Category Archives: KEE NuDisc Technology

KEE collaborate with Northern Ireland Water on a £5m investment to construct one of the largest RBC sites in Europe.

KEE’s expertise in design, manufacture, installation, servicing maintenance and operation of equipment for all types of wastewater treatment plants is backed by over 60 years of experience and over 350,000 installations worldwide.


KEE have been working with Northern Ireland Water (NIW) for over 15 years, providing treatment plants for many of their water infrastructure projects. The most recent collaboration involved KEE Group working on a new £5 million wastewater system for 5,800 people at Keady, Co Armagh. The new Keady Wastewater Treatment Works was to deliver improvements in process efficiency, discharge quality and increase the capacity of the plant to encompass the neighbouring population in Armagh.

KEE technical experts worked closely with NIW consultants throughout the term of the project, providing the following:

  • Support and guidance in selecting the correct treatment process and technology
  • Detailed 3D plant designs and specifications
  • Manufacture and supply of wastewater treatment equipment
  • On-site training for NIW Services Staff, to ensure optimum plant process performance and extended life
  • On-going site maintenance and back up support

The Challenge

The new plant was to meet the following requirements:

  • To be constructed within the existing site of the old plant
  • Achieve current and future NI Environment Agency discharge standards and EU regulations.
  • Provide additional capacity to meet the future needs of the growing local population

10 KEE RBCs at the new Keady Wastewater Treatment Works

The Solution

The consistent performance of KEE’s RBC technology installed in Derrylin back in 2010 gave Northern Ireland Water the confidence to proceed with the Keady project.

The new plant was installed in the Autumn of 2012 and consisted of a Tertiary Slow Gravity Sand filter and 10 RBCs (Rotating Biological Contactors).

Each RBC was housed in a precast concrete chamber with GRP top covers to protect the equipment from the weather and enable easy access for maintenance. The upgrade in technology achieved NIW’s current and future consent and capacity requirements and delivered the following additional benefits:

New RBC Plant Performance at Keady

Final effluent             Target               Actual

BOD                           <5.00mg/l          4.96mg/l
SS                              <10.00mg/l        10.00mg/l
NH4-N                        <1.50mg/l          0.23mg/l

95% ile compliance basis.


Keady WwT Works, Large Diameter RBCs under construction.

Design Features

  • Robust and consistent performance during Winter and Summer periods, ensuring discharge consents are met all year round.
  • Substantial underground installation to minimise the visual and  environmental impact on the landscape.
  • Thermostatic temperature control system inside each RBC unit to mitigate sub zero ambient temperatures.
  • Innovative KEE ‘flow control’ mechanism fitted to each RBC to enhance process stability.

Cost Savings

  • 30 years design life, 20 years warranty on structural components.
  • £812,520 energy saving and associated carbon footprint over 20 years.
  • £947,200 OPEX saving due to reduced operational, maintenance, labour, spares and sludge disposal costs over 20 years.
  • 30% saving in CAPEX costs when compared to an equivalent sized ASP (MBR) system.

Keady Wastewater Treatment Works is just one example of the many projects being undertaken by NI Water and KEE to improve infrastructure in Northern Ireland. These projects represent part of a £490 million investment by NIW in wastewater services throughout the North over the past three years.

For more information on KEE’s latest NuDisc® RBC, please visit our website or call KEE Process on: 01296 634500

KEE design upgrade solution for Anglian Water using NuDisc® Technology

“ I had not personally worked with KEE before and I was impressed with their ingenuity and their unwavering commitment to deliver the upgrade at Brinkley on time and to a high standard. It is refreshing to work with a company that do not have a ‘fit and forget mentality’ and have a genuine passion for the service they give their customers. If ever I need some expert advice or another Waste Treatment Plant, I will not hesitate to contact KEE. ”  Gavin Pipe Anglian Water.


KEE have been working with Anglian Water for over 30 years and were commissioned to design and install the original B16 Rotating Biological Contactor (RBC) at their Brinkley site back in 1983. Following mechanical failures well past the 30 year manufactured design life of the plant, Anglian Water knew 3 years on, that the site was in need of re-furbishing. Therefore they installed a temporary SAF Treatment Plant to be set up on site to treat the waste whilst they sourced and installed a replacement RBC.

Unfortunately the temporary SAF Plant kept ‘tripping out’ and proved unable to treat the effluent to the correct consent levels so Anglian Water had no option but to have the effluent removed from site manually using tankers.

The Challenge

At this point Gavin Pipe, Project Engineer for Anglian Water at Brinkley contacted KEE to arrange a site survey and quote for a new RBC replacement. Upon arriving on site, KEE noticed that Magnasol was being used to neutralise ammonia from the B16 discharge in order to achieve the required environmental consent levels. It was therefore clear that the old plant was not achieving today’s environmental standards without chemical intervention.

Anglian Water , Brinkley

The Solution

KEE recommended upgrading the old RBC with KEE’s latest NuDisc® Design Technology.  The proposed refurbishment included the following benefits:

  • NuDisc® technology delivering substrate and flow balancing
  • 20 years extended life of the plant for a third of the cost of a new plant
  • Elimination of chemical dosing resulting in a cost saving of £3,800 p.a
  • Reduction in the need for de-sludging and tankering from site, therefore minimising tankering costs, heavy traffic and noise through the residential estate
  • 3 day refurbishment installation program, providing huge savings in project management, human resource, and re-build costs when compared to a new installation
  • Chemical free solution, protecting the environment

Anglian Water, Brinkly

Anglian Water agreed to KEE’s proposal and the new RBC was installed on the 26th of September. The installation took the scheduled 3 days to complete and the Brinkley site is now back in full working order, benefiting from the very latest solutions in mechanical engineering and process technology.

For more information on KEE’s latest compact, self contained NuDisc® RBC, please call KEE Process on: 01296 634500 or visit the KEE Group website.