Company Steinmüller Babcock Environment from Gummersbach commissioned STAG for the planning, supply and commissioning of San Sebastian, Spain. For the supply of both waste to energy-oves with dry sewage sludge, STAG delivers, the truck reception point, storage and collection. The dry sewage sludge figures with a try substance of 75%. Furthermore, STAG supplies both extraction units and as well the boiler ash removal systems with mechanical and pneumatic transportations into the ash silos. The pneumatic transportation is equipped with in- and outlet valves.