Matthews Richard, Winson Michael, Scullion John
Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Ceredigion, Wales, SY23 3DA, UK.
Sci Total Environ. 2009 Apr 1;407(8):2557-64. doi: 10.1016/j.scitotenv.2009.01.034. Epub 2009 Feb 13.
Biological ammoniacal-nitrogen (NH(4)(+)-N) and organic carbon (TOC) treatment was investigated in replicated mesoscale attached microbial film trickling filters, treating strong and weak strength landfill leachates in batch mode at temperatures of 3, 10, 15 and 30 degrees C. Comparing leachates, rates of NH(4)(+)-N reduction (0.126-0.159 g m(-2) d(-1)) were predominantly unaffected by leachate characteristics; there were significant differences in TOC rates (0.072-0.194 g m(-2) d(-1)) but no trend relating to leachate strength. Rates of total oxidised nitrogen (TON) accumulation (0.012-0.144 g m(-2) d(-1)) were slower for strong leachates. Comparing temperatures, treatment rates varied between 0.029-0.319 g NH(4)(+)-N m(-2) d(-1) and 0.033-0.251 g C m(-2) d(-1) generally increasing with rising temperatures; rates at 3 degrees C were 9 and 13% of those at 30 degrees C for NH(4)(+)-N and TOC respectively. For the weak leachates (NH(4)(+)-N<140 mg l(-1)) complete oxidation of NH(4)(+)-N was achieved. For the strong leachates (NH(4)(+)-N 883-1150 mg l(-1)) a biphasic treatment response resulted in NH(4)(+)-N removal efficiencies of between 68 and 88% and for one leachate no direct transformation of NH(4)(+)-N to TON in bulk leachate. The temporal decoupling of NH(4)(+)-N oxidation and TON accumulation in this leachate could not be fully explained by denitrification, volatilisation or anammox, suggesting temporary storage of N within the treatment system. This study demonstrates that passive aeration trickling filters can treat well-buffered high NH(4)(+)-N strength landfill leachates under a range of temperatures and that leachate strength has no effect on initial NH(4)(+)-N treatment rates. Whether this approach is a practicable option depends on a range of site specific factors.
在重复的中尺度附着微生物膜滴滤池中研究了生物氨氮（NH₄⁺-N）和有机碳（TOC）的处理情况，以间歇模式在3、10、15和30摄氏度下处理强浓度和弱浓度的垃圾渗滤液。比较渗滤液发现，NH₄⁺-N的还原速率（0.126 - 0.159 g m⁻² d⁻¹）主要不受渗滤液特性的影响；TOC速率存在显著差异（0.072 - 0.194 g m⁻² d⁻¹），但与渗滤液强度无关。强渗滤液中总氧化氮（TON）的积累速率（0.012 - 0.144 g m⁻² d⁻¹）较慢。比较不同温度，处理速率在0.029 - 0.319 g NH₄⁺-N m⁻² d⁻¹和0.033 - 0.251 g C m⁻² d⁻¹之间变化，总体上随温度升高而增加；3摄氏度时NH₄⁺-N和TOC的速率分别是30摄氏度时的9%和13%。对于弱渗滤液（NH₄⁺-N < 140 mg l⁻¹），实现了NH₄⁺-N的完全氧化。对于强渗滤液（NH₄⁺-N 883 - 1150 mg l⁻¹），双相处理反应导致NH₄⁺-N的去除效率在68%至88%之间，并且对于一种渗滤液，在大量渗滤液中NH₄⁺-N没有直接转化为TON。这种渗滤液中NH₄⁺-N氧化和TON积累的时间解耦不能通过反硝化、挥发或厌氧氨氧化完全解释，表明氮在处理系统中存在临时储存。本研究表明，被动曝气滴滤池可以在一系列温度下处理缓冲良好的高NH₄⁺-N强度垃圾渗滤液，并且渗滤液强度对初始NH₄⁺-N处理速率没有影响。这种方法是否是一个可行的选择取决于一系列特定场地因素。
