The C2V team, working on behalf of United Utilities, has now completed all drainage, pipework and groundworks on site at Macclesfield Wastewater Treatment Works (WwTW). They are currently working on completing the finishing works to the roadways and pavements, this will reduce the amount of mud and dirt which is being tracked onto site.
The new inlet works are fully operational following testing in November and the new tertiary tanks were brought online in December 2024, which has enabled final Site Acceptance Testing to be completed. The tertiary tanks are the final stage of the upgraded treatment process, providing the final ‘polish’ to the effluent before it is discharged to the river.
The team is also in the final testing and commissioning phase for the new Mobile Organic Biofilm (MOB) process. MOB is a biological approach, which uses renewable plant-based media as a carrier to support the growth of the bacteria that is used to treat wastewater and will significantly reduce the amount of ammonia and phosphorus being discharged into the River Bollin upon completion of the works. The MOB process has fully replaced the need for the existing traditional trickling filters on site.
As a part of the Macclesfield WwTW design, the team has also refurbished four redundant Final Settlement Tanks which had been out of service for 30 years. Instead of constructing new tanks, at a great expense to the client, the team sustainably used what they already had within the works and brought the existing assets back online. These tanks will be used as the stage of process between the MOB and the tertiary area.
The six new regulatory outputs were achieved at Macclesfield ahead of programme, with all outputs claimed by 18 December 2024. This is a fantastic achievement by all involved in the project and was a huge contributing factor to C2V achieving all regulatory outputs on the AMP7 framework by the end of 2024.
We look forward to sharing future updates on this work and the wider projects we’re undertaking with United Utilities right across the North West which will be part of the largest upgrade of the infrastructure for a century.
