Anaerobic Digester Plant

Anaerobic Digester Plant

Mildren Construction undertook the Design & Construction of a new Anaerobic Digester Plant biomethane upgrading plant for Re-Gas energy Group at their Herriard Park Farm near Basingstoke.

AD technology is a sustainable and environmentally-friendly method of producing biomethane which creates low-carbon heat, transport fuel and electricity. The new plant generates biomethane from local food waste collections which it injects into the national gas grid for use by households and businesses reducing the need for fossil fuels. The site also produces electricity which is, again, injected into the national electricity grid.

The project involved construction of the following key elements:

  • Large Steel Frame Waste Handling unit
  • Bio-Digester Tanks
  • Silage Clamps & Lagoons
  • Site Offices
  • Supporting infrastructure including Roads and Drainage

The site required a significant amount of groundworks to be undertaken to ensure the land was suitable for the new buildings. The Digester Tanks were originally intended to be constructed on a piled solution, however, following the results of a Site Investigation Report, this design was deemed to be unsuitable due to the soft ground.

The solution put forward by the Mildren Construction design team was to use a process of soil stabilisation. This process involved mixing the existing material with a concrete mix and then re-laying this in-situ and rolling to leave a flat compacted base. The mix hardened to create the concrete base required, onto which the Digester Tanks could then be built.

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Development time

22 weeks

Project size

8,000 sq/ft

Works included

Ground stabilisation works

herriard point 14 5 22 6

Anaerobic Digester Plant

Herriard Park, A339, Herriard, Basingstoke, UK