A MICROBIAL POLYMER THAT CHANGES THE SURFACE PROPERTIES OF LIMESTONE: EFFECT OF BIODISPERSAN IN GRINDING LIMESTONE AND MAKING PAPER

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Abstract
Biodispersan is an anionic heteropolysaccharide produced by Acinetobacter calcoaceticus A2, which is effective in dispersing limestone. The results presented in this report indicate that Biodispersan is also effective as a grinding aid. In laboratory ball mill experiments, addition of O·1% Biodispersan decreased by half the time necessary to grind limestone to fine particles. The Biodispersan-ground limestone was successfully used as a filler in paper made in the laboratory. These results indicate potential industrial uses for this new microbially-produced polymer.

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