摘要：

针对制浆造纸废水二级生化处理难以实现达标排放的问题，对比研究了混凝法、Fenton氧化法及混凝-Fenton氧化法作为深度处理技术对其二级生化出水的处理效果，并分析了污泥产量和经济性。结果表明：混凝-Fenton氧化法是较适用于制浆造纸生化出水深度处理的技术，其预处理混凝阶段投加350 mg/L的Al₂（SO₄）₃和0.5 mg/L的阳离子聚丙烯酰胺，并根据混凝出水COD按n（H₂O₂）：n（COD）：n（FeSO₄）=2：1：1投加H₂O₂和FeSO₄，处理后出水可满足国家排放标准的要求。混凝-Fenton氧化法的污泥产量约为0.85 g/L。

关键词: 制浆造纸废水, 深度处理, 混凝, Fenton氧化, 污泥产量

Abstract:

Aiming at the problems that it is difficult to reach the discharge standard for pulp and paper wastewater treatment by secondary biological processes,the treatment effects of coagulation,Fenton oxidation,and coagulation-Fenton oxidation methods on the secondary biochemical effluent are contrasted and researched,and the sludge output and its economic efficiency analyzed. The results indicate that coagulation-Fenton oxidation method is comparatively suitable for the advanced treatment technology of pulp and paper secondary biological effluent. 350 mg/L of Al₂(SO₄)₃ and 0.5 mg/L of cationic polyacrylamide(CPAM)are added in its pretreatment coagulation stage,and according to the coagulation effluent COD,H₂O₂ and FeSO₄ are added,and the ratio of them is n(H₂O₂):n(COD):n(FeSO₄)=2:1:1. The treated effluent can meet the requirements for the state discharge standard. The sludge output of coagulation-Fenton process is about 0.85 g/L.

Key words: pulp and paper wastewater, advanced treatment, coagulation, Fenton oxidation, sludge output

中图分类号: 

• X793

• X703.1