建筑垃圾再生砖和混凝土骨料混合基质人工湿地处理微污染水及应用  

RECYCLED BRICK AND CONCRETE AGGREGATES FROM CONSTRUCTION AND DEMOLITION WASTE MIXED AS SUBSTRATES IN CONSTRUCTED WETLAND FOR TREATMENT OF MICRO-POLLUTED WATER AND ITS APPLICATIONS

作　　者：李云青 李海燕[1,2] 刘兆瀛 张轶慧 简美鹏 武利园 李昆[2,4] LI Yunqing;LI Haiyan;LIU Zhaoying;ZHANG Yihui;JIAN Meipeng;WU Liyuan;LI Kun(Beijing Energy Conservation&Sustainable Urban and Rural Development Provincial and Ministry Co-construction Collaboration Innovation Center,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Yizhuang Environmental Technology Group Co.,Ltd.,Beijing 100176,China;Radio,Film&TV Design and Research Institute,Beijing 100045,China)

机构地区：[1]北京建筑大学北京节能减排与城乡可持续发展省部共建协同创新中心,北京100044 [2]北京建筑大学北京市可持续城市排水系统构建与风险控制工程技术研究中心,北京100044 [3]北京亦庄环境科技集团有限公司,北京100176 [4]中广电广播电影电视设计研究院有限公司,北京100045

出　　处：《环境工程》2024年第7期120-128,共9页Environmental Engineering

基　　金：青年北京学者计划(NO.024);北京市教委-市自然基金联合资助项目(21JH0024);北京建筑大学金字塔人才工程-建大领军培养计划(JDLJ20200301)。

摘　　要：为提高建筑垃圾再生骨料对实际微污染水的净化能力,采用再生砖骨料(RBA)和再生混凝土骨料(RCA)混合物作为基质构建垂直流人工湿地系统,设置2种配比:CW1(80%RBA+20%RCA)和CW2(50%RBA+50%RCA),并设置以天然骨料(沸石、火山岩、石灰石)为基质的对照组。结果表明:稳定运行期内,CW1和CW2对TP去除率分别为57.5%和42.7%,相比对照组分别提高38.9%和24.1%;提高再生混凝土骨料比例的CW2对NH_(3)-N、TN、COD的去除效果与天然骨料系统接近,去除率分别为70.2%、16.9%和63.5%,达到了以废治污的效果。内梅罗污染指数计算进一步证明,提高再生混凝土骨料的比例有利于提升再生骨料系统的综合控污效能,优于传统天然骨料系统。环境风险评价表明,再生骨料系统在稳定运行阶段出水各污染物的环境风险等级均为理想级,对受纳水体影响较小。经济性分析表明,CW2系统的成本最低,效益显著。采用50%再生砖骨料与50%再生混凝土骨料混合基质的垂直流人工湿地系统成功在温榆河湿地公园进行了示范应用,当进水水质超过GB 3838—2002《地表水环境质量标准》Ⅳ类水质标准限值时,各出水点出水NH_(3)-N、TP、COD均达到Ⅲ类水质标准。To improve the purification capacity of recycled aggregates from construction and demolition waste for actual micro-polluted water,a mixture of recycled brick aggregate(RBA)and recycled concrete aggregate(RCA)in two proportions was used as substrates to construct two vertical flow constructed wetland(VFCW)systems,namely CW1(80%RBA+20%RCA)and CW2(50%RBA+50%RCA).A control group with natural aggregates(zeolite,lava rock,limestone)as substrates was set up.The results showed that the TP removal efficiencies during the stable operation period of CW1 and CW2 were 57.5%and 42.7%,respectively,which were 38.9%and 24.1%higher compared to the control group.The NH_3-N,TN,and COD removal effect of CW2 with an increased proportion of RCA was close to that of the system with natural aggregates,with removal efficiencies of 70.2%,16.9%,and 63.5%,respectively,achieving the effect of treating pollution with waste materials.The calculation of the Nemerow pollution index further demonstrated that increasing the proportion of RCA was conducive to improving the comprehensive pollution control efficiency of the systems with recycled aggregates,which was better than the systems with traditional natural aggregates.The environmental risk assessment indicated that the environmental risk level of effluent each pollutant in the recycled aggregate systems during the stable operation phase was at a desirable level,with a low impact on the receiving water.The economic analysis showed that the CW2 had the lowest cost and significant benefits.The VFCWs using a mixture of 50%RBA and 50%RCA as the substrate was successfully applied in the Wenyu River Wetland Park in Beijing.When the influent water quality exceeded the limit of the ClassⅣof Environmental Quality Standards for Surface Water(GB 3838—2002),the effluent NH_3-N,TP,and COD of each outlet point all met the ClassⅢwater quality standard.

关 键 词：建筑垃圾 再生骨料 垂直流人工湿地 水质净化 示范应用 

分 类 号：X799.1[环境科学与工程—环境工程] X52