Project Overview

Beckton Sewage Treatment Works (STW) located in the London borough of Newham is currently Europe’s largest, treating the waste of over 3.5 million people. Thames Water are currently completing a £190m project to upgrade and expand the works which will treat sewage to a higher standard and will enable the site to treat 60% more sewage than it currently does and allow for a 10% population increase.

The Issue

Sewage treatment works and pumping stations have the potential for causing odour issues which can be a nuisance for nearby residents. Sewage is itself an odorous substance which requires treatment quickly so that it does not decay within the treatment process, which could increase odour levels.

As part of the recent upgrade works at Beckton STW, a further £67m has been invested as part of a separate project to significantly reduce odour levels around the site, including 16 primary settlement tanks, an area the size of 10 football pitches which comprises the installation of both odour containment covers and odour removal plant to significantly reduce odour emissions by 50%.

KEMADA were appointed as the preferred electrical contractor for the installation of the processing plant for the treatment of odour under containment on the primary settlement tanks, settled sewage channels and new raw sludge pumping station wet well. Their supply included a full electrical package consisting of control and automation of the processing plant, control panel, instrumentation and site cabling.

The Solution

K.LITTLE CONTROL SYSTEMS were appointed the task of providing KEMADA with the design, manufacture and commissioning of two Form 4 control panels and programmable logic controller (PLC) software for complete control of the two odour control plants and communication to the works SCADA system. Due to the physical size of the odour control plants, the control panel needed to be big enough to house 90kW inverter drives for the extracts fans as well as starter sections for the irrigation pumps and an 85kW heater bank with all signals from each section coming back to the PLC section which could then be relayed on to the site SCADA. Various instruments covering humidity, temperature, hydrogen sulphide (H2S), pH/ORP & pressure formed part of the processing plant and were fundamental to the control and operation of the plant.

K.LITTLE CONTROL SYSTEMS carried out the full electrical design, manufacture and test documents of the control panels before having a FAT (Factory Acceptance Test) at our workshop before transporting to site ready for commissioning.

The Outcome

Both systems were put into operation after testing and commissioning had completed and have successfully completed a long running period without any issues. Working closely with our clients gave us the best chance to make sure we met all requirements from Thames Water standards to meeting all the requirements of BSEN 60439-1

The good working relationship K.LITTLE CONTROL SYSTEMS had with Kemada and all other parties ensured that our supply was a huge success and met the expectations of everyone involved in the project.