 Fuel cell in the sewage treatment plant Stutt- gart-Möhringen, Germany |  Sewage Treatment Plant 1, Grosslappen, Germany |  Sewage Treatment Plant Stuttgart-Möhringen, Germany |  Sewage Treatment Plant Deggendorf-Deggenau, Germany |
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 Central Sewage Plant, Stuttgart-Mühlhausen, Germany |  Central Sewage Treatment Plant Stuttgart-Mühlhausen, Germany |  Sewage Treatment Plant, Stuttgart-Möhringen, Germany |  New Sludge Digestion Plant Stuttgart- Mühlhausen, Germany |
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 CO-Fermentation AGSM Verona, Italy | | | |
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