BIO-BLOK® is the ideal filter medium for new wastewater treatment plants as well as for renovation of existing installations. ... Compared to traditional activated sludge treatment plants, the application of the BIO-BLOK® elements could increase the efficiency by up to four times. Therefore, in most cases the installation costs are reduced significantly. The BIO-BLOK® elements, developed by EXPO-NET Danmark A/S, are well-tested products that have proved to be very efficient in the bacteriological treatment of domestic sewage, industrial wastewater and water from aquaculture. read more