Department of Civil, Environmental, Land, Building Engineering and Chemistry (DICATECh), Politecnico di Bari, Via E. Orabona n.4, I-70125 Bari, Italy.
Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II n. 132, I-84084 Fisciano, SA, Italy.
Sci Total Environ. 2023 May 1;871:161958. doi: 10.1016/j.scitotenv.2023.161958. Epub 2023 Feb 1.
The partial degradation of cellulose-based bioplastics in industrial treatment of organic fraction of Municipal Solid Waste (MSW) opened to the investigation of further disposal routes for bioplastics in the waste management system. For this purpose, the environmental footprint of three MSW management scenarios differing only for the bioplastics final destination (organic, plastic or mixed waste streams) was assessed through a Life Cycle Assessment (LCA) approach. Results revealed how the treatment of bioplastics with organic waste achieved the worst environmental performance (5.8 kg CO eq/FU) for most impact categories. On the other hand, treatment with plastics and mixed waste achieved negative impact values (that mean avoided GHG emissions) of -9.8 and -7.7 kg CO eq/FU respectively, showing comparable benefits from these scenarios. The key reason was the lower quality of compost obtained from the organic treatment route, which reduced the environmental credits achieved by the energy recovery during anaerobic digestion.
在城市固体废物（MSW）有机部分的工业处理中，纤维素基生物塑料的部分降解为生物塑料在废物管理系统中的进一步处置途径开辟了调查途径。为此，通过生命周期评估（LCA）方法评估了仅在生物塑料最终去向（有机、塑料或混合废物流）方面有所不同的三种 MSW 管理情景的环境足迹。结果表明，用有机废物处理生物塑料在大多数影响类别中表现出最差的环境性能（5.8 kg CO eq/FU）。另一方面，用塑料和混合废物处理分别实现了-9.8 和-7.7 kg CO eq/FU 的负影响值（这意味着避免了温室气体排放），显示出这些情景具有可比的效益。主要原因是从有机处理路线获得的堆肥质量较低，这降低了厌氧消化过程中能源回收所获得的环境信用。
