CO2-BALANCE OF SYSTEMS FOR SEPARATE COLLECTION OF RECYCLABLES
Introduction Within the framework of the climate protection discussion, aspects of the CO2 balance of waste management gain increasingly importance. In this way, ecological and economic criteria are essential. Especially in the case of recycling systems for packaging material, the question is how to favor them in terms of climate relevance. There are considerations to include non-packaging material along with packaging waste into the recyclables collection system. To what extent the separate collection could be replaced by new separate systems should be also discussed. These problems are examined currently by the authors. Material and methods Basis for the analysis are three different waste management structures. The complete waste management chain was analysed starting at the collection via transportation, up to the waste treatment. Different disposal scenarios, including separate and common collection, were considered. Modelling occurred according to the procedure for environmental life cycle assessment (DIN EN ISO 14040ff). Results from current pilot experiments were also incorporated. The processes were represented according to the state of the art. During substitution of primary processes, CO2 savings were credited. For the evaluation sensitivity analyses were carried out. Results Results are represented as CO2-equivalents. It can be concluded that in the examined systems, for dry valuables materials a CO2 saving of 45 to 60 kg/cap.a is possible. Here, the valuable material bin achieves the highest CO2 saving through material recycling. In comparison, through energy recovery a CO2 reduction of 25 ％ is obtained. Since these results strongly depend on transportation distances, energetic efficiency, sorting and recycling rates and substitutions of primary processes, an individual case consideration for the specific areas is still unavoidable.
Separate collection packaging waste lifecycle assessment
Martin Kranert Detlef Clauβ Mihaela Berechet Nicolas Escalante
University of Stuttgart, Stuttgart, Germany
国际会议
北京
英文
299-304
2010-05-17（万方平台首次上网日期，不代表论文的发表时间）