一色齿毛菌对直接大红4BS染料的脱色

为避免染料废水处理造成二次污染,采用生物法对直接染料进行脱色处理,通过观察接种一色齿毛菌后染料固体培养基颜色的变化,评价一色齿毛菌对5种直接染料的脱色效果;利用单因素和正交试验对一色齿毛菌脱色直接大红4BS的条件进行优化,得到优化条件:葡萄糖质量浓度为20 g/L,硝酸铵质量浓度为1 g/L,硫酸镁浓度为1.5 mmol/L,每50 mL反应体系接菌量为2片(直径为1 cm)。结果表明:一色齿毛菌对5种直接染料均有脱色能力,其中对直接大红4BS染料的脱色更为彻底;在优化条件下,一色齿毛菌对直接大红4BS脱色13 d时的脱色率达92.00%, 与优化前的脱色率相比提高了50.82%。

Optimization of decolorization conditions of Direct Scarlet 4BS by Cerrena unicolor

Aiming to avoid secondary pollution in treating dyeing wastewater and to clarify the decolorization ability of Cerrena unicolor to direct dyes, the decolorization effect of 5 direct dyes under solid condition was detected by Cerrena unicolor. Meanwhile, the decolorization conditions of Direct Scarlet 4BS by Cerrena unicolor were optimized. The results show that 5 direct dyes can be decolorized by Cerrena unicolor, among which, the decolorization performance of Direct Scarlet 4BS is the most obvious. The optimized decolorization conditions of Direct Scarlet 4BS dye by Cerrena unicolor are found as follows: glucose 20 g/L, ammonium nitrate 1 g/L, MgSO₄ 1.5 mmol/L, and inoculation amount is 2 pieces (diameter 1 cm)/50 mL reaction system. Under optimized conditions, the decolorization rate of Direct Scarlet 4BS by Cerrena unicolor is 92.00% at 13 d. Compared with the decolorization rate before optimization, the decolorization rate is increased by 50.82%.