Screening of Decolorization Fungus to Rose-Bengal and Optimization of Decolorization Conditions
ZHOU Minghui
ZHANG Huiyun
WANG Zhaomin
YANG Daihu
Abstract：With Rose-Bengal of multi-benzene ring dyes (tetrachloro tetraiodo fluorescein,C20H4Cl4I4O5) as research object,the advantages fungus of removing Rose-Bengal were separated from wastewater of dyehouse by selective medium,the method of liquid culture was used to study the decolorizing performance and decoloring mechanism of the screened strains,to obtain the optimal strain of decolorizing effect.Uniform design was applied for optimizing the decolorization conditions of the optimal strain,to improve its decolorization effect.The results showed that three kinds of decolorization fungus were isolated and purified from the soil,respectively,Penicillium spp,Rhizopus spp,Aspergillus spp,have all good decolorization effect to remove Rose-Bengal,decolorization mechanism is mainly collaborating function of adsorption and degradation,which decolorizing performance of Rhizopus spp and Aspergillus spp are the optimal.By uniform design method,the optimum decolorization conditions were obtained as pH 7.95,the temperature of 25.47 ℃,the speed of 156.29 r/min,decolorizing time 112.99 h,Rhizopus spp inoculation amount 2.74 mL/(100 mL),Aspergillus spp inoculation amount 0.50 mL/(100 mL),dye concentration 0.13 g/(100 mL),the highest decolorization rate 146.44％.
Keywords：Rose-Bengaldecolorization fungusuniform designdecolorization condition
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 103-108 )