Colchester Waste Water Treatment Works

Major upgrades required to the existing Anglian Water waste water treatment works at Colchester, Essex. Anglian Water needed to increase the capacity of the Sludge Treatment Centre within the WwTW, resulting in an increased production of renewable electricity for the operations of both sites. Following determination by Ofwat, they had an obligation to deliver the following outputs by March 2015: increase total capacity for sludge treatment to enhanced treated standards across the Anglian Water region from 46% to a minimum of 80%, increase total on site renewable electricity generation from biogas to 86.8GWh/year and reduce biosolids treatment by lime stabilisation to less than 1% of the total raw sludge production. Colchester WwTW was recognised as one of five key sites where the upgrades were possible and would deliver the outcomes required. 

Project Overview:

  • End User: Anglian Water
  •  Client: Black & Veatch
  • Project: Mechanical Installation Works, New Advanced Digestion Project, Colchester STW
  • Project Value: £ 30 Million
  • GMK Contract Value: £ 250,000.00

GMK Services Provided:

  • Project Management
  • Health & Safety Management
  • Supply, Fabrication and Installation of Stainless Steel Pipework System ranging from DN25 to DN400
  • Supply and Installation of PVC-u and ABS Plastic Pipework System ranging from DN15 to DN150
  • NDT Testing of Stainless Steel Pipework to 10% Dye-Pen and Carbon Steel Pipe work 10% X-Ray
  • Supply, Fabrication and Installation of Galvanised Mild Steel Pipework Support Structures including
  • Full Testing and Commissioning of Installed Systems
  • Provision of As-built Drawings and Operation and Maintenance Manuals


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GMK are a member of the Britsh Safety Council
GMK are ISO-9001 Certified
GMK are SafeCert Cerified
GMK are on the UK Register of Pre-Qualified Construction Services

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