Liu C H, Lo K V
Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, Canada.
J Environ Sci Health B. 2001 Sep;36(5):667-75. doi: 10.1081/PFC-100106193.
Bench-scale packed zeolite columns were set up and operated to investigate the continuous removal of ammonium ions from compost leachate. The effects of hydraulic retention time (HRT), and particle size of the zeolite on the ammonia adsorption capacity were studied. For both the coarse particle and the powdered zeolite columns, higher ammonia removal efficiencies were achieved with longer HRT (i.e., lower influent flow rate) tests. At the same HRT, ammonia removal efficiencies from tests with powdered zeolite were generally 20% higher than tests with the coarse particle zeolite. A HRT of 6 hours was found appropriate for efficient ammonia removal, and an operating capacity of 1.31 mg N/g zeolite was obtained. Over 98% of the ammonia input from the influent was consistently removed for over 5 bed volumes (BV) of compost leachate flowing through the zeolite column. Zeolite proved to have a great potential as a medium for ammonia removal in treating composting leachate.
搭建了实验室规模的填充沸石柱并进行运行，以研究从堆肥渗滤液中连续去除铵离子的情况。研究了水力停留时间（HRT）和沸石粒径对氨吸附容量的影响。对于粗颗粒沸石柱和粉末状沸石柱，在水力停留时间更长（即进水流量更低）的试验中，实现了更高的氨去除效率。在相同的水力停留时间下，粉末状沸石试验的氨去除效率通常比粗颗粒沸石试验高20%。发现6小时的水力停留时间适合高效去除氨，并且获得了1.31 mg N/g沸石的运行容量。对于流经沸石柱的超过5个床体积（BV）的堆肥渗滤液，进水氨输入的98%以上始终被去除。事实证明，沸石作为处理堆肥渗滤液中氨去除的介质具有巨大潜力。
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