混凝沉淀-高级氧化联合处理垃圾转运站污水的实验研究

Experimental study of transfer station wastewater treatment by coagulation and sedimentation-advanced oxidation

城市生活垃圾转运站污水具有水质水量变化大、有机污染负荷高、具有强烈恶臭、色度高等显著特点,已成为城市重要的点源污染。为有效消减转运站污水有机负荷,探讨了混凝沉淀-高级氧化联合使用的物化处理方法,考察了联合处理过程中双氧水/亚铁、亚铁投加量、酸化后pH值、混凝剂投加量、中和后pH值等因素对处理效果的影响。小试研究结果表明,在混凝剂投加400 mg/L,亚铁0.06 mol/L,酸化后pH为3,双氧水/亚铁=4∶1,中和后pH为7.5的条件下,污水COD消减量达到60%以上,色度去除率98%,恶臭基本消除。

Wastewater generated from municipal solid waste（MSW） transfer stations,with severe variety of quality and quantity and high concentration of organic pollutant,odor and color,has already become hot point in the study of source pollution control of water bodies.Coagulation and sedimentation-advanced oxidation method is studied to reduce organic load of wastewater from transfer stations.Effects of H2O2/Fe^2＋,dosage of Fe^2＋ and coagulant,pH after adding acid and alkali were analyzed.With coagulant dosage at 400 mg/L,0.06 mol/L of Fe^2＋,pH after adding acid was 3,H2O2/ Fe^2＋=4∶1,pH after adding alkali was 7.5,COD removal efficiency was above 60%.Color removal was about 98%,odor was almost completely eliminated.