SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (11): 1888-1893.DOI: 10.1016/j.cjche.2015.08.014

• 能源、资源与环境技术 • 上一篇    下一篇

Long-term nitritation performance of ammonium-rich landfill leachate

Hongwei Sun1,2, Xintao LÜ1, Yongzhen Peng2, Shuying Wang2, Juan Ma1,2   

  1. 1 School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;
    2 Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
  • 收稿日期:2014-04-29 修回日期:2015-02-03 出版日期:2015-11-28 发布日期:2015-12-18
  • 通讯作者: Hongwei Sun
  • 基金资助:

    Supported by the National Natural Science Foundation of China (51168028, 51168027) and the Science and Technique Foundation Project for Youth of Gansu Province (1107RJYA279) (No. 145RJZA093).

Long-term nitritation performance of ammonium-rich landfill leachate

Hongwei Sun1,2, Xintao LÜ1, Yongzhen Peng2, Shuying Wang2, Juan Ma1,2   

  1. 1 School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;
    2 Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
  • Received:2014-04-29 Revised:2015-02-03 Online:2015-11-28 Published:2015-12-18
  • Contact: Hongwei Sun
  • Supported by:

    Supported by the National Natural Science Foundation of China (51168028, 51168027) and the Science and Technique Foundation Project for Youth of Gansu Province (1107RJYA279) (No. 145RJZA093).

摘要: This study presents a biological system combined upflow anaerobic sludge bed (UASB) with sequencing batch reactor (SBR) to treat ammonium-rich landfill leachate. The start-up and operation of the nitritation at low temperatures were investigated. The synergetic interaction of free ammonia (FA) inhibition on nitriteoxidizing bacteria (NOB) and process control was used to achieve nitritation in the SBR. It is demonstrated that nitritation was successfully started up in the SBR at low temperatures (14.0 ℃-18.2 ℃) by using FA inhibition coupled with process control, and then was maintained for 482 days at normal/low temperature. Although ammonia-oxidizing bacteria (AOB) and NOB co-existed within bacterial clusters in the SBR sludge, AOB were confirmed to be dominant nitrifying population species by scanning electron microscopic (SEM) observation and fluorescence in situ hybridization (FISH) analysis. This confirmation not only emphasized that cultivating the appropriate bacteria is essential for achieving stable nitritation performance, but it also revealed that NOB activity was strongly inhibited by FA rather than being eliminated altogether from the system.

关键词: Landfill leachate, Nitritation, Low temperature, Free ammonia, AOB and NOB

Abstract: This study presents a biological system combined upflow anaerobic sludge bed (UASB) with sequencing batch reactor (SBR) to treat ammonium-rich landfill leachate. The start-up and operation of the nitritation at low temperatures were investigated. The synergetic interaction of free ammonia (FA) inhibition on nitriteoxidizing bacteria (NOB) and process control was used to achieve nitritation in the SBR. It is demonstrated that nitritation was successfully started up in the SBR at low temperatures (14.0 ℃-18.2 ℃) by using FA inhibition coupled with process control, and then was maintained for 482 days at normal/low temperature. Although ammonia-oxidizing bacteria (AOB) and NOB co-existed within bacterial clusters in the SBR sludge, AOB were confirmed to be dominant nitrifying population species by scanning electron microscopic (SEM) observation and fluorescence in situ hybridization (FISH) analysis. This confirmation not only emphasized that cultivating the appropriate bacteria is essential for achieving stable nitritation performance, but it also revealed that NOB activity was strongly inhibited by FA rather than being eliminated altogether from the system.

Key words: Landfill leachate, Nitritation, Low temperature, Free ammonia, AOB and NOB