快速城镇化引发大规模的城市建设及更新活动,造成大量建筑垃圾的产生。以简易堆置为主的粗放处理模式侵占了宝贵的土地资源,并给生态环境造成巨大压力,同时也是对可再生建材资源的极大浪费。加强建筑垃圾的环境管理是提升新型城镇化建设和大规模城区改造的重要内容,也是目前乃至今后较长一段时间城市可持续发展面临的严峻挑战。本文对我国建筑垃圾的产生特性、回收管理及其处理处置现状进行了系统研究,并与其他国家和地区进行了对比分析。结果表明,我国建筑垃圾年均产生量达到20亿吨,约为生活垃圾清运量的15倍,且以拆除垃圾为主(约75%),资源利用率(约5%)相对较低,大大低于日本(95%)和欧盟(90%)等发达国家和地区。此外,我国建筑垃圾产生量占全球总量的75%,是欧盟的4。5倍。人均产生量也高于其他国家,达到2。5吨/年,是欧盟的1。8倍和美国的5倍。研究结果可为建筑垃圾减量化、资源化和无害化管理提供科学依据。
<<Rapid urbanization in China has led to large-scale urban construction and renovation activities,and also caused large quantity of construction and demolition waste(CDW). Many land resources have been consumed by CDW since dumping-oriented disposal is a primary way,which not only results in great damage to the ecological environment,but also causes a huge waste of resources. Enhancing the effective management of CDW is extremely crucial to promote the development of urbanization and large-scale urban renewal. This is also a significant challenge for urban sustainable development for future. This paper makes a systematic review on the generation,recycling,and disposal of CDW in China. The results show that over 2 billion ton CDW has been generated annually in China,which is 15 times higher than the quantity of municipal solid waste. Demolition waste accounts for 75% of the total quantity. However,both recycling rate(5% only)and technologies level(equipment)are extremely low,which is significantly lower than EU(90%)and Japan(95%). In addition,the amount of CDW in China accounts for 75% of the total quantity in the global,which is 4.5 times higher than EU. China’s CDW generation rate(per capita,2.5 ton per year)is also higher than many countries,which is 1.8 and 5 times higher than EU and the U.S.,respectively. The results could beneficial for the reduction,recycling and environmentally sound management of C&D waste.
<<Keywords: | Environmental ManagementConstruction and Demolition WasteWaste GenerationAppropriation of Land |