| 摘要: |
| 【目的】印染废水具有浓度高、色度高、成分复杂、难降解的特点，比较了铁炭微电解法和Fenton氧化法处理印染废水的效果。【方法】以取自陕西咸阳第二印染厂的综合废水为供试材料，通过单因素试验，分别对铁炭微电解法和Fenton氧化法处理印染废水的最佳条件进行了研究，并对二者的处理效果进行了比较。【结果】在处理印染废水时，铁炭微电解法的最佳反应条件为：停留时间30 min，进水pH=3～4，铁炭体积比1∶1，此时色度去除率达到80%，COD去除率达到60%；Fenton氧化法的最佳反应条件为：pH=3，停留时间45 min，H2O2和FeSO4用量分别为20，25 mL/L，H2O2分3次加入，此条件下色度去除率达到79%，COD去除率达到80%。【结论】铁炭微电解法和Fenton氧化法对印染废水均有较好的处理效果，可考虑将两者联合运用，以进一步提高处理效果。 |
| 关键词: 印染废水 铁炭微电解法 Fenton氧化法 色度 COD 去除率 |
| DOI： |
| 分类号: |
| 基金项目:温州市科技计划项目(H20090027) |
|
| Comparison of Iron-carbon microelectrolysis and Fenton oxidation on treatment of dyeing wastewater |
|
|
| Abstract: |
| 【Objective】Dyestuff wastewater is a typical kind of biorefractory wastewater with high concentration,high chroma,complicated components and low degradability.【Method】Dyeing wastewater from the Second Printing and Dyeing Mill of Xianyang,Shaanxi was chosen as experimental material to study the optimal conditions of for Iron-carbon microelectrolysis and Fenton oxidation using the single-factor experiments.The treatment effects of the two methods were compared as well.【Result】In disposing printing and dyeing waste water,optimum reaction conditions of Iron carbon microelectrolysis were as follows:exposure time was 30 min,pH value was 3-4,volume ratio of iron to carbon was 1,and chroma and COD removal efficiency were 80% and 60%,respectively.Optimum reaction conditions of Fenton oxidation were as follows:pH value was 3,exposure time was 45 minutes,the dosage of hydrogen peroxide was 20 mL/L and ferrous sulphate was 25 mL/L,the hydrogen peroxide was added in the reaction system three times,and chroma and COD removal efficiency were 79% and 80%,respectively.【Conclusion】Treatment of dyeing wastewater by Iron carbon microelectrolysis and Fenton oxidation showed good effects.It suggests that Iron carbon microelectrolysis can be used in combination with Fenton oxidation to improve the treatment efficiency. |
| Key words: dyeing wastewater Iron-carbon microelectrolysis Fenton oxidation chroma COD removal rate |
