Smart. 
Simple.
Energy from
clearing sludge.
We turn your business
into electricity.
FACTS
- E_OS reduces carbon dioxide by about 40,000 tons per year. From 2020, the main sewage treatment plant will produce 15 GWh of electricity and 42 GWh of heat in excess of its own consumption.
- The Wien Energie waste incineration plants recycle about 900,000 tons of rubbish, hazardous refuse and clearing sludge per year. The co-generated heating energy (about 1.5 million MWh per year) is fed into the district heating network throughout the year.
- Water consumption in Vienna has been receding since 1970. It is now 25% lower, despite population growth.
Energy footprint of Vienna’s main sewage treatment plant
2020 forecast (following E_OS implementation)
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„Energy efficiency and the production of ecologically sound energy are significant goals of Vienna’s main sewage treatment plant, which is run by ebswien. The project Energie-Optimierung Schlammbehandlung (E_OS) aims to establish the best possible exploitation of the energy contained in clearing sludge. The sludge that emerges as ‘waste product’ during the treatment of waste water is thickened and heated to 38 degrees Celsius. It is then pumped into a total of six septic tanks, each of which is 35 meters high. Sewage gas develops in these air tight containers – altogether 75,000 cubic metres. Two thirds of this gas is energy-rich methane. Co-generation plants turn the sewage gas into electricity and heat. The E_OS project reduces carbon dioxide emissions by 40,000 tons per year. From 2020, ebswien will be fully energy self-sufficient: this is an important contribution to Vienna’s climate protection goals.“ Miklos Papp, Project Manager, ebswien
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