Penteado Carmenlucia Santos Giordano, Rosado Laís Peixoto
School of Technology, University of Campinas, Brazil
School of Technology, University of Campinas, Brazil.
Waste Manag Res. 2016 Oct;34(10):1026-1035. doi: 10.1177/0734242X16657605. Epub 2016 Jul 20.
Brazil, as a result of economic development and strengthening of the construction industry in recent years, is generating an increasing amount of construction and demolition waste (CDW). Hence, environmental assessment of the management systems is vital. A life cycle assessment (LCA) is presented of CDW management in a medium-sized municipality located in the southeast region of Brazil, where the impacts of leaching were not considered due to absence of consistent data. Six different proposed scenarios for the current CDW management situation have been considered. These scenarios comprised the combined use of landfilling, sorting, and recycling, and the use of CDW as paving material for landfill roads, in different percentages. Considering 0.8 ton of waste as the functional unit, the life cycle inventory was performed using primary data obtained from field survey and secondary data from the database Ecoinvent version 3.1, and from the literature. The method CML 2 baseline 2001 was used for environmental impacts evaluation. The results highlight that recycling is beneficial when efficient CDW sorting takes place at construction sites, avoiding the transport of refuse to sorting and recycling facilities, and the distance between the generation source and the recycling unit is within 30 km. Thus, our results are helpful to ensure that the decision-making processes are based on environmental and technical aspects, and not only on economic and political factors, and also provide data and support for other LCA studies on CDW.
近年来，由于经济发展和建筑业的壮大，巴西产生的建筑和拆除废物（CDW）数量日益增加。因此，对管理系统进行环境评估至关重要。本文对巴西东南部一个中等规模城市的CDW管理进行了生命周期评估（LCA），由于缺乏连贯数据，未考虑浸出的影响。针对当前CDW管理状况，考虑了六种不同的提议情景。这些情景包括不同百分比的填埋、分类和回收的组合使用，以及将CDW用作填埋场道路的铺路材料。以0.8吨废物作为功能单位，使用从实地调查获得的原始数据、数据库Ecoinvent 3.1版的二手数据以及文献中的数据进行生命周期清单分析。采用CML 2基线2001方法进行环境影响评估。结果表明，当在建筑工地进行高效的CDW分类，避免将垃圾运输到分类和回收设施，且产生源与回收单元之间的距离在30公里以内时，回收利用是有益的。因此，我们的结果有助于确保决策过程基于环境和技术方面，而不仅基于经济和政治因素，还为其他关于CDW的LCA研究提供数据和支持。
