Abstract:

The treatment of paper mill wastewater by flocculation and electro-oxidation reactor has been studied. Paper mill wastewater istreated by flocculation firstly. When PAC 120mg/L is added to the wastewater and then PAM1.0mg/L, the removal rate of COD_Cr is about 75%. The effluent istreated by electro-oxidation reactor, which reaction is at the first grade. When current density is 15 mA/cm², and reacting time is 140 min, the excess COD_Cr is removed above 90%, and the biodegradability is improved simultaneously. Flocculation and electro-oxidation reactor have high removal rates of COD_Cr, SS and chromaticity. They have high efficiency result, and the quality of effluent is stable. Flocculation and electro-oxidation reactor fit to the treatment of paper mill wastewater.

Key words: paper mill wastewater, flocculation, electro-oxidation reactor, biodegradability

摘要：

研究了采用混凝沉淀+电氧化反应器联合处理造纸废水工艺。首先对造纸废水进行混凝沉淀，先投加聚合氯化铝（PAC）120mg/L，再投加聚丙烯酰胺（PAM）1.0mg/L，对废水的COD_Cr去除率可达到75%。出水再利用电氧化反应器处理，电氧化反应器反应级数为一级，当电流密度15 mA/cm²、反应时间140 min时，对废水的COD_Cr的再次去除率可达90%以上，并可提高废水的可生化性。采用混凝沉淀与电氧化反应器联合处理造纸废水，处理效果好，出水稳定，对废水中COD_Cr、悬浮物、色度均有很高的去除效率，是造纸废水适宜的处理技术。

关键词: 造纸废水, 混凝, 电氧化反应器, 可生化性

CLC Number: 

• X703.1