摘要
再生水回用是降低水污染、改善水环境、提高水资源利用率的重要途径,但这一过程同步增加了药剂和能源的消耗,以及温室气体排放等。研究再生水回用对典型污水处理工艺的生态效应影响,可为污水处理策略的全过程优化提供支持。文中采用生命周期评价法,从元素资源消耗(ADPE)、化石燃料消耗(ADPF)、臭氧层耗竭(ODP)、全球变暖(GWP)、酸化(AP)、富营养化(EP)、淡水生态毒性(FAETP)、陆地生态毒性(TETP)和人类毒性(HTP)9种环境效应,对比分析了常规污水处理工艺AAO和再生水处理工艺AAO+MBR的生态效应。结果表明,AAO+MBR工艺对EP的削减效果是AAO工艺的1.1倍,污水处理效果优于单独使用厌氧/缺氧/好氧(AAO)工艺;AAO+膜生物反应器(MBR)工艺对ADPE、ADPF、ODP、GWP、AP、FAETP、TETP、HTP的负面影响均高于AAO工艺;进一步在20%、40%、60%、80%和100%不同再生水回用率情景下比较AAO工艺和AAO+MBR工艺对9种环境效应的影响,发现再生水回用率显著影响ADPE、ADPF、FAETP、ODP,当再生水回用率为100%时,对环境影响下降45%~100%;对AP、GWP、TETP、HTP的影响较小,当再生水回用率为100%时,对环境影响下降17%~25%;对EP影响则不显著,随着再生水回用率变化,EP基本保持不变。研究可为污水处理决策优化提供支持。
Wastewater recycling is an important way to reduce water pollution,improve water environment and increase water resource utilization.However,this process often leads to increased consumption of pharmaceuticals,energy and emission of greenhouse gas.Research on the ecological impacts of reclaimed water reuse on typical wastewater treatment procedures can optimize wastewater treatment strategies.In this research,the life cycle assessment method was used to evaluate the abiotic depletion potential of elements(ADPE),depletion potential of fossil resources(ADPF),ozone depletion potential(ODP),global warming potential(GWP),acidification potential(AP),eutrophication potential(EP),freshwater ecotoxicity potential(FAETP),terrestrial ecotoxicity(TETP)and human ecotoxicity potential(HTP).The ecological effects of conventional wastewater treatment process anaerobic-anoxicoxic(AAO)and reclaimed water treatment process AAO+MBR were compared and analyzed.The results revealed that AAO+MBR process reduced EP by 1.1 times more than AAO process,and it treated wastewater more effectively than AAO process alone.In comparison to AAO process,AAO+membrane bioreactor(MBR)process had a greater impact on ADPE,ADPF,ODP,GWP,AP,FAETP,TETP,HTP.Additionally,the effects of the AAO process and the AAO+MBR process on nine environmental effects were contrasted under scenarios with various effluent reuse rates of 20%,40%,60%,80%,and 100%.The findings demonstrated that ADPE,ADPF,FAETP,and ODP were significantly impacted by reuse of reclaimed water.While when the water reuse rate was 100%,the environmental impact was reduced by 45%to 100%,respectively.When the water reuse rate was 100%,the environmental impact was reduced by 17%to 25%and the impact on eutrophication was negligible.With the change in water reuse rate,EP essentially stayed the same.This study can provide support for the optimization of wastewater treatment decision-making.
作者
甄晨曦
刘熙刚
张晓斌
赵荔
王慧
ZHEN Chenxi;LIU Xigang;ZHANG Xiaobin;ZHAO Li;WANG Hui(Beijing Uni-Construction Group Co.,Ltd.,Beijing 100101,China;Beijing Lanhaishiyi Environmental Science&Technology Co.,Ltd.,Beijing 102208,China;Tongzhou District Commission of Housing and Urban-Rural Development of Beijing Municipality,Beijing 101199,China;College of Water Science,Beijing Normal University,Beijing 100875,China)
出处
《净水技术》
CAS
2024年第5期125-132,共8页
Water Purification Technology
关键词
再生水
生态效应
污水处理
工艺
生命周期评价
recycled water
eco-efficiency
wastewater treatment
process
life cycle assessment
