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Crawley Sewage Treatment Works Advanced Digestion

Adding THP into an already snug facility for a flawless fit of the first Cambi B6 in the UK and one of the first in the world.

  • 35


  • $19M

    Construction Value

  • Crawley, United Kingdom

    Crawley, United Kingdom

Setting the gold standard for THP delivery

A regional sludge center, the Crawley Sewage Treatment Works facility called upon our team to lead the design of a new advanced digestion treatment stream. The project—owned and managed by Thames Water—focused on upgrading, refurbishing, replacing, and modifying the existing facility.

Installing new thermal hydrolysis processing (THP) into an existing digestion facility presents numerous design, system integration, and construction challenges. Early in the design stage, our team switched from a Cambi B6-2 to a B6-3 unit to smooth out the steam profile. This allowed for more heat recovery from existing combined heat and power (CHP) units and a higher throughput of 40 dry tonnes per day (dtpd)—now treating 12,600 tonnes of dry solids per year.

This project was one of the first to truly embrace the design for manufacture and assembly (DfMA) fabrication mentality in the United Kingdom, revolutionising delivery of THP plants. Successful DfMA required significant input from our team in helping the supply chain design several containerised packages—minimising onsite construction and commissioning time. Following this example, it’s now possible to deliver THP plants for a lower capex, in shorter time spans, with higher quality. 

At a Glance

  • Thames Water
  • Galliford Try
  • Mott McDonald
Meet Our Team

Jonathan Maclaren, Technical Specialist, Energy

My goal is to deliver sustainable solutions that will help provide a better world and society for all.
Jonathan Maclaren Technical Specialist, Energy Read More

John Ord, Business Director, Energy & Resources

The UK energy business is changing rapidly. We assist our clients across the industry to shape and improve transitional and future energy projects.
John Ord Business Director, Energy & Resources Read More

Jonathan Maclaren

Technical Specialist, Energy

John Ord

Business Director, Energy & Resources

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