杭州市某典型建筑垃圾资源化处理项目的技术过程碳减排效益分析

Carbon emission reduction benefit analysis of the technical process of a typical construction waste recycling project in Hangzhou

采用生命周期评价方法对杭州市某年处理10万t的典型建筑垃圾资源化处理项目进行技术过程的碳减排效益分析,主要包括破碎分选、高值外售、再生利用、除尘系统和最终处置5个工艺单元。结果显示,建筑垃圾资源化处理项目的技术过程具有明显的碳减排效益,处理1.00 t建筑垃圾的碳排放量为-423.85 kg(以CO_(2)当量计),主要得益于高值外售和再生利用两个工艺单元的碳减排,尤其是再生利用工艺单元的4条生产线(砌块生产线、联合磨粉生产线、水稳拌合站和燃料棒生产线)。建议进一步提高建筑垃圾的精细化物理分离率以减少填埋处置量,开发低耗高效的建筑垃圾除尘工艺或设备,尽可能多地资源化利用建筑垃圾。

The life cycle assessment method was adopted to evaluate the technical process of a typical construction waste recycling project with treating ability of 100000 t every year in Hangzhou.Treatment units included crushing and sorting,high-value export,recycling,dust removal system and final disposal.Results showed that:carbon emission reduction benefit of the project was significant,and its carbon emission was-423.85 kg(measured by CO_(2) equivelence)for 1.00 t of construction waste.The significant carbon emission reduction benefit was mainly owing to the two treatment units of high-value export and recycling,especially the 4 recycling production lines(block production line,combined powder production line,cement mixing station and fuel rod waste production line).It was suggested to improve the physical separation efficiency of construction waste so as to reduce final landfill disposal amount,develop low-cost and efficient construction waste dust removal process or device,and reuse construction waste as more as possible.