摘要
[目的]研究化学混凝沉淀-吹脱-Fenton氧化法对垃圾渗滤液膜滤浓缩液的处理效果。[方法]以上海某填埋场生活垃圾渗滤液膜滤浓缩液为研究对象,研究混凝沉淀-吹脱-Fenton氧化协同处理工艺对有机物和NH3-N的去除,考察混凝剂种类、投加量、吹脱温度、空气流量、吹脱pH和H2O2浓度、Fe2+浓度、氧化pH和时间等因素的影响。[结果]混凝沉淀中,添加6 g/L MgO和2 g/L Ca(OH)2混凝沉淀效果最佳。最佳吹脱试验条件确定为pH 11.0～11.5,温度≥30℃,吹脱时间为4.5～5.0 h,空气流量为6 L/(min.L),吹脱效率大于80%。Fenton氧化的最优化条件为H2O2 750 mmol/L,Fe2+28 mmol/L,反应时间45 min,pH 3。整个工艺对COD去除率达93.4%,对NH3-N去除率达95.7%。[结论]化学混凝沉淀-吹脱-Fenton氧化法对垃圾渗滤液膜滤浓缩液的处理效果较好,值得进一步研究。
[Objective]The research aimed to study the control of concentrated leachate with method of coagulation,ammonia stripping and Fenton oxidation processes.[Method]A treatment process for the concentrated landfill leachate from a reverse osmosis equipment using coagulation,ammonia stripping and Fenton oxidation was developed.The effects of the composite coagulants,ammonia stripping temperature,pH,quantity of flow air,H2O2 and Fe2＋ concentrations on COD and NH3-N removals were investigated.[Result]The results showed that the optimum efficiency of coagulation and ammonia stripping could be achieved under the profiles of 6 g/L MgO and 2 g/L Ca（OH）2 by agitating for 24 h followed by blowing air at the speed of 6 L/（min·L） for 4.5-5.0 h at pH of 11.0-11.5.The optimistic conditions of orthogonal tests were H2O2 concentration 750 mmol/L,Fe2＋ concentration 28 mmol/L,reaction time 45 min,pH 3.COD and NH3-N removal rates were 93.4% and 95.7% through the whole process.[Conclusion]This research indicated that the control of concentrated leachate with method of coagulation,ammonia stripping and Fenton oxidation processes was ideal and should be studied for next step.
出处
《安徽农业科学》
CAS
北大核心
2011年第31期19325-19327,共3页
Journal of Anhui Agricultural Sciences
基金
上海市科委2010年重大专项子课题(10DZ1200109)
