1887

Abstract

is a sheathed bacterium often found in activated sludge that has a bulking problem. A bacterial strain that is able to degrade the extracellular polysaccharide produced by was isolated. The isolate was a spore-forming, aerobic, rod-shaped bacterium. The Gram reaction was variable or negative. The optimum growth temperature was 30 °C and the optimum pH was 8. The G+C content of the DNA was 55 mol%. The major cellular fatty acid and respiratory quinone were anteiso-C and MK-7, respectively. Phylogenetic analysis based on the 16S rRNA gene indicated that the isolate was a member of the genus . The nearest relative, with a similarity of 94·2 %, was , a bacterium capable of degrading the sheath of . The phenotypic characteristics of the isolate were apparently different from those of related species in the genus . It is proposed that the isolate be designated sp. nov. The type strain is SG (=JCM 12520=KCTC 3919).

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2005-03-01
2020-01-29
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vol. , part 2, pp. 737 - 741

Growth of and EPS degradation by strain SG .

Effect of strain SG on sedimentation of .

SPM observation of incubated without or with strain SG in the manner described in the legend of Fig. B.

[PDF file of Figs A-C](204 KB)



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