The Study on De-coloring and the Dye Removals of Containing Sulfur Black Dye Wastewater by Means of Electrolysis

The removals of sulfur black dye wastewater were studied by electrolysis reactor.Several factors affecting the removal rates of sulfur black dye and color removal,such as electrolysis volt,dye initial concentration,pH values,retention times and the NaCl addition were analyzed respectively.The results showed that the CODcr removal rate was about 87.69% in 4 h and in condition of pH=7,electrolysis volt=24V,electrolysisI=0.19 A,and the NaCl addition separately. Based on the above electrolysis conditions,the dye wastewater from the dye factory was disposed of,and the removal rate should reach 81.73%.Moreover,the problem in the disposal of dye wastewater by means of electrolysis and the development trend were also discussed.