聚铁混凝-Fenton法-SBR工艺对成熟垃圾场渗滤液深度处理的研究 |
摘要点击 3759 全文点击 2400 修订日期:2007-11-15 |
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中文关键词 聚铁 混凝 Fenton试剂 SBR 垃圾渗滤液 深度处理 |
英文关键词 polymeric ferric sulfate coagulation Fenton reagent sequence batch reactor landfill leachate deep treatment |
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中文摘要 |
联合运用聚铁混凝、Fenton方法以及SBR生物法3种工艺对老龄垃圾场的渗滤液进行深度处理.在综合考虑出水符合垃圾渗滤液国家一级排放标准以及运行成本经济性的前提下,在进水主要污染物COD为640 mg·L-1 、色度为500的条件下,推荐了聚铁混凝反应及Fenton反应的最优条件:聚铁加药量为0.45 mL·L-1, Fe2+] 投加量为0.006 mol·L-1,[H2O2]投加量为0.006 mol·L-1 ,反应时间4 h,Na2CO3投加量约为0.7 g·L-1 ,0.1% PAM投加量为2 mL·L-1,出水COD为68 mg·L-1,BOD为20 mg·L-1.同时研究证明,在Fenton方法之前使用聚铁混凝法具有大幅度降低成本、省却pH调节步骤的优点.聚铁混凝反应及Fenton反应总药剂成本低于3.2 元/t,实用价值高.Fenton反应后使用SBR生物法处理,其出水水质:COD≤80 mg·L-1,BOD≤8 mg·L-1,NH+/sup>4-N≤3 mg·L-1,色度≤5倍,SS≤10 mg·L-1,符合垃圾渗滤液国家一级排放标准. |
英文摘要 |
The method of Fenton oxidation cooperated with PFS coagulation and SBR for deep treating aged landfill leachate was investigated. The deep treatment based on the effluent need reach the landfill leachate national discharge standard Ⅰ, and lower operating costs. Under the influent condition of COD concentration 640 mg·L-1and chroma 500, the optimal reaction conditions of Fenton oxidation cooperated with PFS coagulation were recommended. Operating at the dosage of PFS=0.45 mL·L-1, the dosage of [Fe2+] =0.006 mol·L-1, the dosage of [H2O2]= 0.006 mol·L-1, reaction time 4 h, the dosage of Na2CO3 =0.7 g·L-1, the dosage of 0.1% PAM=2mL·L-1. After this technics, the effluent COD concentration 68mg·L-1,chroma reached 2, SS concentration 10 mg·L-1, BOD concentration 20 mg·L-1. Besides, using PFS coagulation before the Fenton oxidation has the advantage of decreasing costs and canceling pH accommodation. All reagents costs of the PFS coagulation and the Fenton oxidation is ¥3.2 per ton. The effluent quality of SBR after the advanced oxidation: COD≤ 80 mg·L-1, BOD≤8 mg·L-1,NH+4-N≤3 mg·L-1,chroma≤5, SS≤10 mg·L-1,the final results reach the landfill leachate national discharge standard Ⅰ (GB16889-1997). |
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