Chichester Sewage Treatment Works
In March 2008 Day Contracting commenced a 3 month contract for the demolition of 9 percolating filters for Southern Water. All were located at Chichester Sewage Treatment Works and included amongst them the largest filter bed in Europe.
As part of a £25 million upgrade scheme to improve the discharge quality from the Chichester works the filters, constructed in the 1940's, were replaced with a new type of treatment process and needed to be decommissioned and demolished.
With 15,000 tonnes of filter media in the filter beds this task represented a large financial disposal cost and environmental hazard to Southern Water. Day Contracting put together proposals for the washing and screening of the excavated filter media. The process effectively "de-classified" the media making it safe to handle and then screen to make suitable for use as a secondary aggregate in the production of ready mix concrete.
Brize Sewage Works
Our contract at Brize Sewage Works was a 1200 cubic metre refurbishment carried out for Thames Water in 2004.
Installation of precast concrete tiles were used to aid suspension of flow through the filter media. This was part of 6000 cubic metre refurbishment contract carried in 2004 requiring the filter media to be reprocessed and re-used within the filter bed - providing both a cost efficient and environmentally effective solution.
TWA Colegate
A solid concrete floor being laid during the 2010 TWA Colegate contract which also involved the update of the feed and outlet pipes and installation of a new Humas tank.
The filter media used was air cooled blast furnace slag - a secondary aggregate produced as a by-product of the smelting industry.
Water contracting enquiries:
- Northern Enquiries - Tel: 0151 428 7000, Facsimile: 0151 428 7172
- Southern Enquiries - Tel: 020 8380 9600, Facsimile: 020 8380 9700
- Alternatively, contact us by email
