含シアン廃水の活性汚泥処理に対する米糠の効果 : 含シアン廃水の生物学的処理に関する研究(第4報)

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The effect of rice bran as a supplementary nutriment on a two step aeration activated sludge process for waste water containing cyanide was studied.Micro-organisms able to degrade cyanide grew with addition of rice bran in the first aeration tank, so that overall cyanide degradation activity in the reactor increased.43 m mole oxygen was required for oxidation of 1 g rice bran. Addition of 0.233g/l rice bran to the first aeration tank increased the endogenous respiration rate to 0.38 m mole-O_2/l/hr indicating increased microbial concentration.After complete oxidation of the rice bran component, the endogenous respiration rate decreased in accordance with the unimolecular second order reaction equation and its rate constant was 0.03 l・m mole-O_2^<-1>.Without rice bran addition, it was difficult to maintain a high level of cyanide degradation activity.In the absence of cyanide, the ratio of cyanide degradation activity to endogenous respiration rate (υ/γ_e) was decreased.
社団法人日本生物工学会の論文
1976-07-25