Statutory guidance

SR2021 No 10: anaerobic digestion of non-hazardous sludge at a waste water treatment works, including the use of the resultant biogas

For a Part A installation with a biological treatment capacity exceeding 100 tonnes each day, accepting no more than 500,000 tonnes a year.

• From: Environment Agency
• Published: 20 December 2021
• Last updated: 26 February 2026 — See all updates

Applies to England

Documents

SR2021 No 10: anaerobic digestion of non-hazardous sludge at a waste water treatment works, including the use of the resultant biogas

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SR2021 No 10: generic risk assessment for anaerobic digestion of non-hazardous sludge at a waste water treatment works, including the use of the resultant biogas

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Appendix A: MCP plant list

ODT, 8.1 KB

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You can apply for this standard rules permit if:

• your activity meets the rules set out in the permit

• you can manage the potential risks as set out in the generic risk assessment

You can get advice before you apply for a permit.

How to apply for an environmental permit.

Published 20 December 2021

Last updated 26 February 2026 + show all updates

1. 26 February 2026

   Standard rules: 'Activity 4 – treating biogas and biomethane' changed (b) and added (d) and (e). Added technique 21 and 22, 2.5 decarbonisation readiness, 4.2.5 and 'table 4.2' captured, treated and stored carbon dioxide. 'Interpretation' added last sentence to 'accident management plan' and meaning for 'CCR', 'CCR conditions', 'change in type of technical assessment', 'decarbonisation readiness', 'HCR' and 'HCR conditions'. Generic risk assessment: added 3.4 Accidental release of CO2.

2. 17 May 2022

   Added 'or habitats' to the conservation screening distance in the Introductory note and under section 2.2 The site.

3. 20 December 2021

   First published.