Case Studies

Cardiff Western District Sewage Pumping Station (CWD SPS) receives sewage from the western area of Cardiff for onward pumping to Cog Moors WwTW via twin rising mains. The pumping station is a strategic asset and is operationally critical to Welsh Water. Failure of this asset would have severe business impacts. During AMP6, a root cause […]

Minimising energy consumption and CO2 emissions are at heart of all modern water companies and the 2030 net zero carbon emission target can only be achieved if real and direct effort is dedicated to this. The pump efficiency programme described within this article is a major part of the energy efficiency strategy undertaken by South […]

Located in Saltend, Yorkshire Water’s Hull WwTW provides sewage treatment for a population equivalent of over 1 million people, covering an area from the west of Hull to Hedon in the east. This case study follows on from an initial paper in 2020 and details the progress of the new inlet works and the refurbishment […]

The advanced anaerobic digestion (AAD) plant at Howdon STW includes 3 (No.) MWM gas engines that were commissioned in September 2013. The engines originally used biogas from the digestion process as fuel to produce steam for the thermal hydrolysis plant and generate electricity. The electricity generated by the engines when running on renewable biogas is […]

Hull WwTW located at Saltend, east of Hull, provides sewage treatment for a population equivalent of over 1 million people, covering an area from the west of Hull to Hedon in the east. The existing treatment works was built over 20 years ago and required some specific upgrading and refurbishment. The primary drivers for the […]

United Utilities (UU) provides water and sewage services to around seven million people in the north-west of England. As energy is one of UU’s biggest costs the mantra is to use less, generate more and use the company’s assets in a smarter way. It was ‘getting smarter’ that led to pioneering Dynamic Demand. A few […]

Energy is typically the second highest operational cost behind labour for a water utility. It is a cost that is growing as tariffs increase but one that is controllable, given the right access to assets (pumps and valves), storage tanks and an energy tariff that rewards electrical load management in both time and peak demand. […]