BIOLOGICAL CONTACT FILTER MEDIUM, BIOLOGICAL CONTACT FILTRATION DEVICE, AND METHOD FOR PRODUCING BIOLOGICAL CONTACT FILTER MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a biological contact filter medium in which the height of a filter medium layer can be made low, and the service life of the filter medium is long, and having high durability, and a biological contact filtration device filled with the filter medium.SOLUTION: Provided is a filter medium obtained by heat-molding thermally fusible chemical fiber free from biodegradability that crimping is revealed by performing heat treatment, and in which weight per unit volume is 120 to 250 kg/m, and the side area of the raw material chemical fiber included per unit volume of the fiber filter medium is 24,000 m/mor more.