Coriolus versicolor催化酸性橙降解的研究

Study on the Coriolus versicolor catalyzed degradation of acid orange

对利用白腐真菌Coriolusversicolor的菌丝球来催化染料酸性橙的降解作了报道。首先进行了不同初始浓度酸性橙的降解实验。在实验范围内 ,降解率随着初始浓度的增高而增高 ,平均降解率在 91%左右。建立模型拟合了同一温度下不同初始浓度酸性橙降解的过程。初始浓度在 2 0 99到 10 1 6mg L之间时 ,模型计算值与实验值大致吻合。考察了pH和温度对酸性橙降解的影响 ,发现菌丝球降解酸性橙的最适pH为 6 0 ,温度以 32℃左右为最佳。对补充了不同量碳源的酸性橙溶液进行重复分批降解实验表明 ,碳源的补充对重复分批降解是必不可少的。在重复过程中 ,降解率呈下降趋势。但在降解染料的同时添加适量的葡萄糖可以使菌丝的使用寿命显著延长。

The purpose of the work was to utilize mycelial pellets of the white-rot fungus Coriolus versicolor to catalyze the degradation of the dyestuff with Acid Orange as an example. The degradation of Acid Orange at different initial concentrations was investigated firstly. The results showed that the degradation ratio increased with the increase of initial concentration of substrate. The average degradation ratio was about 91%. A mathematic model was established to simulate the degradation curves. When the initial concentrations were ranged from 20.99 to 101.6 mg/L, the calculated results were in good agreement with the experimental data. The effects of temperature and initial pH on the degradation were also studied. The optimum temperature and initial pH were around 32℃ and 6.0, respectively. The repeated batch degradation processes of Acid Orange with different glucose concentrations indicated the necessity of the addition of carbon source. With the repeat using of mycelia, the degradation rate was decreasing. The addition of glucose in the repeated batch process will extend the life of mycelium.