Graduate School of Engineering, Kyushu University, Japan.
Waste Manag. 2014 Jan;34(1):101-11. doi: 10.1016/j.wasman.2013.10.015. Epub 2013 Nov 9.
As far as the optimal design, operation, and field application of the Aerobic-Anaerobic Landfill Method (AALM) are concerned, it is very important to understand how aeration modes (different combinations of aeration depth and air injection rate) affect the biodegradation of organic carbon and the transformation of nitrogen in landfill solid waste. Pilot-scale lysimeter experiments were carried out under different aeration modes to obtain detailed information regarding the influence of aeration modes on leachate characteristics. Results from these lysimeter experiments revealed that aeration at the bottom layer was the most effective for decomposition of organic carbon when compared with aeration at the surface or middle layers. Moreover, the air injection rate led to different nitrogen transformation patterns, unlike the lesser influence it has on organic carbon decomposition. Effective simultaneous nitrification and denitrification were observed for the aeration mode with a higher air injection rate (=1.0 L/min). On the other hand, the phenomenon of sequenced nitrification and denitrification could be observed when a low air injection rate (=0.5L/min.) was employed. Finally, it is concluded that, for AALM, air injection with a higher air injection rate at the deepest layer near the leachate collection pipe tends to accelerate the stabilization of landfill waste as defined in terms of the enhancement of denitrification as well as organic carbon decomposition.
就好氧-厌氧填埋法（AALM）的优化设计、运行和现场应用而言，了解曝气方式（曝气深度和空气注入率的不同组合）如何影响有机碳的生物降解和填埋固体废物中氮的转化非常重要。进行了不同曝气方式下的中试规模淋滤池实验，以获得有关曝气方式对渗滤液特性影响的详细信息。这些淋滤池实验的结果表明，与表面或中层曝气相比，底层曝气最有利于有机碳的分解。此外，空气注入率导致不同的氮转化模式，与对有机碳分解的影响较小不同。对于空气注入率较高（=1.0 L/min）的曝气方式，观察到有效的同步硝化反硝化。另一方面，当使用较低的空气注入率（=0.5 L/min）时，可以观察到序批式硝化反硝化现象。最后得出结论，对于 AALM，在靠近渗滤液收集管的最深处以较高的空气注入率注入空气，往往会通过增强反硝化以及有机碳分解来加速填埋废物的稳定。
