Thames Water Chertsey, England



The Cambi THP plant at Chertsey, just west of London, England was built in 1988 and is owned by Thames Water. It was designed to treat 8,000 tons of dry solids annually, which is produced at Chertsey, Leatherhead, Esher, and other wastewater treatment plants.

Cambi designed and built the THP facility in 1996, which nearly tripled the digester capacity. Cambi subsequently designed, built, and financed an upgrade of the facility and in 2004, Cambi signed an operations contract with Thames Water to operate the THP plant for seven years with an option to extend for an additional three-year period. Thames Water took over operations in 2016

The plant has been operating successfully since September 2015



Address: Clearwater Court-4th East, Reading, Berks RG1*DB

Role: Cambi was responsible for the design, construction of the original project and design, construction, and financing of the upgrade while also taking over operations

Project Size: 14,000 DT/Yr

Feedstock: Biosolids

Products: Class A solid and Electricity

Type of Arrangement: DBFO

Capital Costs: $3M upgrade

Type of Financing: Initial project financed by Thames Water; upgrade financed by Cambi

Project Status: Project started in 1996; operations contract 2004-2016

ECOPRO, Verbal, Norway



On 20 June 2006, the Ecopro AS Board signed the main contract with Cambi AS for the delivery of a complete “Turn-Key” bio-waste sterilization and biogas plant in Verdal, Norway. The biogas plant was designed, built, and operated by Cambi for 2 years and then transferred to Ecopro for operation. The plant uses Cambi’s patented Thermal Hydrolysis Process and other innovative processes to secure safe and efficient treatment. The plant treats both solid and liquid waste totaling 30,000 tonnes/year. The feedstock currently being treated includes source-separated household waste (food waste), organic industrial waste (food processing industries), sewage sludge, fish waste, and animal by-products category II and III (slaughterhouse waste). The produced biogas generated, and landfill gas is converted into electricity through gas engines. The produced pathogen-free bio-fertilizer is nutritious and a well-suited product for the agricultural sector. The process is designed to be in operation 365 days per year. This plant is among the most advanced plants in the world in treating sewage sludge and bio-waste and was based on experience from Cambi’s sewage sludge projects and on its bio-waste plant, “Mjøsanlegget”, in Lillehammer, Norway.


Address: Ravlovegen 324, Skjordalen,7650 Verdal

Role: Cambi was responsible for design, construction and transfer after 3 years of operating the facility

Project Size: 30,000 WT

Feedstock: Imported Biosolids, FOG and Food-waste

Products: 31% AG Soil, 1.56MWe

Type of Arrangement: DBOT

Capital Costs: $20.2 Mil 

Type of Financing: Financed by Ecopro

Project Status: Operation started in 2008 and were transferred 2011