Welsh Water has set ambitious targets for reducing greenhouse gas emissions across their entire operation.
To help meet these goals, they are implementing measures that reduce electrical energy consumption at key wastewater treatment sites.
The Activated Sludge Plant is a very effective process for the removal of biodegradable nutrients from wastewater streams, but typically requires high amounts of energy to supply oxygen to the biomass.
It can also be difficult for operators to optimise these process units, due to the highly variable incoming load they receive, and the complex interactions within the plant.
The project reduced aeration energy consumption by more than 25% and was put forward for both the IWA and WWT Innovation awards, which it won. Read more...
Following similar projects undertaken for Northumbrian Water, Yorkshire Water and United Utilities, Perceptive Engineering was commissioned by DCWW to conduct a detailed assessment of process performance at a municipal site in South Wales.
The Perceptive Audit suggested there was a significant potential for energy saving – 17% reduction in aeration energy – without compromising the quality of final treated water. A data-driven, model predictive control scheme was commissioned in 2012. Welsh Water’s engineers installed ammonia probes on the inlet and outlet of the ASP (one probe at each point).
After commissioning, site operators were able to open the controller constraints to fully exploit efficiency gains. Based on the first few months of operations, electrical blower energy has reduced by more than 25%. Ammonia control is more robust than before and the risk of compliance failure is reduced.
The site has seasonal consent limits; the next phase of the project is to adjust ammonia targets closer to the higher winter-time values, which will permit further energy savings. Once this is proven, seasonal selection will be made automatically by the new control scheme.
“We are exploring how we can best control the process during TRIAD periods, when minimum energy consumption is the target. The Perceptive system will help us to do this while staying within compliance limits. We are also going to investigate if we can automatically capture additional energy savings during high tariff periods."
Adam Fairman, Energy Innovation and Programme Manager, DCWW
Our Clients & Partners
Selection of our clients and key partners we work with to improve process efficiency
Throughout development to manufacturing, data is key to enable rapid response to market demand. The knowledge to enable intelligent decisions and the wisdom to optimise the complete product lifecycle is now at your fingertips. The latest release of PerceptiveAPC v8.0 delivers the next
PD2M May 18-20 2021 Virtual This is the place to explore what pharmaceutical manufacturing will look like in 2030, sharing discussions on new ways to develop medicines. How will Industry 4.0 enable us to respond to market demand, delivering flexible, modular manufacturing and bringing
18-19 May 2021 Virtual Perceptive Engineering - an Applied Materials company - is looking forward to participating in the Bionow Pharma Manufacturing Conference 2021. We will be joining AstraZeneca and Bristol Meyers Squibb in session 2, discussing the ‘Digitisation of Pharma