| 摘要 |
PURPOSE:To obtain a carrier from which microorganisms are not released with impact by crushing an expandable mineral, an inexpandable mineral, or a refractory, granulating, calcining, and molding into an inorganic foam granular body having >=2mm. mean diameter and <=1.5sp.gr. CONSTITUTION:An expandable mineral, an inexpandable mineral, or a refractory are added with a foaming agent and a vitrifying component when needed, crushed, and granulated. Then the air bubbles are formed at the inside by calcination, and the material is molded into a microorganism carrier consisting of an inorganic foam foam granular body having >=2mm. mean diameter and <=1.5sp. gr. Although the shape of the carrier may be spherical, columnar, or the like, the uniformity of the calcination is damaged when the shape is too flat. Pearlite, FeS, etc. are used as the foaming agent, and SiO2, CaO, FeO, etc. are used as the vitrifying component. Said carrier can be applied to either a submerged type or a floating bed type.
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