Candida tropicalisによるフェノール含有廃水の連続処理 : フェノールの微生物学的分解に関する研究(第6報)

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The kinetics of continuous treatment of waste water containing phenol by Candida tropicalis No. 708 were investigated. The maximum dilution rate was 0.25 hr^<-1> for treating an inlet concentration of 2,500 ppm of phenol to give an outlet concentration of phenol below 1 ppm. In this case, the volumetric loading rate was 15 kg phenol/m^3・day. However. "wash out" of organisms occurred at a lower dilution rate when a higher inlet concentration of phenol was used. For example, the maximum dilution rate at which "wash out" occurred was 0.1 hr^<-1> for an inlet phenol concentration of 5,000 ppm. The above phenomenon was caused by the inhibitory effect of the increasing concentration of phenol in the reactor, originating from an increase in the amplitude of the cyclic fluctuation of the concentration of phenol and the cell mass in the reactor with an increase of outlet phenol concentration.Both the saturation constnat, K_s, and the inhibition constant, K_i, for phenol-metabolism by C. tropicalis No. 708 were extremely low in a continuous system. This result showed that the affinity of phenol as a substrate and inhibitor for C. tropicalis No. 708 was very high. Therefore, it was possible that a low outlet concentration of phenol was obtained, even if the dilution rate around the maximum value was adopted. However, the system tended to become unstable due to the inhibitory effect. The results above suggest the applicability of C. tropicalis No. 708 to the treatment of waste water containing phenol by using a continuous recycling system of organisms.
社団法人日本生物工学会の論文
1973-11-25

Candida tropicalisによるフェノール含有廃水の連続処理 : フェノールの微生物学的分解に関する研究(第6報)

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