Thames Water has awarded a major AMP8/9 contract for the supply, commissioning and maintenance support of Combined Heat and Power (CHP) engines across multiple Thames Water wastewater treatment sites to maximise engine availability / performance.
Thames Water currently operates 47 Combined Heat and Power Engines (CHP) across 24 wastewater treatment sites. The engines vary in age, size and output and many are approaching the end of their lifecycle (typically 20 years).
The contract will cover the replacement of end-of-life engines during AMP 8 with estimated 10 - 16 new engines (Estimated range between 100kW - 1500kW electrical output) expected to be installed within AMP 8 alone. Further new engines will be required for AMP 9 when the upgrade of engines at an additional 7 wastewater treatment sites are planned
Scope of the contract includes the provision of new CHP units and associated services to support operational efficiency and energy recovery, as well as spare parts stock holding and technical support.
Objectives and expected outcomes include:
- Effective utilisation of the biogas produced during the treatment of sludge, minimising flaring of gas, maximising electrical heat and power production
Securing Capacity: Ensure supply of CHP Engine requirement through AMP 8 and AMP9 - Standardisation: Promote consistency across the CHP estate to reduce complexity and improve asset availability
- Commercial Value: Leverage volume-based incentives and long-term value through strategic sourcing
- Serviceability: Ensure availability of cost-effective spare parts and technical support
- Efficiency & Sustainability: Support energy recovery and carbon reduction goals by securing high-performance, low-emission CHP solutions
- Regulatory Changes: Ensure compliance with evolving regulatory requirement
- Innovation: Accommodate benefits from innovation
No information has been made available with regard to the potential estimated total value of the contract. However, In AMP7 Thames awarded a contract with an estimated value of £19.92 million for the repair, maintenance and supply of parts and spares directly or on its behalf by its contractors for CHP engines across all manufacturers used on Waste Treatment sites, inc. Caterpillar, Cummins, Jenbache, MAN & MWM. Successful suppliers were N-ERGY Ltd, CooperOstlund Ltd, Clarke Energy Ltd, Edina UK Ltd, ABB Ltd. and Colchester Fuel Injection Ltd.
Edina UK Ltd has been awarded a contract - when the contract was tendered Thames Water said it anticipated awarding the contract to a single supplier. The aim was to award a single-source agreement to enable standardisation, improve serviceability, and reduce complexity across the estate. However, the company also reserved the right to award to more than one supplier if it was deemed to deliver best value.
Earliest date the contract will be signed is 1 September 2026. Current estimated start and end contract dates are 1 September 2026 to 1 September 2029 with further possible extension options to 1 September 2034.
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