Water & Wastewater Treatment

WWT PUMP AND VALVE SUPPLEMENT 2019 9 discussions with the Morrison Utility Services team to gain a better under- standing of where any pumps could be positioned, given the busy high street setting and restricted excavated void. It also ensured that the proposed solution delivered an efficient, reliable and cost-effective overpumping solution. To address the required flow rates and the space restrictions, the company recommended a 12" electric UV301M pump, which is suited to sewage overpumping applications. A prime- assisted, surface-mounted pump capable of delivering a maximum flow of 400 litres per second and a maximum head of 36 metres, it more than met the needs of the anticipated ground water volumes. The team at Sykes Pumps specified the pump with additional capacity built into the calculations to factor in the potential for rainfall. The UV301M was used with a variable speed panel so that it could easily be adjusted to suit flow requirements in real time by the Morrison team. Using a pump designed for wastewater environments meant that the equipment was able to handle any residual sewage in the flow, while offering an efficient and cost-effective solution for the contractor. The need for an extended discharge run of 380 metres to enable groundwater and any residual sewage to be over- pumped to the outpour sewer also influenced the choice of pump, with the 12" UV301M pump ensuring that head and flow rates could support the required distance. The tight excavation void was a challenge addressed by using the UV301M, which is a pump mounted within a frame in a horizontal position. Along with the pump, a generator was provided to power the equipment on site and enable rapid site setup of a complete turnkey solution, thereby avoiding any delays to the repair programme. In order to preserve fuel and activate the pump only when the water in the excavated void reached unsafe levels for the contractor's team, the equipment was fitted with a float switch and control panel. This ensured that the pump could remain in continuous operation without over-running when not required. Rapid response Pump equipment is oŽen required on site quickly in response to leaks or flooding but the installation of an overpumping solution for the Beckton sewer main repair project was particu- larly rapid, thanks to the Sykes Pumps depot network and asset availability. The pump solution was installed and fully operational within hours of the enquiry being received, with close cooperation between the Sykes Pumps team and the contractors playing an important role in fast-tracking the specification and site set-up to deliver a quick turnaround. The required equipment and 380m of pipework was procured from the local Sykes Pumps depot and transported to site using vehicles from both Morrison Utility Services' and Sykes Pumps' fleets. A Sykes Pumps engineer then attended site to set up the pump and carry out all connections with the control panel and the generator. This ensured that the Morrison Utility Services team responsi- ble for repairing the damaged area of the main could get to work as quickly as possible. The overpumping solution success- fully de-watered the work area, diverting the groundwater to the outpour sewer. It also provided a flexible response so that Morrison Utility Services could move to different locations on the network if additional bursts occurred. Throughout the project, Sykes Pumps continued to support the Morrison Utility Services team with fortnightly maintenance visits. A call out service with a four-hour response time was also included within the hire agreement but this was not called upon as the pump and ancillary equipment remained fully operational throughout the sewer main repair project.

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