改性聚丙烯基缓释碳源耦合生物膜水质净化器的脱氮效能研究  

Study on denitrification performance of modified polypropylene-based slow-release carbon source coupled with biofilm water purifier

作　　者：张玲 郝国兵 李申 戴苍松 俞志敏 张利兰[5] 邓呈逊 刘晓薇 ZHANG Ling;HAO Guo-bing;LI Shen;DAI Cang-song;YU Zhi-min;ZHANG Li-lan;DENG Cheng-xun;LIU Xiao-wei(School of Biology,Food,and Environment,Hefei University,Hefei 230601,China;International(Sino-German)Joint Research Center for Biomass of Anhui Province,Hefei 230601,China;Anhui Jiuwu Tianhong Environmental Protection Technology Co.,Ltd.,Hefei 230088,China;Hefei Water Clean Environmental Technology Co.,Ltd.,Hefei 231299,China;Academy of Environment and Ecology,Chongqing University,Chongqing 400044,China)

机构地区：[1]合肥大学生物食品与环境学院,安徽合肥230601 [2]安徽省生物质(中德)国际联合研究中心,安徽合肥230601 [3]安徽久吾天虹环保科技有限公司,安徽合肥230088 [4]合肥万鲤锦环境科技有限公司,安徽合肥231299 [5]重庆大学环境与生态学院,重庆400044

出　　处：《环境生态学》2024年第2期133-139,共7页Environmental Ecology

基　　金：合肥市关键技术“借转补”研发项目(2021GJ062);国家自然科学基金资助项目(52070063);安徽省高等学校自然科学研究项目(KJ2021A1011)资助。

摘　　要：固态缓释碳源逐渐成为提高低碳氮比(C/N)污水脱氮效能的有效方法。本研究制备了一种新型亲水改性多孔聚丙烯基缓释碳源材料(HEPP-C),并利用其作为生物填料构建生物膜水质净化器,对低C/N污水脱氮效能进行研究。结果表明:HEPP-C能够稳定持久地释碳;在间歇反硝化体系中,HEPP-C具有最高的脱氮效率,对NO_(3)^(-)-N和TN的去除率分别为89.6%和89.5%;连续流缓释碳源耦合生物膜净化体系中,HEPP-C缓释碳源能够显著提高NO_(3)^(-)-N和TN的去除效率,当进水NO_(3)^(-)-N含量低于20 mg/L、水力停留时间为12 h、曝气—停曝时间为8 h—4 h时,出水TN浓度为1.24 mg/L,低于地表水Ⅵ类水质标准值。可见,构建的HEPP-C基缓释碳源耦合生物膜水质净化器能够对低污染污水以及河湖水体实现有效脱氮。Solid slow-release carbon sources have gradually become an effective method to improve the denitrification efficiency of low carbon-to-nitrogen ratio(C/N)wastewater.We prepared a novel hydrophilically modified porous polypropylene-based slow-release carbon source material(HEPP-C).Utilizing it as a biological filler,we constructed a biofilm water purifier to study the denitrification efficiency of low C/N wastewater.HEPP-C exhibited a more stable and prolonged carbon release performance.In the intermittent denitrification system,HEPP-C achieved the highest denitrification efficiency,with removal rates of NO_(3)^(-)-N and TN being 89.6%and 89.5%,respectively.In the continuous-flow slow-release carbon source coupled with the biofilm purification system,the HEPP-C carbon source enhanced the removal efficiency of NO_(3)^(-)-N and TN notably.When the influent NO_(3)^(-)-N concentration was below 20 mg/L,with a hydraulic retention time of 12 h and an aeration-non-aeration cycle of 8 h—4 h,the effluent TN concentration after treatment was 1.24 mg/L,which is below the surface water quality standard of ClassⅥ.Thus,the established HEPP-C based slow-release carbon source coupled with a biofilm water purifier can effectively denitrify low-contaminated wastewater and river/lake waters.

关 键 词：多孔聚丙烯 缓释碳源 低碳氮比 生物填料 

分 类 号：X52[环境科学与工程—环境工程]