Evaluation of treatment and recovery of leachate by bipolar membrane electrodialysis process
Evaluation of treatment and recovery of leachate by bipolar membrane electrodialysis process
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DOI：
10.1016/j.cep.2013.11.005
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发表时间：
2014-01-01
影响因子：
4.3
通讯作者：
Gonullu, M. T.
中科院分区：
文献类型：
--
作者：
Ilhan, F.;Kabuk, H. A.;Gonullu, M. T.
经常对电渗析(ED)过程进行恢复研究。在这项研究中，除了检查电渗析过程中渗滤液成分的回收外，还同时测试了该过程处理含渗滤液废水的使用情况。首先对渗滤液进行预处理(超滤+阳离子交换)，以防止堵塞和对双极电渗析膜的有害影响。在实验研究结束时，确定了最佳操作条件。电渗析过程中的在线观察包括反应时间、电导率以及收集去除离子的阳极液和阴极液中H+和OH-离子的摩尔浓度的变化。渗滤液中最重要的污染物是有机物和含氮化合物。为此，还监测了电渗析出水中有机物质的表示，如化学需氧量(COD)，以及含氮化合物，如总Kheldahl氮(TKN)和氨氮(NH3-N)。在最佳运行条件下，出水NH3-N、TKN和COD的平均去除率分别为96.2%、92.8%和86.7%。研究结束时测得电导值为1.97ms/cm。(C)2013爱思唯尔B.V.保留所有权利。
Recovery studies are frequently carried out for electrodialysis (ED) processes. In this study, beyond examining the recovery of leachate components in an electrodialysis process, the use of that process to treat leachate-containing wastewater was simultaneously tested. Leachates were initially pre-treated (ultra filtration + cation exchange) to prevent clogging' and harmful effect to the bipolar electrodialysis membranes. Optimum operating conditions were determined at the end of the experimental studies. Online observations during the electrodialysis process included the temperature-dependent reaction time, conductivity and changes of molar concentrations of H+ and OH- ions in both the anolyte and catholyte compartments in which removed ions were collected. The most important contaminants in leachates are organic substances and nitrogen compounds. For this reason, representations of organic substances, such as the chemical oxygen demand (COD), and nitrogenous compounds, such as total Kheldahl nitrogen (TKN) and ammonia-nitrogen (NH3-N), were also monitored in the electrodialysis effluent. Under the optimum operating conditions, removal of NH3-N, TKN and COD were determined in the effluent at 96.2%, 92.8% and 86.7%, respectively. The conductivity value was determined to be 1.97 mS/cm at the end of the study. (C) 2013 Elsevier B.V. All rights reserved.