Correlation Engine 2.0
Clear Search sequence regions

  • ammonium (3)
  • bacteria (7)
  • bioreactors (1)
  • free (6)
  • heat (7)
  • nitrite (6)
  • nitrous acid (8)
  • shock (7)
  • Sizes of these terms reflect their relevance to your search.

    The feasibility of stable nitritation of sludge alternately treated by free nitrous acid (FNA) and heat shock in a sequencing batch reactor (SBR) was investigated in this study. The linear regression method was used to determine the optimal treatment conditions. Results revealed that an FNA concentration of 2.20 mg HNO2-N/L, exposure time of 24 h, and treatment ratio of 20% could inhibit nitrite oxidizing bacteria (NOB) activity to the greatest extent while maintaining the maximum ammonium oxidizing bacteria (AOB) activity; after heat shock at 60 °C for 20 min, NOB were inhibited while AOB still had certain activity. In the long-term continuous-flow experiment, the single FNA or heat shock treatments easily allowed adapt NOB to affect the stability of nitritation. The alternating FNA/heat shock treatment can achieve long-term stability of nitritation. Microbial community analysis revealed that the alternating FNA/heat shock treatment could inhibit NOB while maintaining high AOB abundance. Copyright © 2022 Elsevier Ltd. All rights reserved.


    Chengju Liu, Yanyan Wang, Guanghui Chen, Deshuang Yu, Xincheng Zhang, Xueping Wang, Zhihao Tang, Ao Xu. A novel stable nitritation process: Treating sludge by alternating free nitrous acid/heat shock. Bioresource technology. 2022 Mar;347:126753

    Expand section icon Mesh Tags

    Expand section icon Substances

    PMID: 35081428

    View Full Text