生物膜付着担体としての転炉スラグの特性

概要

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Slag has been considered to be a useful biofilm support because of the continual release of minerals in water environments. In this study, the characteristics of a converter slag as a biofilm support were examined from aspects of mineral sources and surface microstructure. Four types of support material: converter slag, the slag melted at 1700°C, basalt, and limestone, were prepared for comparative experiments. The highest density of biomass was found in the converter slag, followed by the melted slag, basalt, and limestone. From the observation of support surface by a scanning electron microscope, it was found that the slag had an intricate microstructure, and basalt and limestone were rather flat. The melting process of slag destroyed the surface microstructure and decreased the adherence of biofilm. However, the process did not change amounts of mineral released from the slag. Results suggest that the surface microstructure of slag, rather than release of mineral from slag, has an important role for the attachment of high-density biomass.
社団法人　日本水環境学会の論文
2004-05-10