Halcrow helped Yorkshire Water upgrade and improve one of its largest wastewater treatment works, serving 1.2 million customers, in line with the European freshwater fish directive. The works were refurbished, the process stream converted and a new secondary process stream built. The works remained operational throughout.
Project challenges and goals
- to improve the working performance of the works, in line with the European freshwater fish directive
- to refurbish and improve the existing assets
- to design and build a robust treatment works
- to upgrade the works to schedule and budget
- to provide innovative best-value solutions
- to carry out work without disruption to the existing treatment works and any risk to the environment
- to set a benchmark for major project delivery
Outcomes and achievements
- The upgraded Knostrop works has become Yorkshire Water’s flagship treatment facility
- the community and environment have benefited through improved water quality
- the reliability and operability of the works is improved
- the size of the treatment works was condensed, releasing client-owned land for further development
Halcrow’s role
Halcrow was the principal designer in the Laing O’Rourke-Halcrow design-and-build team. We carried out 90 per cent of the detailed design.
The services Halcrow provided include:
- detailed design on the project, which included: process design, civil design, mechanical, electrical and design for Instrumentation, control and automation
- leading the complex commissioning for the new works, which involved switching from the old processing stream to the new and refurbished ones without any non-compliant discharges into the receiving water courses or other environmental issues
- Halcrow contributed to the success of the project through:
- extensive experience in wastewater treatment design
- innovation in civil and structural engineering
- managing and understanding the complex commissioning issues involved