摘要：

采用US/Fenton氧化—混凝法对高浓度焦化废水进行预处理。考察了对处理效果的影响因素，确定了最适工艺条件。结果表明，在超声波功率500 W，H₂O₂投加质量浓度为6.0 g/L，Fe²⁺为400 mg/L，pH 3，Al₂(SO₄)₃、PAM投加量分别为480、4.0 mg/L的条件下，COD、NH₃-N、CN-和色度的去除率分别达75.1%、53.4%、62.8%和83.1%，废水的COD由处理前的4 799 mg/L降至1 195 mg/L，BOD/COD由0.196提高到0.373，出水可生化性良好。US/Fenton氧化—混凝法可作为高浓度焦化废水的一种有效的预处理方法。

关键词: 超声波, Fenton试剂, 焦化废水, 氧化

Abstract:

US/Fenton oxidation-coagulation process has been employed to pretreat highly concentrated coking wastewater. The effect of H₂O₂ concentration, Fe ²⁺ dosage, pH, oxidation reaction time, Al₂(SO₄₃ and PAMdosage on the treatment efficiency are investigated. The optimum process conditions are determined. The results showthat when the US power is 500 W, H₂O₂ concentration is 6.0 g/L, Fe²⁺ dosage is 400 mg/L, pH is 3, Al₂(SO₄)₃ dosage is 480 mg/Land PAM concentration is 4.0 mg/L, the removal efficiency of COD, NH₃-N, CN and chroma are 75.1%, 53.4%, 62.8%and83.1%, respectively. CODdecreasesfrom4 799 mg/Lto1 195 mg/L, and BOD/CODratioincreases from 0.196 to 0.373 altogether. The effluent from US/Fenton oxidation-coagulation process can be disposed by biological treatment. US/Fenton oxidation-coagulation process is a valid pretreatment method for highly concentrated coking wastewater.

Key words: ultrasound, Fenton reagent, coking wastewater, oxidation

中图分类号: 

• X703.1