シアン含有の産業廃液処理 : (第1報) Fusarium solaniの増殖およびシアン分解におよぼす環境の影響

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Cyanide degradation by F. solani was investigated to obtain the fundamental data for the continuous treatment of wastes. In this report, the relationship among the growth rate, the sporulating ability and the cyanide degradation activity of F. solani was studied under the conditions of various oxygen supplies using several carbon sources. Secondly, kinetics on cyanide degradation by F. solani, concerning the adaptative pretreatment to induce cyanide degradation enzyme system, temperature, pH, sulfite oxidation value and cell mass concentration, were studied.The following results were obtained;1) With increasing of sulfite oxidation value, the sporulating ability and the growth rate increased, however the cyanide degradation activity decreased. While there was no effect of kinds of carbon soruce on the biological characteristics described above.2) Cyanide degradation activity of F. solani depended on the culture age, i.e, the activity was observed remarkably during the growing of mycelium, however, in the period of sporulating and germination it was not presented.3) When F. solani was precultured during 30 hours under the oxygen supply condition of which the sulfite oxidation value was 0.2 mMO_2/l/min, the product value of cyanide degradation activity by cell mass was maximum.4) When the culture of F. solani was not acclimated to cyanide before it is used to degradation of cyanide, about 5-6 hours lag time was observed. However, the lag time was disappeared by the acclimation of cyanide for more than 4 hours in preculture.Cyanide degradation rate could be expressed by the first order reaction rate equation.5) Optimum temperature and pH for the cyanide degradation by F. solani was 25-30℃ and 8.0 respectively, and in this case, the first order reaction rate constance was about 0.8 hr^<-1>.6) The relation between the cell concentration (X) and the time required to get 95 percent degradation of initial cyanide (θ) was indicated by the following equation; θ=1/A・(100)/X where A is the constant and indicate the activity of cyanide degradation.
社団法人日本生物工学会の論文
1967-07-25

シアン含有の産業廃液処理 : (第1報) Fusarium solaniの増殖およびシアン分解におよぼす環境の影響

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