Environmental Engineering Group, Department of Science and Techniques of Water and the Environment, University of Cantabria, Avd. Los Castros s/n, Santander 39005, Cantabria, Spain.
Waste Manag. 2014 Aug;34(8):1446-54. doi: 10.1016/j.wasman.2014.04.004. Epub 2014 May 10.
A field study was developed in a new landfill for refuse from construction and demolition (C&D) material recovery plants of small size (4 Ha.) in Europe, with the aim of evaluating the liquid and gas emissions in this type of facility at a large scale. It included characterization of the materials, monitoring leachate and gas quantity and composition. Besides thermometers, piezometers and sampling ports were placed in several points within the waste. This paper presents the data obtained for five years of the landfill life. The materials disposed were mainly made up of wood and concrete, similar to other C&D debris sites, but the amount of gypsum drywall (below 3% of the waste) was significantly smaller than other available studies, where percentages above 20% had been reported. Leachate contained typical C&D pollutants, such as different inorganic ions and metals, some of which exceeded other values reported in the literature (conductivity, ammonium, lead and arsenic). The small net precipitation in the area and the leachate recirculation into the landfill surface help explain these higher concentrations, thus highlighting the impact of liquid to solid (L/S) ratio on leachate characteristics. In contrast to previous studies, neither odor nuisances nor significant landfill gas over the surface were detected. However, gas samples taken from the landfill inside revealed sulfate reducing and methanogenic activity.
在欧洲，一个新的小型（4 公顷）建筑和拆除（C&D）材料回收厂的垃圾填埋场进行了一项实地研究，目的是评估这种设施的大规模液体和气体排放。该研究包括对材料进行特性描述，监测浸出液和气体的数量和成分。除了温度计，还在废物中的几个点设置了测压计和采样口。本文介绍了填埋场运行五年的数据。所处理的材料主要由木材和混凝土组成，与其他 C&D 碎片场地相似，但石膏墙板（占废物的 3%以下）的数量明显小于其他可用研究中的数量，其他研究中报告的百分比超过 20%。浸出液中含有典型的 C&D 污染物，如不同的无机离子和金属，其中一些超过了文献中报告的其他值（电导率、铵、铅和砷）。该地区的净降水量较小，浸出液再循环到垃圾填埋场表面，有助于解释这些较高的浓度，从而突出了液体与固体（L/S）比例对浸出液特性的影响。与以前的研究不同，既没有发现恶臭问题，也没有发现表面有大量的垃圾填埋气。然而，从垃圾填埋场内采集的气体样本显示出硫酸盐还原和产甲烷活性。
