曝気槽の酸素移動からみた活性汚泥法の浄化機能に関する動力学的研究 : 曝気槽の総括酸素移動容量係数算出法とその応用に関する研究 (第7報)

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Theoretical and experimental studies on the kinetic model of oxygen transfer and BOD removal were carried out for complete-mixing activated sludge processes. Under steady state conditions, effluent substrate concentration was predicted by the equations containing activated sludge retention time and containing specific oxygen uptake rate. L_e={(K_m(1+bt_s))/(t_s(Yk-b)-1)}^<1/n> l_e={(K_m(k_r-b'))/(Y'k-(k_r-b'))}^<1/n> The former equation was suitable for the optimum control of activated sludge processes. The latter equation was difficult to use as the controlling formula, but the activated sludge retention time was predicted by measuring specific oxygen uptake rate.The overall oxygen transfer coefficient and dissolved oxygen concentratioin were correlated with the activated sludge retention time and the following equation predicted the dissolved oxygen concentration in the aeration tank under the steady state condition. C_L=C_S-S/(K_La)((Y')/Y・b+b')-S/(K_La)・(Y')/Y・1/(t_s) The above three equations were verified by experimental studiesd using a bench scale activated sludge apparatus.
公益社団法人日本生物工学会の論文
1976-09-25