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DETERMINING GAC BED LIFE

机译:确定GAC床的寿命

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摘要

This study developed a way to rapidly and effectively evaluate the remaining life of a granular activated carbon (GAC) bed used to mitigate taste and odor episodes. The maximum attenuation of a 2-methylisoborneol (MIB) episode, a representative taste and odor compound, can rapidly be determined using laboratory-scale columns packed with partially spent GAC taken from full-scale operating adsorbers. These laboratory-scale columns closely simulated the performance of pilot-scale operating adsorbers. These laboratory-scale columns closely simulated the performance of pilot-scale columns clsely simulated the performance of pilot-scale columns. The percent of a transient MIB load removed by GAC did not depend on the influent MIB concentration but did depend on the amount of natural organic matter adsorbed on the GAC surface. This approach can be used to determine GAC's potential percentage removal of taste-and odor-causing compounds as a function of GAC service time. It allows GAC to be tested to estimate its readiness for summer taste and odor episodes. Adsorption alone in GAC adsorbers that used <10 min of empty bed contact time was insufficient to fully protect against typical MIB episodes.
机译:这项研究开发了一种方法,可以快速有效地评估用于减轻味觉和气味发作的颗粒状活性炭(GAC)床的剩余寿命。 2-甲基异冰片醇(MIB)事件(一种代表性的味道和气味化合物)的最大衰减可以使用装有从满量程操作吸附器中取出的部分用过的GAC的实验室规模的色谱柱快速确定。这些实验室规模的色谱柱密切模拟了中试规模的吸附器的性能。这些实验室规模的色谱柱密切模拟了中试规模的色谱柱的性能,而模拟了中试规模的色谱柱的性能。由GAC去除的瞬时MIB负载的百分比不取决于进水的MIB浓度,而是取决于吸附在GAC表面的天然有机物的量。该方法可用于确定GAC消除潜在的引起味道和气味的化合物的百分比与GAC使用时间的关系。它可以对GAC进行测试,以评估其对夏季味道和气味发作的准备情况。在空床接触时间少于10分钟的GAC吸附器中,单独吸附不足以完全防止典型的MIB发作。

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