Patent ID: 9718004
Date: 2017-08-01
CPC Classifications: B01D

Claim:
1. A filter medium layer comprising: a plurality of filter media bodies that are in contact with one another and are separable from one another, the filter medium layer being configured to capture suspended solids contained in a liquid to be treated in gaps between the filter media bodies, the filter media bodies being selected from filter media bodies having voids that permit the liquid to pass through the filter media bodies while capturing the suspended solids within the filter media bodies and filter media bodies that do not allow the liquid and suspended solids to pass through the filter media bodies; and a plurality of filtering aids bodies that are in contact with adjacent ones of the filter media bodies and are separable from each other and from the filter media bodies, the filtering aids bodies having voids that are larger than the voids of said filter media bodies to allow the suspended solids contained in the liquid to be treated to pass through the filtering aids bodies, wherein each of the filtering aids bodies includes a core formed of two strands that have been twisted together and a plurality of bundles of fibers that are bonded between the twisted strands, wherein the bundles of fibers are separated from one another by points at which the twisted strands contact one another, wherein the filter media and the filtering aids bodies are mixed together, and wherein the liquid to be treated is filtered by being passed through the filter medium formed by the filter media bodies and the filtering aids bodies as mixed together.