Evaluation of wood waste recovery strategies using multi-criteria decision making

温哥华市（CoV）每年从该地区接收约13万吨建筑和拆除（C&D）垃圾。收到的土木工程废物中约有90%是木材，其中大部分**被填埋。根据《最绿色城市行动计划》，到2040年实现零废弃物的目标，**CoV正在考虑将木材废弃物转化为可销售的材料，如生物燃料、刨花板和纤维板。为实现这一目标，新冠病毒正在评估在德尔塔垃圾填埋场启动回收设施的潜力，以便将废物分类并处理成可管理和可销售的产品。在为期6个月的试点项目中，CoV**将2000多吨木材废料加工成木屑，使用了6-8台设备，并分析了**项目的财务可行性。试验项目的初步结果是令人鼓舞的，但是，如果扩大到全部规模，人们对废料的经济可行性和质量感到关切。**在实施之前评估有效的木材废物回收策略很重要，在分析中应考虑成本、风险、环境绩效和废物转换率等多种因素**。考虑不同的标准使决策过程复杂化，需要开发决策支持模型。在我们的研究中，我们的目标是开发一个多标准决策模型，该模型将用于为CoV提供可行的解决方案，以建立一个合适规模的工厂，并以可持续的方式执行其运营。在该模型中，经济可行性、环境绩效、风险和分流率将被考虑为标准。

The City of Vancouver (CoV) receives about 130,000 tonnes of construction and demolition (C&D) waste per**year from across the region. Around 90% of the received C&D waste is wood, of which the major portion is**landfilled. Aligned with the Greenest City Action Plan, in which a target is set to achieve zero waste by 2040,**CoV is considering the diversion of wood waste to marketable materials, e.g. biofuel, particle board, and fiber**boards. To achieve this, CoV is evaluating the potential to launch a recovery facility at Delta Landfill for**sorting and processing the waste into manageable and marketable products. In a 6-month pilot project, CoV**processed more than 2,000 tonnes of wood waste into wood chips, using 6-8 pieces of equipment and analyzed**the financial feasibility of the project. The preliminary results of the pilot project were encouraging, however,**there were concerns regarding the economic feasibility and quality of waste material, if expanded to full scale.**Assessing the efficient wood waste recovery strategy before implementation is important and multiple factors**such as cost, risk, environmental performance and waste diversion rate should be considered in the analysis.**Considering different criteria complicates the decision making process and requires developing decision**support models. In our research, we aim to develop a multi-criteria decision model which will be used to**provide viable solutions to CoV to build a right-sized plant and to perform their operations in a sustainable**manner. In the model, economic feasibility, environmental performance, risk, and diversion rates will be**considered as criteria.