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Decoloring Effect of Acid Brown Dye PR by Mold Pellet WY

WANG Guohui(School of Enviromental Sciences and Engineering,Sun Yat-sen University,Guangzhou 510275)  
Mold pellet WY was studied on its decoloring characteristics of acid brown dye PR and effect of real printing and dyeing wastewater.WY had a wider decoloring temperature range.In the range of 25-50 ℃,the decoloring rate of PR was over 92%.The optimum decoloring temperature of pellet WY was 45 ℃,where the decoloring rate of PR reached 97.92%.The optimum pH of pellet WY was 5.0 and the optimum shaking speed was 90r/min and the corresponding decoloring rate of PR was 93.73% and 92.45% respectively.In the range of dye concentration of 100~300 mg/L,WY had high removal activity of dye PR and the removal rate reached 88.71%.Pellet WY needed some nutrition for the decoloration of PR WY had a wider range of carbon sources and nitrogen sources for the decoloration of PR.Waste milk was used as a nice nutrition for WY.The decoloring rate of milk-made pellet WY for PR.was 75.94% and 98.06% respectively when waste milk was added at 2% and 10% to the culture without carbon and nitrogen sources.Pellet WY had better decoloring activity for real printing and dyeing wastewater,with decoloring rate 86.24%.Methanol had good desorption effect with desorption rate 97.17%.After desorption,the pellet still had good decoloring effect and the decoloring rate was 93.78%.Pellet WY could be reused.
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