强化混凝沉淀法处理生活垃圾渗滤液实验研究  

Experimental Study on Treatment of Domestic Waste Leachate by Intensive Coagulation and Sedimentation Method

作　　者：李国浩 LI Guohao(Zhaoqing Gaoyao District Open University,Zhaoqing Guangdong 526100,China)

机构地区：[1]肇庆市高要区开放大学,广东肇庆526100

出　　处：《当代化工》2024年第3期530-534,共5页Contemporary Chemical Industry

基　　金：国家自然科学基金(No.51378129)。

摘　　要：采用Fenton和絮凝处理的结合方式处理广东垃圾填埋场的滤液。实验采用不同的Fenton处理条件,包括pH值、H_(2)O_(2)/Fe(Ⅱ)比例和用量以及反应时间,以确定最佳的处理条件。在最佳Fenton处理条件下,COD去除效率约为80%,进水质量浓度为624±80 mg·L^(-1),符合QCVN 25:2009/BTNMT的要求。同时去除了75%的色度、25%的氨和12%的悬浮物,为下一阶段的絮凝处理创造了有利条件。在絮凝方面,研究使用CaO和聚合氯化铝(PAC)顺序处理滤液。经过Ca O(6 g·L^(-1),180 min)、PAC(1 500 mg·L^(-1))和A101(2 mg·L^(-1))处理后,COD、色度、氨和悬浮物的去除率分别达到85%、99%、99%~99.5%和88%,出水可满足排放标准,毒性分析表明Fenton处理降低了垃圾填埋场渗滤液的毒性。The combination of Fenton and flocculation treatment was used to treat the filtrate from a landfill in Guangdong.Different Fenton treatment conditions,including pH,H_(2)O_(2)/Fe(Ⅱ)ratio and dosage,and reaction time,were used to determine the optimal treatment process.Under the optimal Fenton treatment conditions,the COD removal rate was about 80%,and the influent mass concentration was 624±80 mg·L^(-1),which met the requirements of QCVN 25:2009/BTNMT.Meanwhile,75%of the color,25%of the ammonia and 12%of the suspended matter were removed,creating favorable conditions for the next stage of flocculation treatment.For flocculation,CaO and polymeric aluminum chloride(PAC)were used to sequentially treat the filtrate.After treatment with CaO(6 g·L^(-1)and 180 min),PAC(1500 mg·L^(-1))and A101(2 mg·L^(-1)),the removal rates of COD,color,ammonia and suspended matter reached 85%,99%,99%~99.5%and 88%,respectively,and the effluent could meet the treatment requirements of the discharge standard,and the toxicity analysis showed that both Fenton treatment reduced the toxicity of landfill leachate.

关 键 词：FENTON 絮凝 污水处理 渗滤液 

分 类 号：TD923.3[矿业工程—选矿]