摘要
针对某难处理高浓度乳化液废水,提出了隔油–破乳–Fenton氧化–混凝联合处理工艺.试验结果表明:乳化液废水静浮20 min除去上层浮油,在废水pH值8.0,PAC投加量8.0 g/L,0.1‰PAM投加量10 mL/L的条件下破乳效果较好.废水继续通过Fenton试剂氧化及混凝沉降处理,当Fenton氧化初始pH值3.5,H2O2(30%)投加量12 mL/L,[H2O2]/[Fe2+]=4∶1,一次性投加FeSO4·7H2O,反应时间45 min及混凝沉降pH值8.0,混凝剂投加量0.3 g/L时,处理效果令人满意.采用该工艺处理高浓度乳化液废水,其COD去除率为99.91%,浊度去除率为98.96%,石油类去除率为99.97%,处理后水质达到《污水综合排放标准》(GB8978-1996)二级标准.
Aiming at the difficulty in treating high-strength emulsified wastewater, the paper puts forward the process of oil separation-demulsification-Fenton oxidation-coagulation. The experimental results showed that Emulsion wastewater removes the floating oil after 20 minutes with pH 8.0 of the wastewater; the demulsification effect is better when the PAC dosage is 8 .0 g/L, and 0.1%0 PAM 10 mL/L. The wastewater continue to receive the Fenton reagent oxidation and coagulation sedimentation treatment. When the initial pH of Fenton oxidation is 3.5, the dosage of H202 （30 %） is 12 mL/L, [H202]/[Fe2＋]=4：l, dose FeSO4·7H20 with the reaction time of 45 minutes and coagulation sedimentation pH is 8.0. When coagulant dosage is 0.3 g/L, the effect is satisfactory. The process for treating the high concentrated wastewater, the COD removal rate is 99.91%, turbidity removal rate 98.96 %, and oil removal rate 99.97 %. The quality of treated water reaches Class B of Integrated Wastewater Discharge Standard （GB8978-1996）.
出处
《江西理工大学学报》
CAS
2014年第3期18-22,28,共6页
Journal of Jiangxi University of Science and Technology
基金
昆明市危险废物处理处置中心重点攻关项目(201303)
关键词
隔油
破乳
FENTON氧化
混凝沉降
乳化液废水
oil separation
demulsification
Fenton oxidation
coagulation sedimentation
emulsified wastewater
