| Abstract |
| Strains degrading and decolorizing reactive dyes, Procion blue H[GN and Procion red HE7B were isolated from water system, are named RBK1 and RBK, the growth characteristics of which were investigated. Decolorization efficiencies after 42hours in batch culture were 95% and 77%. respectively, and the optimal culture conditions of temperature and pH were 30t. and 7.0. Decolorization efficiencies in condition of aerobic shaking culture by strains RBK1 and ARK were conspicuously increased, and culture by strain RBK1 was found as 95% after 42 hours, while standing culture was 64%. Optimum nitrogen source was peptone, and it was found that decolorization efficiencies by strains RBK1 and RRK increased up to 4,OOOmg/ of peptone concentration as nitrogen source, but peptone concentration did not influence the decolorization efficiency of 4,0OOmg/and over. When the concentration of dyes were more than 80Omg/ and 4OOmg/, respectively, the strains RBK1 and RAK. which degrade Procion blue HEGN and Procion red HE7B, showed rapid decrease of the decolorization efficiencies; then the specific grow rate were 0.25h-1 and 0.09h-1. |
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| Key Words |
| reactive dye, strain, decolorization, nitrogen source |
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