細菌によるフラル酸エステル類の分解

概要

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Environmental pollution by industrial products and wastes is increasing with the development of chemical industry. Phthalic acid esters are manufactured in large amounts as a plasticizer and accumulating enormously. Microbial degradation has been undertaken and has succeeded for very low concentration (0.1%), but is not applicable to waste treatment. We tried the microbial degradation of dioctylphthalic acid (DOP) and dibutylphthalic acid (DBP), the most common esters.We isolated the bacterial strain PB73 as a DBP utilizing bacterium and the strain PO32 as a DOP utilizing bacterium. Strain PB73 degraded 90% of DBP and strain PO32 80% of DOP in a medium containing 1% phthalic acid ester in 60 hr. Both strains could grow on a medium containing more than 20% of the respective ester. The optimal growth of strain PO32 was obtained at pH 7.4 at 34℃, and of the strain PB73 was similar. Strain PB73 could degrade diethylphthalic acid (DEP), DBP, and butylphthalyl butylglycolic acid (BPBG), but not DOP. Strain PO32 could degrade DEP, DBP, DOP, and BPBG. Neither strain could degrade dimethylphthalic acid (DMP), telephthalic acid, and its esters.
社団法人日本生物工学会の論文
1976-09-25