基于LCA的MBfR污水深度脱氮应用潜力分析  

Application Potential Analysis of MBfR in Advanced Nitrogen Removal of Wastewater Based on Life Cycle Assessment

作　　者：牛子帆 傅慧俊[2] 赵和平[1,2] NIU Zi-fan;FU Hui-jun;ZHAO He-ping(College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058,China;Department of General Affairs,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学环境与资源学院,浙江杭州310058 [2]浙江大学总务处,浙江杭州310058

出　　处：《中国给水排水》2023年第3期88-93,共6页China Water & Wastewater

基　　金：浙江省重点研发计划项目(2021C03171);国家自然科学基金中欧国际合作重大项目(NSF32061133002)。

摘　　要：作为目前应用较广泛的污水深度脱氮工艺,深床反硝化滤池(下流式)操作简单且具有良好的脱氮效果,但该工艺需要外加碳源,这会增加能耗和碳排放量。氢基质膜生物膜反应器(MBfR)是一种新兴的水处理技术,因具有能耗低、碳排放量少、脱氮效率高等优点而受到了广泛关注。为了进一步评估MBfR在污水深度脱氮中的应用潜力,采用生命周期评价(LCA)方法,对两种深度脱氮工艺进行情景模拟和评价,分析两种工艺在应用过程中的能源消耗和碳排放情况。结果表明,相比深床反硝化滤池,MBfR工艺可降低43%的能耗,减少约47%的CO_(2)排放量,在实现相同处理效果的情况下对环境的影响更小,在二级出水深度脱氮处理中占有较明显的优势,可为推进污水处理厂提标改造和实现污水处理碳中和目标提供新思路。Deep bed denitrification filter(downflow)is widely used in advanced nitrogen removal of wastewater due to its simple operation and high nitrogen removal efficiency.However,this process requires additional carbon sources,which will increase energy consumption and carbon emissions.Hydrogen based membrane biofilm reactor(MBfR)is an emerging wastewater treatment technology,which has drawn worldwide attention due to its advantages of low energy consumption,low carbon emission and high nitrogen removal efficiency.To further evaluate the application potential of MBfR in advanced nitrogen removal of wastewater,the life cycle assessment(LCA)method was used to simulate and evaluate the performances of the two advanced nitrogen removal processes,and the energy consumption and carbon emissions of the two processes were analyzed.Compared with the deep bed denitrification filter,the MBfR reduced energy consumption by 43%and CO_(2)emission by approximately 47%,which had less impact on the environment under the condition of achieving the same treatment performance.It has obvious advantages in advanced nitrogen removal of the effluent from the secondary treatment process,which provides a new idea for promoting the upgrading and reconstruction of wastewater treatment plants and realizing the goal of carbon neutralization in wastewater treatment.

关 键 词：污水深度脱氮 氢基质膜生物膜反应器(MBfR) 深床反硝化滤池 生命周期评价 碳中和 

分 类 号：TU992[建筑科学—市政工程]