Energy Use and Carbon Footprint for Waste Water and Sludge Treatment

Wall, D. and Holland, G., MWH Global, UK


The water industry uses 3% of UK electricity and is rapidly becoming aware of its contribution to global
warming, through its consumption of energy and other consumables.
Waste water and sludge treatment is an area that has the potential to use a significant quantity of energy
but also the potential to generate renewable energy.

This paper examines the operational carbon footprint of several waste water and sludge treatment plants
based on typical process selections for a given set of site constraints. It compares carbon footprints for sludge drying, anaerobic digestion, BAFFs and ASPs. It demonstrates the
significant effect process selection has upon carbon footprint. The most energy efficient process had a
carbon footprint 1.6 times less than the process selected to meet the most stringent site space

The paper also quantifies the important role of anaerobic digestion in recovering energy from waste
water. In doing this it shows the need to optimise sludge harvesting from secondary treatment.

Waste Water Treatment; carbon footprint; sludge treatment; GHG emissions; renewable energy; sludge

Please fill in your details to download the proceedings

For more information about how Aqua Enviro
can help you, contact us...

8 Appleton Court, Calder Park, Wakefield, WF2 7AR, UK

Consultancy and Laboratory services: + 44 (0)1924 242255

Conferences and Training enquiries: +44 (0)1924 257891


  • By submitting this form, you agree that we may use the data you provide to contact you with information related to your request/submission and other relevant Aqua Enviro services. You can unsubscribe from Aqua Enviro marketing emails at any time by clicking the unsubscribe link in the email. To learn more, see our Privacy Policy