Waste Management & Research ( IF 3.9 ) Pub Date : 2020-12-25 , DOI: 10.1177/0734242x20978277 Md Musharof Hussain Khan 1 , Jouni Havukainen 1 , Mika Horttanainen 1
Cement production is responsible for a significant share of global greenhouse gas (GHG) emissions. A potential option to reduce the cement production emissions is to use alternative fuels which can have also an impact on emissions from the waste management sector. This work investigates the change in global warming potential (GWP) of ordinary Portland cement (OPC) production and affected waste management systems when conventional fuels are partially replaced by solid recovered fuel (SRF) made from commercial and industrial waste (C&IW). A life cycle assessment (LCA) was conducted with a functional unit of 1 metric tonne of OPC production and treatment of 194 kg of C&IW. Data from an existing cement plant have been used, where the share of SRF from total fuel energy demand increased from 0% to 53% between 2007 and 2016. Four scenarios were established with varying waste treatment methods and SRF share in the thermal energy mix of cement production. It was found that GHG emissions decreased by 20% from 1036 kg carbon dioxide (CO2), eq. (functional unit)-1 in Scenario 1 to 832 kg CO2, eq. (functional unit)-1 in Scenario 3. Furthermore, it is possible to reach a reduction of 30% to 725 kg CO2, eq. (functional unit)-1 in Scenario by increasing the share of SRF to 80%. In conclusion, significant GHG emissions reduction can be achieved by utilizing SRF in cement production. Especially in the middle-income and low-income countries where waste is dumped to the open landfills, emissions could be reduced without huge investments to waste incineration plants.
中文翻译:
利用固体回收燃料对水泥生产和废物管理系统的全球变暖潜能的影响:生命周期评估方法
水泥生产占全球温室气体(GHG)排放量的很大一部分。减少水泥生产排放量的潜在选择是使用替代燃料,这也可能对废物管理部门的排放产生影响。这项工作调查了普通波特兰水泥(OPC)生产和受影响的废物管理系统在全球变暖潜势(GWP)方面的变化,其中常规燃料部分由工商业废物(C&IW)制成的固体回收燃料(SRF)代替。使用1吨OPC生产和194千克C&IW的处理功能单元进行了生命周期评估(LCA)。使用了现有水泥厂的数据,SRF在总燃料能源需求中所占的比例在2007年至2016年之间从0%增加到53%。建立了四种方案,其中使用了不同的废物处理方法,并且SRF在水泥生产的热能结构中所占份额也有所提高。已发现,与1036千克二氧化碳(CO2)相比,温室气体排放量减少了20%。(功能单元)-1在方案1中达到832千克二氧化碳当量 方案3中的(功能单元)-1。此外,可以减少30%的二氧化碳排放至725 kg2,等式。场景中的(功能单元)-1,将SRF的份额提高到80%。总之,通过在水泥生产中使用SRF可以显着减少温室气体排放。特别是在将废物倾倒到露天垃圾填埋场的中等收入和低收入国家中,无需对废物焚烧厂进行大量投资就可以减少排放。