污水厂尾水净化人工湿地冬季强化脱氮中试研究
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- 英文论文题名：Pilot-Scale Study on Enhanced Nitrogen Removal of Constructed Wetlands for Advanced Purification of Tail Water from Wastewater Treatment Plant in Winter Season.
- 论文作者：于晓霞 ; 庄涛 ; 刘阳 ; 王冬莹 ; 赵玉强
- 英文论文作者：YU Xiao-xia ; ZHUANG Tao ; LIU Yang ; WANG Dong-ying ; ZHAO Yu-qiang ; Environmental Research Institute of Jinan
- 年：2017
- 作者机构：济南市环境研究院;
- 论文关键词：人工湿地 ; 冬季 ; 脱氮 ; 硝化 ; 反硝化 ; 强化措施
- 英文论文关键词：constructed wetlands ; winter season ; nitrogen removal ; nitrification ; denitrification ; enhanced treatment
- 会议召开时间：2017-04-08
- 会议录名称：2017第九届河湖治理与水生态文明发展论坛论文集
- 语种：中文
- 分类号：X703
- 学会代码：SLJS
- 会议名称：2017第九届河湖治理与水生态文明发展论坛
- 会议地点：中国陕西西安
- 主办单位：流域水循环模拟与调控国家重点实验室、国际水生态安全中国委员会、长江水利委员会长江科学院、南京大学常熟生态研究院
- 学会名称：中国水利技术信息中心
- 页数：8
- 文件大小：627k
- 原文格式：O
- 会议级别：全国
摘要
在中试尺度的潜流、曝气和潮汐流人工湿地上,以污水厂尾水为净化对象,试验了秸秆覆盖、降低水力负荷和投加碳源对冬季脱氮效果的影响。结果表明,强化措施能够有效促进反硝化作用,提高了各潜流人工湿地的总氮去除率。其中曝气人工湿地在秸秆覆盖+投加碳源的强化措施下,总氮去除率达到50.98%。但秸秆覆盖、投加碳源的强化措施会降低湿地内溶解氧浓度而削弱硝化作用,导致氨氮去除率的下降。曝气可缓解强化措施的负面影响,曝气人工湿地在秸秆覆盖+降低水力负荷的强化措施下,氨氮去除率达到46.9%。
The objective of this study was to assess the role of straw insulation,reducing hydraulic loading and dosing carbon source on nitrogen removal by pilot-scale subsurface-flow,aerated and tidal-flow constructed wetlands,which were used for advanced purification of tail water from wastewater treatment plant.Each enhanced treatment was shown to strengthen the total nitrogen removal of all the three constructed wetlands by facilitating denitrification process.The removal rate of total nitrogen by aerated constructed wetland reached 50.98%under the enhanced treatments combination of straw insulation and dosing carbon source.However,straw insulation and dosing carbon source could lead to a decline in ammonia removal,because of the weaken nitrification due to the decreased dissolved oxygen.Aeration could mitigate the negative impact of the enhanced treatments,and the removal rate of ammonia by aerated constructed wetland reached 46.9%under the enhanced treatments combination of straw insulation and reducing hydraulic loading.
The objective of this study was to assess the role of straw insulation,reducing hydraulic loading and dosing carbon source on nitrogen removal by pilot-scale subsurface-flow,aerated and tidal-flow constructed wetlands,which were used for advanced purification of tail water from wastewater treatment plant.Each enhanced treatment was shown to strengthen the total nitrogen removal of all the three constructed wetlands by facilitating denitrification process.The removal rate of total nitrogen by aerated constructed wetland reached 50.98%under the enhanced treatments combination of straw insulation and dosing carbon source.However,straw insulation and dosing carbon source could lead to a decline in ammonia removal,because of the weaken nitrification due to the decreased dissolved oxygen.Aeration could mitigate the negative impact of the enhanced treatments,and the removal rate of ammonia by aerated constructed wetland reached 46.9%under the enhanced treatments combination of straw insulation and reducing hydraulic loading.
引文
[1]袁英兰,常文越,张帆,等.人工湿地污染物去除效率稳定性分析——以沈阳市满堂河污水处理中心为例[J].环境保护科学,2011,3:31-33.
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[3]Lee C,Fletcher T D,Sun G Nitrogen removal in constructed wetland systems[J].Eng.Life Sci.,2009,9(1):11-22.
[4]黄锦楼,陈琴,许连煌.人工湿地在应用中存在的问题及解决措施[J].环境科学,2013,34(1):401-408.
[5]Li F,Lu L,Zheng X,et al.Enhanced nitrogen removal in constructed wetlands:effects of dissolved oxygen and step-feeding[J].Bioresource Technology,2014,169:395-402.
[6]Yan Y,Xu J.Improving winter performance of constructed wetlands for wastewater treatment in northern China:a review[J].Wetlands,2014,34:243-253.
[7]曾琪静,李德生,卢阳阳,等.强化人工湿地处理北方地区冬季生活污水的实验研究[J].水处理技术,2014,40(4):99-102.
[8]GB18918-2002,城镇污水处理厂污染物排放标准[S].
[9]陶敏,贺峰,胡晗,等.碳氧调控下人工湿地净化效果的协同与拮抗研究[J].中国环境科学,2015,35(12):3646-3652.
[10]高廷耀,顾国维.水污染控制工程[M].北京:高等教育出版社,2004.
[11]Kuschk P,Wie6ner A,Kappelmeyer U,et al.Annual cycle of nitrogen removal by a pilot-scale subsurface horizontal flow in a constructed wetland under moderate climate[J].Water Research,2003,37:4236-4242.
[12]Langergraber Q Pressl A,Leroch K,et al.Experiences with a top layer of gravel to enhance the performance of vertical flow constructed wetlands at cold temperatures[J].Water Science&Technology,2009,59(6):1111-1116.
[13]廖晓数,贺峰,徐栋,等.低C/N对湿地中硝化反硝化作用的影响[J].中国环境科学,2008,28(7):603-607.
[14]Li L,He C,Ji G et al.Nitrogen removal pathways in a tidal flow constructed wetland under flooded time constraints[J].Ecological Engineering,2015,81:266-271.
[15]Redmond E D,Just C L,Parkin G F.Nitrogen removal from wastewater by an aerated subsurface-flow constructed wetland in cold climates[J].Water Environment Research,2014,86(4):305-313.
[2]谷先坤,王国祥,刘波,等.复合垂直流人工湿地净化污水厂尾水的研究[J].中国给水排水,2011,27(3):8-11.
[3]Lee C,Fletcher T D,Sun G Nitrogen removal in constructed wetland systems[J].Eng.Life Sci.,2009,9(1):11-22.
[4]黄锦楼,陈琴,许连煌.人工湿地在应用中存在的问题及解决措施[J].环境科学,2013,34(1):401-408.
[5]Li F,Lu L,Zheng X,et al.Enhanced nitrogen removal in constructed wetlands:effects of dissolved oxygen and step-feeding[J].Bioresource Technology,2014,169:395-402.
[6]Yan Y,Xu J.Improving winter performance of constructed wetlands for wastewater treatment in northern China:a review[J].Wetlands,2014,34:243-253.
[7]曾琪静,李德生,卢阳阳,等.强化人工湿地处理北方地区冬季生活污水的实验研究[J].水处理技术,2014,40(4):99-102.
[8]GB18918-2002,城镇污水处理厂污染物排放标准[S].
[9]陶敏,贺峰,胡晗,等.碳氧调控下人工湿地净化效果的协同与拮抗研究[J].中国环境科学,2015,35(12):3646-3652.
[10]高廷耀,顾国维.水污染控制工程[M].北京:高等教育出版社,2004.
[11]Kuschk P,Wie6ner A,Kappelmeyer U,et al.Annual cycle of nitrogen removal by a pilot-scale subsurface horizontal flow in a constructed wetland under moderate climate[J].Water Research,2003,37:4236-4242.
[12]Langergraber Q Pressl A,Leroch K,et al.Experiences with a top layer of gravel to enhance the performance of vertical flow constructed wetlands at cold temperatures[J].Water Science&Technology,2009,59(6):1111-1116.
[13]廖晓数,贺峰,徐栋,等.低C/N对湿地中硝化反硝化作用的影响[J].中国环境科学,2008,28(7):603-607.
[14]Li L,He C,Ji G et al.Nitrogen removal pathways in a tidal flow constructed wetland under flooded time constraints[J].Ecological Engineering,2015,81:266-271.
[15]Redmond E D,Just C L,Parkin G F.Nitrogen removal from wastewater by an aerated subsurface-flow constructed wetland in cold climates[J].Water Environment Research,2014,86(4):305-313.