WASHING METHOD OF TRICKLING FILTER AND TRICKLING FILTER

摘要

To provide a filter media to flow well during cleaning to enable efficient cleaning of the trickling filter.SOLUTION: A cleaning method for a trickling filter having a filter medium layer composed of a plurality of filter media in a water tank, includes a washing step of storing a washing solution in the water tank and stirring and washing the filter medium immersed in the washing solution, in which an average specific gravity of filter medium is more than 1 and 1.15 or less. A trickling filter has a filter medium layer composed of a plurality of filter media in a water tank, and comprises a cleaning solution storage mechanism for storing a cleaning solution in the water tank, and an agitation mechanism for stirring and cleaning the filter medium immersed in the cleaning solution, in which an average specific gravity of filter medium is more than 1 and 1.15 or less.SELECTED DRAWING: Figure 9