Sustainability

Treatment

Treating wastewater to generate energy

Our Bioresources transport team transport the sludge from across our region into our 30 Bioresources treatment hubs using our fleet of specialist tanker vehicles which operate 24/7. 

Safely turning sludge into renewable energy

At our Bioresources sites we use a combination of advanced and conventional Anaerobic Digestion to process and treat the sludge safely.

Bacteria in our digesters break down the organic matter without oxygen, which creates Biomethane, a 100% renewable energy source.  

Generating power from Biomethane

This Biomethane is burnt through Combined Heat and Power (CHP) Engines and converted into electricity which we use to: 

  • power our sites; or 
  • feed back into the grid 

Alternatively, we can also further scrub and re-inject the Biomethane into the gas network. 

Developing our technology

We’re constantly looking for new technologies to enhance our treatment capabilities.

We already have some Acid Phase Digestion and Thermal Hydrolysis Plants which further assist our anaerobic digestion.

We’re building a further two Thermal Hydrolysis plants and commissioning our first iTHP plant at our biggest site at Minworth.

We are also looking into how to use Biomethane as fuel for our tanker vehicles, as well as using a novel technology to use recovered ammonia and Carbon Dioxide to form a base material which can be further treated to produce highly effective fertiliser pellets.