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Treatment of landfill leachate by membrane processes of nanofiltration and reverse osmosis

机译：纳滤和反渗透膜工艺处理垃圾渗滤液

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摘要

Landfill leachate from Jakuevec, Zagreb, Croatia was treated by membrane processes of nanofiltration (NF) and reverse osmosis (RO). Different types of membranes were selected to obtain the parameters of leachate contaminants below maximum concentration levels (MCLs), defined by the Croatian law and EU directive. As a pretreatment of landfill leachate, coagulation and filtration were used. Parameters of total carbon, total organic carbon (TOC), inorganic carbon, chemical oxygen demand (COD), pH, turbidity, conductivity, concentration of different inorganic ions, heavy metals, etc., were analyzed in all steps. The landfill leachate was relatively low loaded with organic substances and ammonia; COD, TOC, and NH4+-N of real sample were 1,720.0mgOL(-1), 1,260.5mgCL(-1), and 1,147.6mgL(-1), respectively. Their concentrations decreased after coagulation for 27.9, 58.6, and 7.9%, respectively. RO/NF membranes (NF270, NF90, and XLE) additionally decreased COD and TOC for >94.6% and >92.5%, respectively. Ammonium ions decreased in the range of 37.1% (NF270)-88.9% (XLE).
机译：来自克罗地亚萨格勒布Jakuevec的垃圾渗滤液经过纳滤（NF）和反渗透（RO）膜工艺处理。选择不同类型的膜以获得渗滤液污染物的参数低于最大浓度水平（MCL），这是由克罗地亚法律和欧盟指令定义的。作为垃圾渗滤液的预处理，使用了混凝和过滤技术。在所有步骤中，分析了总碳，总有机碳（TOC），无机碳，化学需氧量（COD），pH，浊度，电导率，不同无机离子的浓度，重金属等参数。垃圾填埋场渗滤液中有机物和氨的含量相对较低；实际样品的COD，TOC和NH4 + -N分别为1,720.0mgOL（-1），1,260.5mgCL（-1）和1,147.6mgL（-1）。凝固后它们的浓度分别降低了27.9％，58.6％和7.9％。 RO / NF膜（NF270，NF90和XLE）分别将COD和TOC降低了> 94.6％和> 92.5％。铵离子下降范围为37.1％（NF270）-88.9％（XLE）。

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