General planning of the new wastewater treatment plant for 21 communities

Generating energy while treating wastewater

The new wastewater treatment plant for the 21 municipalities of APEC (Association Intercommunale pour l'épuration des eaux usées de la Côte) in Gland (VD) will have a capacity of 73,000 p.e. and is expected to be put into operation in 2026. Sophisticated nitrogen treatment will be provided by an aeration tank using an A/I (alternate, intermittent aeration) process. Trace elements will be treated with granulated activated carbon. Energy autonomy – both electrical and thermal – will be of great importance. Excess plant heat will be fed into the local heating network of the town of Gland and the treated water will generate power as it passes through a turbine on its way to being discharged into Lake Geneva.