WASTEWATER PROCESSING APPARATUS WITH TWO STAGES DUAL-MEDIA BIOLOGICAL FILTRATION PROCESS

摘要

PURPOSE: A wastewater treatment apparatus with a two-stage multilayered biological filtration process is provided to secure good processed water by maximizing solids backward flowing performance while minimizing loss head efficiently. CONSTITUTION: A wastewater treatment apparatus with a two-stage multilayered biological filtration process includes a step for performing a biological filtration process by arranging a one-stage multilayered biological filtration process and a two-stage multilayered biological filtration process. A medium used in the wastewater treatment apparatus comprises a dipping type lower medium used in the one-stage multilayered biological filtration process, the dipping type lower medium used in the two-stage multilayered biological filtration process, a floating type upper medium used in the one-stage multilayered biological filtration process, and the floating type upper medium used in the two-stage multilayered biological filtration process.