Life-cycle assessment of using liquid hazardous waste as an alternative energy source during Portland cement manufacturing: A United States case study
Life-cycle assessment of using liquid hazardous waste as an alternative energy source during Portland cement manufacturing: A United States case study
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DOI：
10.1016/j.jclepro.2018.05.214
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发表时间：
2018-09
影响因子：
11.1
通讯作者：
S. P. Holt;N. Berge
中科院分区：
文献类型：
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作者：
S. P. Holt;N. Berge
这项研究的目的是使用生命周期评估来评估与使用煤炭的设施相比，在美国的水泥制造过程中使用液体危险废物作为替代燃料来源是否改善了系统环境影响。这项研究的结果表明，用危险废物取代煤炭减少了与全球变暖影响、酸化影响和淡水生态毒性相关的环境影响，而对癌症的人类毒性影响和与富营养化相关的环境影响增加。通过回收过程中的废热、冷却废气和发电以抵消电力需求来减少电网购电，可以减少与场外电网购电相关的环境影响，应考虑进一步减少环境影响。此外，这些结果证实，在水泥制造过程中混合燃烧危险废物，并用高能量的危险废物取代煤炭等化石燃料，有一定的积极环境影响。
The goal of this study was to use life cycle assessment to evaluate whether using liquid hazardous waste as an alternative fuel source in cement manufacturing processes located in the United States improves system environmental impact when compared with a facility using coal. Results from this study indicate that replacing coal with hazardous waste reduces the environmental impacts associated with the global warming impact, acidification impact, and freshwater ecotoxicity, while the human toxicity impacts for cancer and eutrophication-related environmental impacts increase. Reducing grid purchased electricity by recuperating waste heat from the process, cooling the exhaust gases and generating electricity to offset electrical demand, could reduce environmental impacts associated with off-site grid purchased electricity and should be considered for further environmental impact reductions. In addition, these results confirm that there are certain positive environmental effects associated with the co-burning of hazardous waste during cement manufacturing and replacing fossil fuels, such as coal, with high energy content hazardous waste.