PURPOSE: Particles for supporting microorganism having extremely improved adhesivity to microorganism, having a particular specific gravity, obtained by attaching an inorganic or organic substance having specific particle diameters to the surface of expanded synthetic resin particles.
CONSTITUTION: One or more substances selected from an inorganic substance (e.g., sand, natural ground stone, silas ballon, ceramic, etc.) and an organic substance (e.g., anthracite, coal, coke, rubber, etc.) having praticle diameters ≤1/3 of expanded synthetic resin particles and ≥50μ are attached to the surface of the expanded synthetic resin particles (e.g., particles consisting of a material such as PS, PE, PP, etc.), to give particles for supporting microorganisms, having a specific gravity of 0.2W1.0. When the particles to be attached to the synthetic resin are concentrated to only the surface of the resin and crosslinking phenomena will not take place, many improvements are attained, for example, the expansion magnification of the resin is made high so that its amount is reduced, the surface of the expanded particles are made rough so that hydrophilic nature is increased and adhesivity to microorganism is improved, and the adjustment of specific gravity of the expanded articles is carried out easily.
YUSHINA YOSHINORI
KURIMA AKINORI
