活性スラッジによる産業廃水の処理に関する研究 : (第12報)諸条件下における活性スラッジの酸化活性の変化について

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The oxidative activities of activated sludge under various conditions were measured by the Warburg manometer. The endogenous respiration rate of the activated sludge cultured with synthetic waste consisting of glucose, peptone and KH_2PO_4 was from 5 to 7 μl/mg/hr at pH of 7.0 and of temperature of 30℃.The optimum pH and temperature of the activity were nearly 7 and 35℃. In the range of 500 to 5,000 ppm of the sludge concentration, the activity increased in proportion to the increase of the concentration. However, when the concentration increased above 5,000 ppm, the increase rate of the activity was relatively slow. The O_2 uptake rate differed by the concentration of substrate. Under the condition of low concentration, the rate increased according to the increase of concentration. However, at a comparative high concentration, the rate showed little relation to the concentration.When the activated sludge was left under staryed aeration for a few days, the pH of the mixed liqueur droped to about 4 from 7.5,and the activity decreased rapidly. On the other hand, regarding the anaerobic settling, the pH did not change, and the activity was kept stationary for several days.The oxidative activities were easlily influenced by the inhibitors. In the case of pentachlorophnol sodium salt, the activity was inhibited about 30% with the addition of 25 ppm. The activity was inhibited severely when pH, temeprature and the sludge concentartion were lower, and the concentration of substrate was higher. It was found that the activated sludge acquired considerable resistance by acclimation to the medium containing the inhibitors.
社団法人日本生物工学会の論文
1967-09-25

活性スラッジによる産業廃水の処理に関する研究 : (第12報)諸条件下における活性スラッジの酸化活性の変化について

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