Aerobic Composting 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(Please note: Environment Agency source documents in support of continuing competence may have been withdrawn from circulation  as a result of  policy change   although the content is  current.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:

AEROBIC COMPOSTING (AC)

Syllabus areas

Learning Outcomes

The candidate will be able to:

Source

1. Waste Acceptance Procedures

 

  • Pre-acceptance procedures
  • Waste reception and storage

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

1.2 Know the acceptance procedures for waste that arrives at the aerobic composting facility

1.3 Know the requirements for waste reception and storage at the aerobic composting facility

1.4 Know the procedures for waste rejection at an aerobic composting facility

How to comply with your environmental permit: Additional technical guidance for: composting and aerobic treatment sector
SR2012No3 (v2) Composting in closed systems
SR2012No7 (v2) Composting in open systems
SR2012No4 (v3) Composting in closed system (Part A Installation)
SR2012No8 (v3) Composting in open systems (Part A Installation)
2. Feedstocks
  • Feedstock source
  • Feedstock characterisation and sampling
  • Mechanical Biological Treatment (MBT)

 

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

2.2 Know why non-source segregated feedstocks potentially pose a greater environmental risk when using the resulting compost-like output

2.3 Know the consequences  of using contaminated feedstocks for the aerobic composting process

2.4 Know the consequences  of using contaminated feedstocks for the Mechanical Biological Treatment process

2.5  Know how the residual wastes from an aerobic composting facility should be controlled and managed

Environment Agency – Sustainable management of biowastes: Compost-Like Output from Mechanical Biological Treatment of mixed source municipal wastes
DEFRA.GOV.UK Mechanical Biological Treatment of MSW.
Organics Recycling Group – An industry guide for the prevention and control of odours at biowaste processing facilities
SR2012No3 (v2) Composting in closed systems
SR2012No7 (v2) Composting in open systems
SR2012No4 (v3) Composting in closed system (Part A Installation)
SR2012No8 (v3) Composting in open systems (Part A Installation)

 

3. Accepting Animal By-Products
  • Animal By-Products Regulations
  • Food waste
  • HACCP plan

3.1 Know the types of aerobic composting facility that can handle catering waste according to Animal By-Product Regulations

3.2 Know the requirements for record keeping regarding Animal By-Products or food waste delivered to the site

3.3 Know what a Hazard Analysis Critical Control Point plan is in relation to gaining Animal By-Products Regulations approval and what steps are required

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. Odour control

 

  • Monitoring
  • mitigation
  • Feedstock control
  • Biofilters or other equivalent abatement systems

4.1 Know what circumstances odours may be produced during aerobic biological treatment processes

4.2 Know the odour problems associated with aerobic biological treatment processes and how to control them

4.3 Know the methods used to monitor odour on an aerobic composting facility

4.4 Know alternative methods to biofilters for odour control

4.5 Know the limitations of using sniff testing for monitoring odours

4.6 Know the information required in an odour management plan

4.7 Know the optimal operating conditions for Biofilters

4.8 Know how to identify the correct biofilter size for aerobic biological treatment processes

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)
How to comply with your environmental permit: Additional technical guidance for: composting and aerobic treatment sector
SR2012No3 (v2) Composting in closed systems
SR2012No7 (v2) Composting in open systems
SR2012No4 (v3) Composting in closed system (Part A Installation)
SR2012No8 (v3) Composting in open systems (Part A Installation)
5. Bioaerosols management
  • Monitoring and control methods
  • No-effect zones
  • Biological risk assessments

 

5.1 Know the factors affecting a bioaerosol risk assessment for sensitive receptors

5.2 Know the methods used for bioaerosol abatement (including reducing point source releases)

5.3 Know where a safe/no-effect zone can be established with regard to bioaerosol exposure

5.4 Know the consequences of exposure to bioaerosols to staff and visitors and

5.5 Know how to manage the risk of exposure to bioaerosols

Environment Agency – Composting and potential health effects from bioaerosols: our interim guidance for permit applicants  
[http://webarchive.nationalarchives.gov.uk/20140328084622/http://www.environment-agency.gov.uk/static/documents/Research/Composting__bioaerosols.pdf]
How to comply with your environmental permit: Additional technical guidance for: composting and aerobic treatment sector
SR2012No3 (v2) Composting in closed systems
SR2012No7 (v2) Composting in open systems
SR2012No4 (v3) Composting in closed system (Part A Installation)
SR2012No8 (v3) Composting in open systems (Part A Installation)
Environment Agency – Composting and potential health effects from bioaerosols: our interim guidance for permit applicantshttp://webarchive.nationalarchives.gov.uk/20140328084622/http://www.environment-agency.gov.uk/static/documents/Research/Composting__bioaerosols.pdf
6. Standards
  • Quality Protocol
  • PAS 100
  • HACCP plan
  • Sanitisation
  • Stabilisation
  • Compost-like-output (CLO)
  • Storage requirements

 

 

6.1 Know what is required to prevent a ‘product’ being referred to as waste

6.2 Know the characteristics of:
- a sanitisation regime
- a stabilisation regime

6.3 Know how a Hazard Analysis Critical Control Point plan can benefit a PAS 100 certified facility

6.4 Know the maximum amount of  contaminants permitted under PAS 100

6.5 Know the records required in order to comply with PAS 100 and the Quality Protocol

6.6 Know under what conditions a compost like output can be applied to land from a non PAS 100 certified facility

6.7  Know the storage requirements on land for both compost and compost like outputs

6.8 Know the requirements and methods for source separation of feedstocks to meet PAS 100

Compost Quality Protocol
PAS 100: 2011 – Specification for Composted Materials (Please note you will need to request this document from WRAP, but it is free of charge)
SR2012No3 (v2) Composting in closed systems
SR2012No7 (v2) Composting in open systems
SR2012No4 (v3) Composting in closed system (Part A Installation)
SR2012No8 (v3) Composting in open systems (Part A Installation)

 

7. Process Principles

 

  • Process monitoring
  • pH and nutrients
  • Moisture content
  • Temperature
  • Feedstocks
  • Plant and equipment breakdown
  • Leachate

7.1 Know each phase of the aerobic composting process and how to manage it

7.2 Know the monitoring and control requirements for the aerobic composting process

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

7.4 Know the  nutrient ratios for feedstocks and why they are important for effective treatment

7.5 Know the required moisture content for each phase of the aerobic composting process and how to manage it

7.6 Know the temperature requirements for each phase of the aerobic composting process and how to manage it

7.7 Know how to use feedstocks in relation to:
–    Optimum size of input materials
–    Preventing anaerobic conditions  
–    Moisture levels

7.8 Know how to manage the aerobic composting process in accordance with regulatory and process requirements in the event of:
–    Plant breakdown
–    Equipment breakdown

7.9 Know what is good practice for using collected leachate within the aerobic composting process

Organics Recycling Group – An industry guide for the prevention and control of odours at biowaste processing facilities
How to comply with your environmental permit: Additional technical guidance for: composting and aerobic treatment sector  
SR2012No3 (v2) Composting in closed systems
SR2012No7 (v2) Composting in open systems
SR2012No4 (v3) Composting in closed system (Part A Installation)
SR2012No8 (v3) Composting in open systems (Part A Installation)
GOV.UK Fire Prevention Plans
8. Other issues

 

  • Fire prevention
  • Vermin
  • Litter
  • Noise
  • Dust
  • Leachate management
  • Protection of surface water, sewer and groundwater

 

8.1 Know methods of preventing and managing fires on an aerobic composting facility

8.2 Know the requirements for pest and vermin control

8.3 Know the requirements for litter prevention and control

8.4 Know the methods for minimising noise emissions

8.5 Know the requirements for dust prevention and control

8.6 Know the requirements for control of leachate

8.7 Know the requirements for the protection of surface water, sewer and groundwater from substances not controlled by emission limits

How to comply with your environmental permit: Additional technical guidance for: composting and aerobic treatment sector
SR2012No3 (v2) Composting in closed systems
SR2012No7 (v2) Composting in open systems
SR2012No4 (v3) Composting in closed system (Part A Installation)
SR2012No8 (v3) Composting in open systems (Part A Installation)
GOV.UK: Fire Prevention Plans
WISH Guidance – Reducing fire risk at waste management sites
9. Health and Safety
  • Accidents management plan

9.1 Know what information should be included in a formal accident management plan

How to comply with your environmental permit: Additional technical guidance for: composting and aerobic treatment sector

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.)