Surface water run-off should be separated from sewage so water companies can become more energy efficient, the ICE has said.
The ICE’s 2010 State of the Nation report published last week said that reducing the volume of wastewater treatment will be essential to meeting government emission reductions targets.
“We must treat less wastewater, by using regulation to encourage separation of sewage and surface water drainage and using localised natural infiltration techniques in developments,” the report said.
Water industry energy use has nearly doubled since 1990 due to the increase in treatment required by recent water quality regulations, it said. “The industry cannot reduce its carbon footprint enough to meet government targets without large reductions in the volume of wastewater treated.”
Industry body Water UK’s Meeting Future Challenges report published earlier this month expressed similar views.