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08 Jun 17

Alpheus secures contract to deliver the wastewater treatment needs for the new town of Ebbsfleet

Alpheus has been selected as the preferred contractor to design and construct the new wastewater treatment facility for Castle Hill, Kent – the first phase of the Government’s new garden city to be built at Ebbsfleet Valley. The new town of Ebbsfleet is currently one of the largest developments in the south of England, with plans to build 15,000 new homes for a planned population of 40,000.


Multi-utility provider, Metropolitan, was awarded the contract to deliver services for the 1,500-home Castle Hill development by Land Securities. The agreement includes installation of a new onsite wastewater treatment works for 4,000 population equivalent (PE).

Metropolitan has appointed Alpheus to deliver a turnkey package including all civil, mechanical, electrical, and process works associated with the wastewater treatment works. Alpheus are working with one of their preferred process provides, WPL Ltd. to deliver a flexible innovative system to serve the homes, businesses and amenities currently under construction with the ability to be extended as the need arises. 

The works will include a combination of some of the most innovative and advanced technologies available on the market to provide the least cost and most efficient delivery of the waste water treatment works to the residents of the newly formed town of Ebbsfleet. It will be built in two stages and will comprise of 16 above ground Hybrid Submerged Aerated Filter (SAF) package treatment units, primary lamella clarifier units, final settlement tanks, blowers and the airlines.

The first stage of the new treatment works will serve 2,000 PE and will comprise one primary lamella clarifier, eight Hybrid SAF units connected in series and the final settlement tank. The second stage, on which work is expected to begin next year, will expand the plant to serve 4,000 PE.

The area has protected groundwater therefore the Environment Agency have stipulated that the new treatment plant has to be installed above ground level.  The plant will release wastewater treated to the highest standard required by the Environment Agency into the Thames Estuary.


Declan Maguire, Operations Director for Alpheus. “We are delighted to have this opportunity to provide a facility that will benefit all of the new residents and businesses in Ebbsfleet Valley. Our engineers have worked tirelessly to provide an innovative combination of technologies that will provide the most efficient and effective solution to the water treatment needs of this, one of newest towns in the UK. I have no doubt this effort will continue to deliver value for the residents of Ebbsfleet long into the future”.   

At present, effluent from the homes and commercial properties in the Castle Hill development is collected in a storage tank and transported away by tanker. However the town, which is 17 minutes away from central London by high-speed rail and situated on the High Speed 1 service to continental Europe, is set for rapid expansion.

In the March 2014 Budget, the then Chancellor promised 15,000 new homes in Ebbsfleet. New retail, business, leisure and commercial facilities along with schools and healthcare provision are expected to create up to 20,000 jobs.