Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK.
Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK.
Waste Manag. 2015 Jun;40:157-66. doi: 10.1016/j.wasman.2015.03.017. Epub 2015 Mar 30.
This paper presents the results of the life cycle assessment (LCA) of 10 integrated waste management systems (IWMSs) for 3 potential post-event site design scenarios of the London Olympic Park. The aim of the LCA study is to evaluate direct and indirect emissions resulting from various treatment options of municipal solid waste (MSW) annually generated on site together with avoided emissions resulting from energy, materials and nutrients recovery. IWMSs are modelled using GaBi v6.0 Product Sustainability software and results are presented based on the CML (v.Nov-10) characterisation method. The results show that IWMSs with advanced thermal treatment (ATT) and incineration with energy recovery have the lowest Global Warming Potential (GWP) than IWMSs where landfill is the primary waste treatment process. This is due to higher direct emissions and lower avoided emissions from the landfill process compared to the emissions from the thermal treatment processes. LCA results demonstrate that significant environmental savings are achieved through substitution of virgin materials with recycled ones. The results of the sensitivity analysis carried out for IWMS 1 shows that increasing recycling rate by 5%, 10% and 15% compared to the baseline scenario can reduce GWP by 8%, 17% and 25% respectively. Sensitivity analysis also shows how changes in waste composition affect the overall result of the system. The outcomes of such assessments provide decision-makers with fundamental information regarding the environmental impacts of different waste treatment options necessary for sustainable waste management planning.
本文介绍了针对伦敦奥林匹克公园 3 个潜在赛后场地设计场景的 10 种综合废物管理系统 (IWMS) 的生命周期评估 (LCA) 结果。LCA 研究的目的是评估每年在现场产生的城市固体废物 (MSW) 的各种处理方案的直接和间接排放，以及能源、材料和营养物质回收所避免的排放。IWMS 使用 GaBi v6.0 产品可持续性软件进行建模，并根据 CML（v.Nov-10）特征化方法展示结果。结果表明，与将垃圾填埋作为主要废物处理工艺的 IWMS 相比，具有先进热处理 (ATT) 和带有能量回收的焚烧的 IWMS 具有最低的全球变暖潜能值 (GWP)。这是由于与热处理工艺相比，垃圾填埋过程中的直接排放量较高，而避免排放量较低。LCA 结果表明，通过用回收材料替代原始材料，可以实现显著的环境节约。对 IWMS1 进行的敏感性分析的结果表明，与基线情景相比，将回收利用率提高 5%、10%和 15%，分别可以减少 8%、17%和 25%的 GWP。敏感性分析还显示了废物组成的变化如何影响系统的整体结果。此类评估的结果为决策者提供了有关不同废物处理方案的环境影响的基本信息，这是可持续废物管理规划所必需的。
