引用本文:常洋,王海燕,储昭升,杭前宇,李莉,侯泽英,等.硫碳比对芦苇碳源-硫耦合表面流湿地脱氮的影响[J].环境科学研究,2017,30(11):1783-1792.
CHANG Yang,WANG Haiyan,CHU Zhaosheng,HANG Qianyu,LI Li,HOU Zeying,et al.Influence of Sulfur-to-Carbon Ratio on Nitrogen Removal by Phragmites australis and Sulfur Combined Surface Flow Construction Wetland[J].Reserrch of Environmental Science,2017,30(11):1783-1792.]
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 53次   下载 48 本文二维码信息
码上扫一扫!
分享到: 微信 更多
硫碳比对芦苇碳源-硫耦合表面流湿地脱氮的影响
常洋1,2, 王海燕1,2, 储昭升1,3, 杭前宇1,2, 李莉1,2, 侯泽英1,3
1. 中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012;2. 中国环境科学研究院水污染控制技术研究中心, 北京 100012;3. 中国环境科学研究院, 国家环境保护湖泊污染控制重点实验室, 湖泊水污染治理与生态修复技术国家工程实验室, 北京 100012
摘要:
针对农田退水中NO3--N占比高、碳氮比低的问题,提出PS-SFW (Phragmites australis and sulfur combined surface flow constructed wetland,芦苇碳源-硫耦合表面流人工湿地),对其强化农田退水脱氮的可行性进行了研究,并与SFW0(无芦苇碳源-硫填充的常规表面流湿地)进行对比,重点研究了HRT (水力停留时间)为3、2、4 d条件下S/C (质量比,分别为0.32、0.56)对PS-SFW脱氮效能的影响.结果表明,HRT为3 d (第29~40天)时,PS-SFW0.32(S/C比为0.32)、PS-SFW0.56(S/C比为0.56)和SFW0w(NO3--N)分别为55.9%±11.0%、66.0%±10.0%和7.0%±3.0%,w(TN)分别为36.9%±1.0%、40.3%±3.0%和4.5%±2.0%,PS-SFW0.56对TN和NO3--N去除效能高于PS-SFW0.32,远高于SFW0;HRT为4 d时(第41~81天)及HRT为3 d (第130~149天)时,PS-SFW0.32、PS-SFW0.56、SFW0w(NO3--N)为66.3%±5.0%、90.5%±4.0%、14.4±4.0%和53.4%±3.0%、62.9%±10.0%、48.5%±5.0%,w(TN)为55.5%±5.0%、75.4%±5.0%、14.4%±3.0%和48.8%±2.0%、57.5%±6.0%、44.1%±5.0%,PS-SFW0.56对NO3--N和TN的去除效能均优于PS-SFW0.32,并且优于SFW0.HRT为2 d (第82~129天)时,PS-SFW0.32、PS-SFW0.56、SFW0w(NO3--N)为47.7%±7.0%、46.6%±6.0%和26.8%±4.0%,w(TN)为37%±6.0%、36.6%±6.0%和24.0%±3.0%,PS-SFW0.32、PS-SFW0.56对氮的去除效能接近,但仍优于SFW0.研究显示,PS-SFW运行条件应优选S/C为0.56、HRT为4 d.
关键词:  硫碳比  碳硫耦合反硝化  强化脱氮  表流湿地  农田退水
DOI:10.13198/j.issn.1001-6929.2017.03.03
分类号:X
基金项目:国家水体污染控制与治理科技重大专项(2012ZX07105-002)
Influence of Sulfur-to-Carbon Ratio on Nitrogen Removal by Phragmites australis and Sulfur Combined Surface Flow Construction Wetland
CHANG Yang1,2, WANG Haiyan1,2, CHU Zhaosheng1,3, HANG Qianyu1,2, LI Li1,2, HOU Zeying1,3
1. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;2. Research Center for Water Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;3. State Environmental Protection Key Laboratory for Lake Pollution Control, National Engineering Laboratory of Lake Water Pollution Control and Ecological Restoration Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Abstract:
A Phragmites australis and Sulfur Combined Surface Flow Constructed Wetland (PS-SFW) were put forward for treatment of high-Nitrate and low COD/TN (C/N) ratio agricultural runoff, and their feasibility for advanced nitrogen removal of agricultural runoff was extensively studied and compared with a conventional surface flow constructed wetland without P.australis pieces and sulfur packing (SFW0). The study focused on the influence of sulfur/carbon ratio (S/C) on PS-SFW nitrogen removal under 2, 3 and 4 d hydraulic retention time (HRT). The results showed that under 3 d HRT (29-40 d), w(NO3--N) removal of PS-SFW0.32 (0.32 S/C ratio), PS-SFW0.56 (0.56 S/C ratio) and SFW0 were 55.9%±11.0%, 66%±10.0% and 7.0%±3.0%, and w(TN) were 36.9%±1.0%, 40.3%±3.0% and 4.5%±2.0%, respectively. The NO3--N and TN removals of PS-SFW0.56 were higher than those of PS-SFW0.32, and they were both much higher than SFW0. Under 4 d HRT during 41-81 d operation (3 d HRT during 130-149 d operation), w(NO3--N) of PS-SFW0.32, PS-SFW0.56 and SFW0 were 66.3%±5.0%, 90.5%±4.0% and 14.4%±4.0% (53.4%±3.0%, 62.9%±10.0% and 48.5%±5.0%), and w(TN) were 55.5%±5.0%, 75.4%±5.0% and 4.4%±3.0% (48.8%±2.0%, 57.5%±6.0% and 44.1%±5.0%), respectively. Both NO3--N and TN removal of PS-SFW0.56 were higher than those of PS-SFW0.32, and both were much higher than those of SFW0. Under 2 d HRT (82-129 d), w(NO3--N) of PS-SFW0.32, PS-SFW0.56 and SFW0 were 47.7%±7.0%, 46.6%±6.0% and 26.8%±4.0%, and w(TN) were 37%±6.0%, 36.6%±6.0% and 24.0%±3.0%, respectively. The nitrogen removal at 0.56 and 0.32 S/C were similar and much higher than SFW0. Considering the above results, 0.56 S/C and 4 d HRT were selected as the optimal conditions for PS-SFW operation.
Key words:  S/C ratio  plant carbon and sulfur combined denitrification  enhanced nitrogen removal  surface flow wetland  agricultural runoff