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  • 张玲玲,张权,孙晓文,吴世军,陈繁荣.组合型人工湿地对二级好氧单元出水的深度处理[J].环境工程学报,2019,13(7):1592-1601.DOI:10.12030/j.cjee.201811083    [点击复制]
  • ZHANG Lingling,ZHANG Quan,SUN Xiaowen,WU Shijun,CHEN Fanrong.Advanced treatment of secondary aerobic unit effluent by combined constructed wetlands[J].,2019,13(7):1592-1601.DOI:10.12030/j.cjee.201811083   [点击复制]
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组合型人工湿地对二级好氧单元出水的深度处理
张玲玲1,2,张权1,2,孙晓文1,2,吴世军1,陈繁荣1
0
(1.中国科学院广州地球化学研究所,矿物学与成矿学重点实验室/广东省矿物物理与材料研究开发重点实验室,广州 510640;2.中国科学院大学,北京100049)
摘要:
经过好氧处理后,污水中有机碳通常被降解去除进而影响后续反硝化的进行。为了解决反硝化因缺少碳源受到抑制的问题,设计了3组人工湿地作为好氧单元出水的深度处理系统,并添加原污水作为反硝化碳源。3组人工湿地均由潮汐流人工湿地和潜流人工湿地叠置而成,编号分别为CW1、CW2和CW3,其中CW1、CW3为下行-上行复合流,CW2为下行单向流;CW2、CW3表层种植美人蕉(Canna indica),CW1不种植物。在水力负荷为30 cm·d-1的条件下,3组人工湿地对有机物的去除率都在70%左右。CW1对NH4+-N、TN和TP的平均去除率分别为71.2%、51.7%和35.9%;CW2对NH4+-N的处理效果最好,对TN的去除效果最差,平均去除率分别为91.5%和38.3%;CW3能够明显提高TN和TP的处理效果,平均去除率分别为69.9%和62.2%。复合流和种植美人蕉能够明显提高系统对污染物的综合处理性能,这对于优化人工湿地设计以及低C/N生活污水的深度脱氮均有重要的借鉴意义。
关键词:  潮汐流  潜流人工湿地  美人蕉  生活污水  深度脱氮
DOI:10.12030/j.cjee.201811083
投稿时间:2018-11-13
基金项目:广州市产学研协同创新重大专项项目201604020017;广东省应用型科技研发专项项目2017B020236003;广东省科技计划项目2017B030314175广州市产学研协同创新重大专项项目(201604020017);广东省应用型科技研发专项项目(2017B020236003);广东省科技计划项目(2017B030314175)
Advanced treatment of secondary aerobic unit effluent by combined constructed wetlands
ZHANG Lingling1,2,ZHANG Quan1,2,SUN Xiaowen1,2,WU Shijun1,CHEN Fanrong1
(1.Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;2.University of Chinese Academy of Sciences, Beijing 100049, China)
Abstract:
After aerobic treatment, organic carbon is normally depleted which limits the subsequent denitrification. Therefore, three new type constructed wetlands (CWs) named as CW1, CW2 and CW3, combining tidal flow constructed wetland (TFCW) and subsurface flow constructed wetland (SSFCW), were constructed to treat effluent from aerobic unit with raw sewage as organic carbon source. In these three CWs, Canna indica was planted on the top surface of CW2 and CW3, down-up compound flow was used in CW1 and CW3, while one-way flow was used in CW2. At hydraulic loading rate of 30 cm·d-1, COD removal efficiencies by all CWs were about 70%. The average removal efficiencies of NH4+-N, TN and TP by CW1 were 71.2%, 51.7% and 35.9%, respectively. CW2 had the best performance on NH4+-N removal (91.5%) and the worst performance on TN removal (38.3%). Comparably, CW3 could remove 69.9% of TN and 62.2% of TP in average, which were higher than CW1 and CW2. Consequently, better comprehensive removal efficiencies of pollutants were achieved in CW3 with compound flow and Canna indica, which could provide useful information for optimizing the design of constructed wetlands and the advanced treatment of domestic sewage with low C/N ratio.
Key words:  tidal flow  subsurface flow constructed wetland  Canna indica  domestic sewage  advanced nitrogen removal