--Letter--

Degradation of Disodium Terephthalate by Alkaliphilic Bacterium Strain GS-1

Takayuki DAKE, Daisuke SUGIMORI* and Satoshi NAKAMURA†

Department of Chemistry and Biology Engineering, Fukui National College of Technology;Geshi-cho, Sabae-shi 916-8507 Japan
† Department of Bioengineering, Tokyo Institute of Technology; Nagatsuta-cho, Midori-ku, Yokohama-shi 226-8501 Japan

An alkaliphilic bacterium strain GS-1 assimilating disodium terephthalate as the sole carbon and energy sources was isolated from soil. The strain GS-1 degraded 19.3 mM(1 M=mol/dm3) of disodium terephtalate in 168 h at alkaline condition(pH10) with the growth. The cultures showed degradation lag phase of 72 h before growth commenced. The greatest degradation occurred between 72 and 100 h. The maximum degradation rate was 0.46 mM/h. The doubling time was 9.3 h.


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