不同回用用途下典型城市污水再生处理工艺的生命周期评价分析  

LIFE CYCLE ASSESSMENT OF TYPICAL URBAN WASTEWATER RECLAMATION ALTERNATIVES WITH DIFFERENT RECYCLING USAGE

作　　者：侯兴[1,2] 张文龙[1,2] 罗小勇[2,3] 熊维[1,2] 李轶[1,2] 

机构地区：[1]河海大学浅水湖泊综合治理与资源开发教育部重点实验室,南京210098 [2]河海大学环境学院,南京210098 [3]长江水资源保护科学研究所,武汉430051

出　　处：《环境工程》2017年第2期153-157,189,共6页Environmental Engineering

基　　金：江苏省高校品牌专业建设工程资助项目(PPZY2015A051);河海大学大学生创新训练计划(2015102941046);国家水体污染控制与治理科技重大专项(2012ZX07506-002-2)

摘　　要：对3种典型城市污水再生处理工艺(微絮凝+砂滤+消毒(MSD)、混凝+转盘过滤+消毒(CRD)和混凝沉淀+超滤+消毒(CUD))进行生命周期环境影响定量评价,探讨了不同工艺在不同回用用途下的环境表现。结果表明:MSD工艺在富营养化(EP)方面的影响略高,归一化结果为9.32E-15,其他方面环境影响均小于CRD和CUD工艺;不同回用用途的污水再生可在某些方面抵消原需水产生的环境影响,有一定环境效益,不同出水用途的替代抵消作用可影响环境表现。以砂滤为主的典型城市污水再生处理工艺在出水用于工业冷却水时,归一化加权结果为其他两种工艺的25%和7.5%,具有较好的应用前景。Three typical urban wastewater reclamation alternatives（MSD,CRD and CUD） were researched using a life cycle assessment method to quantify life cycle environmental impact. Selections of the wastewater reuse treatment processes were considered from the perspective of resource and energy consumption. Characterized and normalized data were calculated and then the main aspects and key factors of three alternatives were analyzed to see different environmental performances. These three alternatives all had advantages and disadvantages in different environmental impact categories,where MSD process had the best environmental performance. When considering the different usages of recycling,wastewater reclamation could offset the environmental impact of demanded water in some areas,resulting in environmental benefits. To a large degree,the offsetting under different recycling usages would affect final environmental performance. The sand-based filtration process with the industrial cooling water application was recommended in this study.

关 键 词：污水再生 回用用途 生命周期评价 环境影响 

分 类 号：X703[环境科学与工程—环境工程]