Water & Wastewater Asia Jul/Aug 2018

WATER & WASTEWATER ASIA July / August 2018 34 / FROM THE GROUND Par t of a comprehens i ve solut ion to el iminate micro pollutants I n July 2011, the wastewater plant at Marienhospital in Gelsenkirchen, Germany, was put into operation. It is the first European wastewater treatment plant that focuses on the elimination of micro pollutants as well as the purification of wastewater from the hospital. The plant was built in line with an EU-project called “PILLS” ( Ph a rma c e u t i c a l I npu t a nd Elimination from Local Sources) under the aegis of theEmschergenossenschaft, the first German water management association. The project´s goal is to eliminate micro pollutants from the sewage water on site, which especially incur in hospitals as residues from pharmaceuticals and radio- opaque substances. About 75,000 patients are treated by approximately 1,200 staff members at the Marienhospital annually The challenge About 75,000 patients are treated by approximately 1,200 staff members at theMarienhospital annually, which results in effluents amounting up to 200 m 3 /d incur. Until now, these effluents were discharged into the nearby river “Schwarzbach” via the municipal canalisation. This creek currently serves as an open sewage water drain outlet, but has been targeted to be renatured so as to operate effluent-free in the course of the conversion. Amongst others, it will also absorb the purified water from the new clarification plant. This new wastewater treatment plant encompasses, besides a mechanical and biological clarification, a variety of treatment processes, such as an ultrafiltrationwith submergedmodules (MBR technology), an ozonisation as well as an activated carbon filtration.