水質汚濁防止に関する研究(第5報)活性汚泥ならびにZoogloeaに及ぼす重金属の影響

概要

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Effect of various heavy metals was examined by experimental purification with activated sludge process using an artificial waste water. Presence of some heavy metals in the drainage water showed distinct obstacle on progress in the treatment. Especially, the chemical oxygen demand removal rate was decreased by the addition of Hg^<2+>, Cu^<2+>, and Ni^<2+>, but Zn^<2+> and Pb^<2+> did not show a marked effect at the tested concentration of 1 to 40 ppm. Effect of heavy metals on the reduction activity of triphenyltetrazolium chloride (TTC) on activated sludge was similar to the above results, and Pb^<2+> showed little or no inhibition at 40 ppm. It was found that TTC reduction with dehydrogenase activity of Zoogloea and Sphaerotilus was largely inhibited by 2×10^<-5>M of Hg^<2+> (4.01 ppm) or Cu^<2+> (1.27 ppm). From these results, measurement of TTC reduction rate by dehydrogenase activity of activated sludge or Zoogloea was considered to be valuable as an index of purification-inhibition by influent of inhibitors such as heavy metals.
社団法人日本薬学会の論文
1977-08-31