DII, Department of Industrial Engineering, University of Padua, via Marzolo, 9-35131 Padova, Italy.
DII, Department of Industrial Engineering, University of Padua, via Marzolo, 9-35131 Padova, Italy.
Waste Manag. 2014 Mar;34(3):683-91. doi: 10.1016/j.wasman.2013.12.011. Epub 2014 Jan 9.
In situ aeration by means of the Airflow technology was proposed for landfill conditioning before landfill mining in the framework of a reclamation project in Northern Italy. A 1-year aeration project was carried out on part of the landfill with the objective of evaluating the effectiveness of the Airflow technology for landfill aerobization, the evolution of waste biological stability during aeration and the effects on leachate and biogas quality and emissions. The main outcomes of the 1-year aeration project are presented in the paper. The beneficial effect of the aeration on waste biological stability was clear (63% reduction of the respiration index); however, the effectiveness of aeration on the lower part of the landfill is questionable, due to the limited potential for air migration into the leachate saturated layers. During the 1-year in situ aeration project approx. 275 MgC were discharged from the landfill body with the extracted gas, corresponding to 4.6 gC/kgDM. However, due to the presence of anaerobic niches in the aerated landfill, approx. 46% of this amount was extracted as CH4, which is higher than reported in other aeration projects. The O2 conversion quota was lower than reported in other similar projects, mainly due to the higher air flow rates applied. The results obtained enabled valuable recommendations to be made for the subsequent application of the Airflow technology to the whole landfill.
在意大利北部的一个土地复垦项目框架内，提出了利用气流技术进行原位曝气，以对垃圾填埋场进行土地挖掘前的调节。在填埋场的一部分进行了为期 1 年的曝气项目，目的是评估气流技术对垃圾好氧化、曝气过程中废物生物稳定性的演变以及对渗滤液和沼气质量和排放的影响。本文介绍了为期 1 年的曝气项目的主要结果。曝气对废物生物稳定性的有益影响是明显的（呼吸指数降低了 63%）；然而，由于空气向渗滤液饱和层迁移的潜力有限，曝气对填埋场下部的有效性是值得怀疑的。在为期 1 年的原位曝气项目中，约有 275 MgC 从填埋体中随提取气体排出，相当于 4.6 gC/kgDM。然而，由于充气垃圾填埋场中存在厌氧小生境，约有 46%的气体以 CH4 的形式被提取，这高于其他曝气项目的报告值。O2 转化率低于其他类似项目的报告值，主要是由于应用了更高的空气流速。所获得的结果为随后将气流技术应用于整个垃圾填埋场提供了有价值的建议。
