期刊文献+

硫自养与异养混合亚硝酸盐反硝化过程铵生成机制

Ammonia production mechanism in a simultaneous occurrence of sulfur autotrophic and heterotrophic mixed nitrite denitrification process
收藏 分享 导出
摘要 为研究亚硝酸盐型碳、氮、硫同步脱除系统的特性,采用SBBR,以亚硝酸盐、硫化物及乙酸钠为基质,探索6种进水COD/N及5种进水S/N下碳、硫混合亚硝酸盐反硝化过程铵的生成机制。结果表明:在进水COD/N高于2、S/N高于1时,NO2--N去除率高达99%;同时,当氧化还原电位(ORP)低于-400 mV时,会出现铵浓度明显升高现象,在此条件下,进水COD/N不变时,较高的S/N会促进铵的生成;控制进水S/N不变,COD/N为3时铵浓度升高最为明显。微生物分析结果表明,该碳、氮、硫混合体系中同时存在硫自养反硝化、异养反硝化及亚硝酸盐异化还原为铵等过程,碳、硫混合亚硝酸盐反硝化过程铵的生成机制可能是低氧化还原电位和过量电子供体存在的情况下亚硝酸盐异化还原为铵的过程。 In this study,the ammonia production mechanism by a simultaneous autotrophic and heterotrophic(mixotrophic)denitrification process was identified in a sequencing batch biofilm reactor(SBBR)fed with nitrite,sulfide and sodium acetate supplementation,and six different COD/N ratios and five different S/N ratios were designed for this purpose.The result showed that the nitrite removal efficiency was up to 99%when COD/N ratio was higher than 2 and S/N ratio was higher than 1.The increase of ammonia concentration occurred when ORP was lower than-400 mV,and high S/N ratio could enhance the ammonia production with a constant COD/N ratio in influent.While at constant S/N ratio and COD/N ratio of 3,a significant increase of ammonia yield occurred.The microbial analysis showed that sulfur autotrophic denitrification,heterotrophic denitrification as well as dissimilatory nitrite reduction to ammonia were coexisted in this carbon-nitrogen-sulfur synchronous mixing system,in which the ammonia production mechanism may be the process of dissimilatory nitrite reduction to ammonia in the presence of low redox potential and excess electron donor.
作者 刘双 赵剑强 王莎 兰兰 李晓玲 芦昭霖 LIU Shuang;ZHAO Jianqiang;WANG Sha;LAN Lan;LI Xiaoling;LU Zhaolin(School of Environmental Science and Engineering,Chang′an University,Xi′an 710064,China)
出处 《环境工程学报》 CAS CSCD 北大核心 2019年第6期1366-1373,共8页 Chinese Journal of Environmental Engineering
基金 国家自然科学基金资助项目(51778057).
关键词 混合反硝化 异化亚硝酸盐还原为铵 COD/N S/N mixotrophic denitrification dissimilatory nitrite reduction to ammonia COD/N S/N
作者简介 第一作者:刘双(1993—),女,硕士研究生。研究方向:水污染与控制。E-mail:416430937@qq.com;通信作者:赵剑强(1963—),男,博士,教授。研究方向:水污染与控制等。E-mail:626710287@qq.com
  • 相关文献

参考文献5

二级参考文献21

  • 1封克,殷士学,.影响氧化亚氮形成与排放的土壤因素[J].土壤学进展,1995,23(6):35-42. 被引量:93
  • 2Lens P N L, Visser A, Janssen A J H et al. Biotechnological treatment of sulfate-rich wastewaters [J]. Critical Reviews in Environmental Science and Technology, 1998, 28(1):41-88. 被引量:1
  • 3Qaisar M, Zheng P, Cai J et al. Sources of sulfide in waste streams and current biotechnologies for its removal [J]. Journal of Zhejiang University, Seienee A, 2007, 8(7): 1126-1140. 被引量:1
  • 4Krishnakumar B, Manilal V B. Bacterial oxidation of sulphide under denitrifying conditions [J]. Bioteehnology Letters, 1999, 21(5): 437-440. 被引量:1
  • 5Qaisar M, Zheng P, Cai Jet al. Anoxic sulfide biooxidation using nitrite as electron acceptor [J]. Journal of Hazardous Materials, 2007, 147(1-2): 249-256. 被引量:1
  • 6Percheron G, Michaud S, Bet-net Net al. Nitrate and nitrite reduction of a sulphide-rich environment [J]. Journal of Chemical Technology and Biotechnology, 1998, 72(3): 213-220. 被引量:1
  • 7State Environmental Protection Administration of China(国家环保局).Method of Water and Wastewater (3rd edition)(水和废水监测分析方法(第三版))[M].Beijing(北京):China Environmental Science Press(中国环境科学出版社),1997. 被引量:1
  • 8Chemistry Department of Nanjing University(南京大学无机及分析化学编写组).Inorganic and Analytical Chemistry(无机及分析化学)[M].Beijing(北京):Higher Education Press(高等教育出版社),2001. 被引量:1
  • 9Camargo J A, Alonso A. Ecological and toxicological effects of inorganic nitrogen pollution in aquatic ecosystems: A global assessment [J]. Environment International, 2006, 32(6): 831-849. 被引量:1
  • 10ZHENG Ping(郑平),FENG Xiao-shan(冯孝善).Biotechnology for Wastes Treatment(废物生物处理)[M].Beijing(北京):Higher Education Press(高等教育出版社),2006. 被引量:1

共引文献4

投稿分析

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈