The treatment of textile-dyeing wastewater by double anode electro-Fenton process
Aimed at the problems of low efficiency and high cost of conventional treatment of textile-dyeing wastewater,the process conditions of double anode electro-Fenton method were studied.This paper,taking a textile-dyeing wastewater of dyeing enterprises in Jiangxi Province as the research object,through single factor control variable method to analyze the influence of each factor on its treatment effect.The results showed that:the double anode electro-Fenton process achieved the best treatment effect under the conditions of amount of column carbon(Ф=4 mm)was 400 g/L,electrolysis voltage of 10 V,H2O2:Fe2+(molar ratio)of 20:1,FeSO4·7H2O dosage of 1.6 g/L and electrolyte(NaCl)dosage of 1 g/L.After 3 hours of reaction the removal rate of COD was 90.46%,the removal rate of color was 98.99%,and the removal rate of UV254 was 98.85%.Iron sludge was used as the iron source for double anode electro-Fenton system,and under the conditions of pH=2 and iron sludge dosage of 1.46 g/L and other conditions unchanged,the removal rate of COD was 90.05%,the removal rate of color was 98.17%,and the removal rate of UV254 was 98.28%.Double anode electro-Fenton method can effectively treat textile-dyeing wastewater,and has a higher removal rate of UV254,chroma and COD.Using iron sludge as the iron source for double anode electro-Fenton process presents a new alternative for the reusability of iron sludge.
NETL
NSTL
万方数据
