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Evaluation of predominant factor for shortcut biological nitrogen removal in sequencing batch reactor at ambient temperature

  • Wookeun Bae
  • Seungjin Kim
  • Seongjun Park
  • Hodon Ryu
  • Jinwook ChungEmail author
Research Paper
  • 30 Downloads

Abstract

The shortcut biological nitrogen removal (SBNR) process requires less aeration and external carbon due to the oxidization of ammonia into nitrite and its direct denitrification to nitrogen gas during the biological nitrogen removal process. However, this process produces a poor effluent containing NH4+, since the system has to maintain a high free ammonia (FA, NH3) concentration. To overcome this drawback, in this study, the solid retention time (SRT) and the dissolved oxygen (DO) concentration were controlled to achieve both a high ammonia removal rate and nitrite accumulation in the sequencing batch reactor (SBR) process, which can remove nitrogen from wastewater to the desired concentration and provide high free ammonia inhibition and continuous shock loading. When sufficient DO was supplied, nitrite did not accumulate with a 20-day SRT, but the wash-out of nitrite oxidizers in a shorter SRT resulted in a high nitrite accumulation. When DO acted as a limitation, nitrite accumulated at all SRTs. This indicates that nitrite accumulation is more highly influenced by SRT and DO concentration than by FA inhibition. Also, as nitrite accumulated over a 10-day SRT regardless of DO concentration, the accumulation was more highly influenced by SRT than by DO concentration.

Keywords

Dissolved oxygen (DO) Free ammonia Shortcut biological nitrogen removal (SBNR) Sequencing batch reactor (SBR) Solid retention time (SRT) 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interests.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Wookeun Bae
    • 1
  • Seungjin Kim
    • 1
    • 2
  • Seongjun Park
    • 1
  • Hodon Ryu
    • 3
  • Jinwook Chung
    • 2
    Email author
  1. 1.Department of Civil and Environmental EngineeringHanyang UniversityAnsanRepublic of Korea
  2. 2.R&D CenterSamsung Engineering Co., Ltd.SuwonRepublic of Korea
  3. 3.National Science Foundation Water Quality Center, Department of Civil and Environmental EngineeringArizona State UniversityTempeUSA

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