Miller C Andrew, Lemieux Paul M
U.S. Environmental Protection Agency, Office of Research and Development, National Risk Management Research Laboratory, Research Triangle Park, NC, 27711, USA.
J Air Waste Manag Assoc. 2007 Aug;57(8):959-67. doi: 10.3155/1047-3289.57.8.959.
Although air curtain destructors (ACDs) have been used for quite some time to dispose of vegetative debris, relatively little in-depth testing has been conducted to quantify emissions of pollutants other than CO and particulate matter. As part of an effort to prepare for possible use of ACDs to dispose of the enormous volumes of debris generated by Hurricanes Katrina and Rita, the literature on ACD emissions was reviewed to identify potential environmental issues associated with ACD disposal of construction and demolition (C&D) debris. Although no data have been published on emissions from C&D debris combustion in an ACD, a few studies provided information on emissions from the combustion of vegetative debris. These studies are reviewed, and the results compared with studies of open burning of biomass. Combustion of vegetative debris in ACD units results in significantly lower emissions of particulate matter and CO per unit of mass of debris compared with open pile burning. The available data are not sufficient to make general estimates regarding emissions of organic or metal compounds. The highly transient nature of the ACD combustion process, a minimal degree of operational control, and significant variability in debris properties make accurate prediction of ACD emissions impossible in general. Results of scoping tests conducted in preparation for possible in-depth emissions tests demonstrate the challenges associated with sampling ACD emissions and highlight the transient nature of the process. The environmental impacts of widespread use of ACDs for disposal of vegetative debris and their potential use to reduce the volume of C&D debris in future disaster response scenarios remain a considerable gap in understanding the risks associated with debris disposal options.
尽管气幕销毁器（ACD）已被用于处理植物性废弃物有相当一段时间了，但除了一氧化碳和颗粒物外，针对其他污染物排放进行的深入测试相对较少。作为为可能使用气幕销毁器处理卡特里娜飓风和丽塔飓风产生的大量废弃物所做准备工作的一部分，对气幕销毁器排放的文献进行了综述，以确定与气幕销毁器处理建筑和拆除（C&D）废弃物相关的潜在环境问题。尽管尚未有关于气幕销毁器中建筑和拆除废弃物燃烧排放的数据发表，但一些研究提供了关于植物性废弃物燃烧排放的信息。对这些研究进行了综述，并将结果与生物质露天燃烧的研究进行了比较。与露天堆放燃烧相比，气幕销毁器装置中植物性废弃物的燃烧每单位质量废弃物产生的颗粒物和一氧化碳排放量显著更低。现有数据不足以对有机化合物或金属化合物的排放进行总体估算。气幕销毁器燃烧过程的高度瞬态性、操作控制程度极低以及废弃物特性的显著变异性使得一般情况下准确预测气幕销毁器的排放是不可能的。为可能进行的深入排放测试所做的范围界定测试结果表明了与气幕销毁器排放采样相关的挑战，并突出了该过程的瞬态性质。在理解与废弃物处置选项相关的风险方面，广泛使用气幕销毁器处理植物性废弃物的环境影响及其在未来灾害应对场景中用于减少建筑和拆除废弃物体积的潜在用途仍然存在相当大的差距。
