Guidance

Seeding of anaerobic digestion plants

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This Regulatory Position Statement (RPS) was originally developed to cover the use of biologically-active waste sludges and digestates as seeding materials in new crop-fed (i.e non-waste) anaerobic digestion (AD) plants.

Non-waste AD plants are themselves a source of biologically-active seeding materials, and with the significant increase in the number of such plants in England, new operators no longer need to rely on using waste-based seeding materials and so the RPS has become redundant.

If you comply with the requirements in this regulatory position statement (RPS) you won't need an environmental permit to use digestate, slurries and sewage sludge as a source of bacteria to activate the anaerobic digestion process.