·               Sewerage master plan for the city of Oldenburg

·               Sewerage / Drainage master plan for the city of Magdeburg

·               Lübeck / Hydraulic rehabilitation of sewerage in the area “Roter Hahn”

·               Concrete corrosion and odor nuisance influenced by high H2S concentrations in the combined sewer networks of "Abwasserzweckverband Bodenniederung"

·               Reduction of infiltration at the sewerage network of the Kingdom of Bahrain

·               National Master Plan for Sanitary Engineering Services for the Kingdom of Bahrain

·               Master Plan for the Sewerage Network in the Emirate of Abu Dhabi