使用沸石去除堆肥渗滤液中的氨。III. 沸石柱的再生
Ammonia removal from compost leachate using zeolite. III. Regeneration of zeolite columns.
作者信息
Liu C H, Lo K V
机构信息
Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, Canada.
出版信息
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2001;36(10):1825-43. doi: 10.1081/ese-100107432.
The effects of hydraulic reteneration time (HRT), and the strength of the regenerating solution on the ammonia adsorption capacity and the zeolite regeneration were studied using bench-scale packed zeolite columns. A 0.6 M NaCl solution fed at a HRT of I h was preferred for the regeneration process, and more than 95% of adsorbed ammonium ions were recovered after using 7-8 bed volumes (BV) of the regenerating solution. The adsorption-regeneration time ratio was approximately 5:1. High concentration of potassium ions in the composting leachate competed with NH4+ ions for the exchange sites, resulting in a reduction in the efficiencies of ammonia removal and zeolite column regeneration. However, Zeolite still proved to have a great potential as a medium for ammonia removal in treating composting leachate.
使用实验室规模的填充沸石柱，研究了水力再生时间（HRT）和再生溶液强度对氨吸附容量和沸石再生的影响。对于再生过程，优选以1小时的HRT进料的0.6M NaCl溶液，并且在使用7 - 8床体积（BV）的再生溶液后，回收了超过95％的吸附铵离子。吸附 - 再生时间比约为5：1。堆肥渗滤液中高浓度的钾离子与NH4 +离子竞争交换位点，导致氨去除效率和沸石柱再生效率降低。然而，沸石仍然被证明在处理堆肥渗滤液中作为氨去除介质具有巨大潜力。
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