Gálvez A, Zamorano M, Hontoria E, Ramos A
Department of Civil Engineering, University of Granada, Campus Fuentenueva 18071 Granada, Spain.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2006;41(6):1129-44. doi: 10.1080/10934520600623034.
A submerged biological filter packed with clayey schists from brick industrial waste as support material was used to treat landfill leachate. The pilot-scale plant consisted of two separated reactors, running in aerated and non-aerated conditions respectively. The leachate was taken from a landfill in Granada (southeast Spain) and was considered as partially stabilized with average chemical oxygen demand (COD) concentrations of 18,683.3 mg COD/L. The efficiency of the system at reducing COD, biological oxygen demand (BOD(5)), total suspended solids (TSS), total volatile solids (TVS), total solids (TS), cations and anions concentrations was tested comparing aerating and non-aerating conditions under several volumic organic loadings (15.7, 25.1 and 31.1 kg COD/m(3)d), a hydraulic loading of 0.7 m(3)/m(2)d and an internal recirculation of 250%. Results obtained showed that the aerated reactor was more effective than the non-aerated reactor in the removal of COD, BOD5 and TS, with maximum efficiencies of 66.7%, 91.2% and 21.7%, respectively. The volumic organic loading of 25.1 COD/m(3)d obtained best results. However, for the removal of TSS and TVS the non-aerated reactor showed better results (42%). The behaviour of different cations (Na(+), K(+), and Mg(2+)) and anions (F(-), Cl(-), Br(-)) was also monitored and a reduction in their concentration in the effluent was detected, in the order of 61% for Ca(2+) and 100% for F(-).
使用填充有砖工业废料中黏土片岩作为支撑材料的淹没式生物滤池来处理垃圾渗滤液。中试规模的装置由两个分开的反应器组成，分别在曝气和非曝气条件下运行。渗滤液取自西班牙东南部格拉纳达的一个垃圾填埋场，被认为是部分稳定的，平均化学需氧量（COD）浓度为18,683.3 mg COD/L。在几种体积有机负荷（15.7、25.1和31.1 kg COD/m³·d）、水力负荷0.7 m³/m²·d和内部循环率250%的条件下，比较曝气和非曝气条件，测试了该系统在降低COD、生化需氧量（BOD₅）、总悬浮固体（TSS）、总挥发性固体（TVS）、总固体（TS）、阳离子和阴离子浓度方面的效率。获得的结果表明，曝气反应器在去除COD、BOD₅和TS方面比非曝气反应器更有效，最大效率分别为66.7%、91.2%和21.7%。25.1 COD/m³·d的体积有机负荷取得了最佳结果。然而，对于去除TSS和TVS，非曝气反应器显示出更好的结果（42%）。还监测了不同阳离子（Na⁺⁺、K⁺和Mg²⁺）和阴离子（F⁻、Cl⁻、Br⁻）的行为，检测到它们在流出物中的浓度降低，Ca²⁺的降低幅度为61%，F⁻的降低幅度为100%。
