NITRIFICATION WITH IMMERSION PERCOLATING FILTERS - Wider uses for new technologies even in large sewage works
New process technologies have considerably improved the specific nitrification capacity per unit area of immersion percolating filters. The operating principle is based on strict separation of the carbon reduction and nitrification processes together with uniform substratum supplies in cascade plants. These processes lake the immersion percolating filter viable even for high capacity plants. The method is patent pending.