Department of civil and Environmental Engineering, American University of Beirut, Lebanon.
Department of civil and Environmental Engineering, American University of Beirut, Lebanon.
Waste Manag. 2017 Nov;69:455-462. doi: 10.1016/j.wasman.2017.08.008. Epub 2017 Aug 10.
In this study, the carbon footprint of introducing a food waste disposer (FWD) policy was examined in the context of its implications on solid waste and wastewater management with economic assessment of environmental externalities emphasizing potential carbon credit and increased sludge generation. For this purpose, a model adopting a life cycle inventory approach was developed to integrate solid waste and wastewater management processes under a single framework and test scenarios for a waste with high organic food content typical of developing economies. For such a waste composition, the results show that a FWD policy can reduce emissions by nearly ∼42% depending on market penetration, fraction of food waste ground, as well as solid waste and wastewater management schemes, including potential energy recovery. In comparison to baseline, equivalent economic gains can reach ∼28% when environmental externalities including sludge management and emissions variations are considered. The sensitivity analyses on processes with a wide range in costs showed an equivalent economic impact thus emphasizing the viability of a FWD policy although the variation in the cost of sludge management exhibited a significant impact on savings.
在本研究中，我们考察了在固体废物和废水管理方面实施厨余垃圾处理器（FWD）政策的碳足迹，同时还评估了环境外部性的经济影响，强调了潜在的碳信用和增加的污泥生成。为此，我们采用生命周期清单方法开发了一个模型，将固体废物和废水管理过程整合在一个单一框架内，并针对具有高有机食品含量的发展中经济体典型废物进行了测试情景模拟。对于这种废物组成，结果表明，FWD 政策可以根据市场渗透率、食物垃圾粉碎的比例以及固体废物和废水管理方案（包括潜在的能源回收），将排放量减少近 42%。与基线相比，当考虑包括污泥管理和排放变化在内的环境外部性时，等效的经济收益可达到约 28%。对成本变化范围较大的各个过程进行的敏感性分析表明，尽管污泥管理成本的变化对节省有重大影响，但 FWD 政策具有可行性，因此具有等效的经济影响。
