Project overview

Located to the east of Stafford, Severn Trent’s Brancote Sewage Treatment Works (STW) catchment will see an increase in population from 78,075 current population equivalent (PE) to 85,532 by 2028. The site is split into two distinct areas with the STW processing the sewage flows from within its own catchment and the sludge treatment centre (STC) processing indigenous sludge from the works as well as imported sludge from some nine other smaller rural STWs. Brancote STC has been designated as having rural works status; based on the sludge strategy alignment process carried out in AMP5, the site’s single digester will be shutting down and the works will convert to a strategic raw sludge dewatering site. Brancote STC will be required to dewater raw sludge to 25% dry solids (DS) which will be transported to the thermal hydrolysis plant at Strongford STW for advanced digestion

Mealey Electrical Contractors Ltd. Were instructed by NMCN to carry out the design, installation and commissioning of the electrical system, power, and control elements. We worked alongside NMCN to put together containment route installation of heavy gauge tray galvanised after containment systems that were suitable to the environment that they were installed into. Once the route and designs were agreed we install all containment require for all system. We developed a cabling schedule for all power items and controls. We also put together an electrical design based on the design criteria whilst maintaining consideration for the installation method and cabling lengths. To achieve this, we had to gather the relevant information from pump set, distribution, equipment, heating loads and incoming power supplies. Once we were satisfied with our design this was submitted to the client for approval. Once approved, this information was passed onto our installation team to move the design forward.

To help with the installation on site we put together an installation cabling matrix system which included a cabling marking system consisting of cabling types, lengths, and sizes. This ensured efficient ordering of materials and calling off. All the cabling in place was labelled and terminated into the main MCP and field devices. Mealey Electrical provide our own meticulous electrical testing and commissioning of all the different systems. The readings were all recorded on our electrical testing program. Once this information was completed and signed off by the QS, it was issued to the client for approval which will for form part of the operation and maintenance manual for the project.