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C A Blackwell (Contracts)
Limited Head Office

Coggeshall Road, Earls Colne,
Essex, CO6 2JX

Telephone: 01787 223 131

Northern Regional Office
7 Appleton Court, Calder Park,
Wakefield, WF2 7AR

Telephone: 01924 250 132

Midlands and South West Regional Office
4 Bredon Court, Brockeridge Park,
Twyning, Gloucestershire
GL20 6FF

Telephone: 0844 482 9685

Scottish Regional Office
Broken Cross,
Douglas Water,
ML11 9PB

South Wales Regional Office
St Line House,
Mount Stuart Square,
Cardiff Bay, CF10 5LR

Telephone: 0844 482 9685


Hanningfield Reed Bed case study

The construction of the innovative reed beds at Hanningfield Water Treatment Works was awarded to Blackwell by Essex and Suffolk Water Limited, who are owned by Northumbrian Water Limited.

The new reed-beds system will enable the sludge, which has been produced from water treatment, to be dewatered for disposal with a significantly reduced carbon footprint, whilst also providing a new habitat for wildlife. 


The main elements of the scheme include: 

  • Diversion of an existing sludge main
  • Creation of 16 individual reed-beds with each reed-bed having a surface area of 2,720 m2 and a nominal depth of 2.4m
  • Installation of butt-fused polyethylene pipe work
  • Installation of U- pvc pipe work
  • Installation of pit and duct system
  • Construction of site building for monitoring and telemetry equipment and operator welfare
  • Installation of Mechanical, Electrical, Instrumentation, Controls and Automation Systems
  • Construction of vehicular access

hanningfield.jpg  pipejoining.jpg  reedbedconstruction.jpg

Download print friendly PDF of this case study click here