Fast start-up, performance and microbial community in a pilot-scale anammox reactor seeded with exotic mature granules

Shou Qing Ni*, Bao Yu Gao, Chih Cheng Wang, Jih-Gaw Lin, Shihwu Sung

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

96 Scopus citations

Abstract

The possibility to introduce the exotic anammox sludge to seed the pilot-scale anammox granular reactor and its fast start-up for treating high nitrogen concentration wastewater were evaluated in this study. The reactor was started up successfully in two weeks; in addition, high nitrogen removal was achieved for a long period. Stoichiometry molar ratios of nitrite conversion and nitrate production to ammonium conversion were calculated to be 1.26±0.02:1 and 0.26±0.01:1, respectively. The Stover-Kincannon model which was first applied in granular anammox process indicated that the granular anammox reactor possessed high nitrogen removal potential of 27.8kg/m3/d. The anammox granules in the reactor were characterized via microscope observation and fluorescence in situ hybridization technique. Moreover, the microbial community of the granules was quantified to be composed of 91.4-92.4% anammox bacteria by real-time polymerase chain reaction. This pilot study can elucidate further information for industrial granular anammox application.

Original languageEnglish
Pages (from-to)2448-2454
Number of pages7
JournalBioresource Technology
Volume102
Issue number3
DOIs
StatePublished - 1 Feb 2011

Keywords

  • Anammox granule
  • Exotic sludge
  • Kinetics
  • Molecular technique
  • Start-up

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