建筑垃圾处理环境影响的生命周期评价

Life Circle Assessment on the Environmental Impacts of Construction Waste Disposal

为了量化评价建筑垃圾处理对环境的影响,提出了建筑垃圾处理的生命周期评价方法。分析了建筑垃圾的拆除、运输、处理三个阶段的资源消耗,并比较了建筑垃圾的回收利用、资源化和填埋处理等三种不同处理方式的资源消耗情况。应用该方法对广州某建筑物拆除的建筑垃圾进行分析。结果表明,建筑垃圾的回收利用、资源化和填埋处理的资源消耗指数分别为:2.91E-02、3.82E-02和4.98E-02。其中,填埋处理中土地资源的归一化值为1.95E-01,远大于不可再生资源的消耗。说明填埋处理对土地的占用量很大,今后应尽量避免采用填埋处理的方式,积极采用回收利用和资源化处理的方式。

In order to quantitatively assess the environmental impacts of construction waste disposal, a life cycle assessment method is put forward for construction waste disposal assessment. The resource consumption in three stages is analyzed, including construction waste removal, transport and disposal, and a comparison is made on the resource consumption situations of three different disposal ways, the construction waste recycling, resource recovery and landfill disposal. This method is applied to analyze the construction waste generated in the demolition of a building in Guangzhou. The results show that the resource consumption indexes of construction waste recycling, resource recycling and landfill disposal are 2.91E-02, 3.82E-02 and 4.98E-02, respectively. Among them, the normalized value of land resource by landfill disposal is 1.95E-01, far more than the consumption of non-renewable resources. It indicates that much land is occupied by landfill disposal, so it is suggested to avoid adopting the method of landfill disposal as far as possible in future, but to actively adopt the methods of recycling and resource recovery.