Abstract:

The experimental research on the pretreatment of coking wastewater by electro-catalytic oxidation process has been carried out. Taking COD,SCN^- and volatile phenol as objects to be investigated,under different current density and initial pH,the wastewater is pretreated. The degradation effects of COD,SCN^- and volatile phenol,by electro-catalytic oxidation process,with higher current density and acidic conditions,is better. The biodegradation rate of the treated effluent is investigated and its efficiency evaluation is accomplished. The best conditions for the pretreatment of coking wastewater by electro-catalytic oxidation process are current density 2.03×10^-2 A/cm² and pH<7 which are good for the subsequent biochemical treatment.

Key words: coking wastewater, electro-catalytic oxidation, pretreatment, efficiency evaluation

摘要：

对电催化氧化法预处理焦化废水进行了实验研究。以COD、SCN^- 和挥发酚作为考察目标，在不同电流密度及初始pH条件下对废水进行预处理，较大的电流密度及酸性条件下电催化氧化法对COD、SCN^- 、挥发酚的降解效果较好。考察了预处理后出水的生物降解速率并进行效能评价，得出电催化氧化预处理焦化废水时电流密度为2.03×10^-2 A/cm²、pH<7为最佳工况，有利于后续生化处理的进行。

关键词: 焦化废水, 电催化氧化, 预处理, 效能评价

CLC Number: 

• X703