Implementing smart energy management concepts in WWTPs






In the map below, you can find examples of water protection measures within this topic. These actions are picked from the Bank of Actions - if you are interested to browse other water protection actions, visit the Bank of Actions.


Awareness raising

Hazardous materials

Littering etc.

Oil spill prevention

Research and monitoring

Shipping and boating

Stormwater management

Strategies and programs

Wastewater management


Drainage basin

Biogas from beach cast algal masses

Actor: Trelleborg municipality   ●   Year: 2011   ●   Address: Smygehamn, Trelleborg, Sweden

In Trelleborg the consequenses of eutrophication are visible when marinas and beaches are covered with philamentous red algae. To create a resource from this biomass, it is collected and used to produce biogas in a two step-biogas facility close to Sweden's southermost point, Smygehamn in Trelleborg. © Trelleborg


Algae biogas plant has been running since May 2014 (pilot plant since 2011) and it treats 500-1000 m3 algae/year. It was financed by EU Life (Bucefalos), HaV and NIB. The algae collected in Trelleborg contains about 0,4 kg P and 7 kg N/ t wet weight. If 10 000 tons of algae is collected, this contains 60 t of N and 3,4 t of P. The biogas is equivalent of this is 110 000 liters of diesel.


The beach cast algae contain nitrogen and phosphorus. When the algae is collected, nutrients are extracted from the sea. The algae is used to produce fossil free energy and the residual is returned to arable land as a nutrient source. The coastline is very important for recreation in Trelleborg, and clean beaches and a clean sea is essential for prosperity in the region. © Trelleborg

Background information

Further information

Name: Matilda Gradin   ●  Email: matilda.gradin (a)   ●  Web page:

Guidelines & Recommendations

Guidelines & Recommendations