Crossness currently serves two million Londoners. On completion of the upgrade next year, the site?s treatment capacity will be boosted by 44 per cent.
This will significantly reduce the amount of storm sewage that overflows into the tidal River Thames after heavy rainfall. The project will include the installation of renewable energy sources on site, which will include a wind turbine and thermal hydrolysis plant (THP).
The THP is currently under construction. This industrial-scale ‘pressure cooker’ will heat sludge, the leftover solids from wastewater treatment, to around 160 ?C, in order to produce up to 50 per cent more biogas, which is then burnt to create heat to generate renewable energy.
By the end of this year, the wind turbine will be installed and in the right weather conditions the 78.5 metre-high turbine will provide enough energy to power 1,300 homes.
Kilkern is proud to have played a key role in delivering this project by Supplying Laing and Rourke and Imtech with Site Management, Groundworkers, Deep Drainage pipelayers and also Electrical Engineers. At peak Kilkern has up to 30 workers on this project.