substitute for obtaining detailed advice or guidance from the regulatory body in terms of site operational requirements. If a link is broken the resources may be available in the waste resource section or searching the source title using a search engine.)

Title:

ANAEROBIC DIGESTION (AD)

Syllabus areas

Learning Outcomes

The candidate will be able to:

Source

1. Waste Acceptance Procedures
  • Pre-acceptance procedures
  • Waste Reception and storage

 

1.1 Know what information, checks and records required prior to accepting waste

1.2 Know the  acceptance procedures for waste that arrives at the anaerobic digestion  facility

1.3 Know the requirements for waste reception and storage at the anaerobic digestion facility

1.4 Know the procedures for rejection at an anaerobic digestion facility

GOV.UK: How to comply with your environmental permit (v6 June 2013)
How to comply with your environmental permit. Additional guidance for: Anaerobic Digestion  
WRAP – PAS110 (2014) 

 

 

 

2. Feedstocks

 

  • Feedstock source
  • Feedstock characterisation and sampling
  • Contamination

 

2.1 Know  the types of feedstocks available for anaerobic digestion

2.2 Know the characteristics that should be tested as part of a detailed feedstock characterisation

2.3 Know the consequences of using contaminated feedstocks for the anaerobic digestion  process

2.4 Know how the residual wastes from an anaerobic digestion facility should be controlled and managed

GOV.UK: AD Quality Protocol
SR2012No11: Anaerobic Digestion facility including use of the resultant biogas
SR2012No11: Anaerobic Digestion facility including use of resultant biogas (Waste recovery operation – capacity less than 100 tonnes of waste per day)
 

 

3. Accepting Animal By Products

 

  • Animal By Products
  • HACCP plan

 

3.1 Know the requirements for handling materials covered by Animal By Product Regulations

3.2 Know how a Hazard Analysis Critical Control Point plan can benefit a Animal By Products Regulations facility

3.3 Know the potential hazards to be assessed in relation to a Hazard Analysis Critical Control Point plan 

3.4 Know the control measures required for feedstocks containing meat

The Animal By-Products (Enforcement) (England) Regulations 2013
GOV.UK:  Animal by-products categories, site approval and hygiene
GOV.UK: using animal by-products at compost and biogas sites
4. Emission Control and Abatement

 

  • Point source emissions to air
  • Fugitive emissions to air
  • Odour management
  • Bioaerosols
  • emissions to surface water, groundwater and sewer
  • Dust
  • Noise and vibration
  • monitoring

4.1 Know the requirements for managing point source emissions to air

4.2 Know when the majority of fugitive emissions to air are likely to occur

4.3 Know the main methods of preventing point source emissions to air

4.4 Know the factors that determine the degree of odour pollution

4.5 Know the options for odour monitoring

4.6 Know the methods used to prevent odour pollution and minimise its impact

4.7 Know what information should be included in an odour management plan

4.8 Know where there is a risk of bioaerosols release from the anaerobic digestion process and how to mitigate it

4.9 Know the requirements for control of emissions to surface water, groundwater and the sewer

4.10 Know the control measures to supress dust creation and dispersion

4.11 Know control measures to minimise the emission of noise and vibration

4.12 Know what information is required if noise issues become relevant

How to comply with your environmental permit. Additional guidance for: Anaerobic Digestion  
Organics Recycling Group – An industry guide for the prevention and control of odours at biowaste processing facilities  
Environment Agency – How to comply with your Environmental Permit (V6, June 2013)
Environment Agency – H4: Odour Management (March 2011)
Environment Agency – Generic Environment Risk Assessment for AD  SR2010No15 
SR2012No11: Anaerobic Digestion facility including use of the resultant biogas V3.0
SR2012No11: Anaerobic Digestion facility including use of resultant biogas (Waste recovery operation – capacity less than 100 tonnes of waste per day)

 

 

5. Standards

 

  • AD Quality Protocol
  • PAS 110
  • HACCP
  • Records

 

 

5.1 Know the key principles of PAS 110

5.2 Know the treatment requirements for compliance with PAS 110

5.3 Know what is required in order to class an output from the anaerobic digestion process as a non waste material

5.4 Know the limitations and legislative compliance requirements if outputs are not certified as meeting PAS 110 and the Anaerobic Digestion Quality Protocol

5.5 Know what wastes (including bioplastics) are permitted in order to comply with PAS 110 and the AD Quality Protocol

5.6 Know what records need to be kept in order to comply with PAS 110 and the Quality Protocol

5.7 Know the principles of  a Hazard Analysis Critical Control Point plan and when it may apply

5.8 Know the maximum amount of  contaminants permitted under PAS 110

AD Quality Protocol
WRAP – PAS110 (2014)
6. AD Process Principles
  • Pre-treatment
  • pH and nutrients
  • Pasteurisation
  • Management and use of non PAS 110 outputs
  • Biogas
  • Organic Loading Rate
  • Feedstocks
  • Plant and equipment breakdown

 

6.1 Know the principles of anaerobic digestion treatment 

6.2 Know what pre-treatment may be required for different types of feedstock

6.3 Know what key factors need to be monitored during the digestion process

6.4 Know the pH range for feedstock and how to manage it

6.5 Know the consequences of having too much nitrogen within the anaerobic digestion process

6.6 Know the issues surrounding the production, storage, treatment and use of biogas

6.7 Know the requirements for pasteurization

6.8 Know how to identify the organic loading rate of the process

6.9 Know the options for disposal of biogas condensate

6.10Know the requirements for use of an auxiliary flare under a permit

6.11Know the regulatory and process requirements that need to be managed in case of plant and equipment breakdown

6.12Know the recommended nutrient ratios for an anaerobic digestion process for optimum methane production

WRAP – PAS110 (2014)
Environment Agency – How to comply with your environmental permit – Additional guidance for Anaerobic Digestion
SR2012No11: Anaerobic Digestion facility including use of the resultant biogas
SR2012No11: Anaerobic Digestion facility including use of resultant biogas (Waste recovery operation – capacity less than 100 tonnes of waste per day)
HSE – Confined Spaces (published 01/13)

 

 

7. Digestate
  • Storage
  • Sampling and testing
  • Treatments
  • Use

7.1 Know the requirements for the storage of digestate:
–    PAS 110 compliant
–    Non PAS 110 compliant  

7.2 Know the regulatory requirements for the storage of digestate in a lagoon

7.3 Know when digestate sampling and testing may be required

7.4 Know what digestate treatments may be required, their benefits and their uses

7.5 Know the legal requirements for use of digestate not meeting the PAS 110 and the Anaerobic Digestion Quality Protocol

Environment Agency – How to comply with your environmental permit – Additional guidance for Anaerobic Digestion
SR2012No11: Anaerobic Digestion facility including use of the resultant biogas
SR2012No11: Anaerobic Digestion facility including use of resultant biogas (Waste recovery operation – capacity less than 100 tonnes of waste per day)

 

 

8. Health and Safety
  • Fire/ explosion prevention
  • Accidents and abnormal operation
  • DSEAR
  • Confined spaces

 

8.1 Know the hazards and risks associated with carrying out maintenance in a digester

8.2 Know of the control measures to mitigate the risk of fire, explosion and the other harmful physical effects from dangerous substances as required by the Dangerous Substances and Explosive Atmospheres Regulations 2002

8.3 Know what should be included in a formal accident management plan

HSE – DSEAR Guidance (published 2013)
http://www.hse.gov.uk/pubns/books/l138.htm 
HSE – Confined Spaces (published 01/13)

 

Additional Sources of information

(Please note: all information is accurate at the time of publishing. It is the learner's responsibility to refer back to the author's website for latest information.)