Optimization of Decoloration Conditions of Methylene Blue Wastewater by Penicillium P1

The objective of this work was to optimize the decolorization of methylene blue dye wastewater by Penicillium P1. The influencing factors included initial methylene blue concentration, initial pH value, salinity and inoculation percentage of penicillium spores. The decolorization rate was optimized by response surface center composite design methods. The optimal optimization condition was methylene blue concentration 50 mg/L, pH value 3.61, salinity 3.7%, and inoculation percentage 3.21% (When the MSM was 100 ml), the predicted decolorization rate of methylene blue 85%. The UV and the FTIR spectrum analysis showed that the structure of methylene blue changed during the process of decolorization of methylene blue by Penicillium P1.