germany-villingen-schwenningen: engineering services./ selection of an engineering office for the new construction of a plant for the removal of trace substances - sewage treatment plant villingen./ the order includes the planning services in the field of civil engineering and machine technology, process and process technology, ei&c technology and structural design for the construction of a system for the removal of trace substances at the villingen sewage treatment plant of the city of villingen-schwenningen, taking into account the system technology currently available on the market, the high operational availability and reliable usability combined with technical innovation.