Cultivation of sulfide-driven partial denitrification granules for efficient nitrite generation from nitrate-sulfide-laden wastewater

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Chunshuang Liu
  • Yanzhe Li
  • Jianing Gai
  • Hongzhe Niu
  • Dongfeng Zhao
  • Aijie Wang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number150143
Journal / PublicationScience of the Total Environment
Volume804
Online published7 Sep 2021
Publication statusPublished - 15 Jan 2022

Abstract

Sulfide partial denitrification (SPD) is an alternative pathway for nitrite production accompanied with elemental sulfur (S0) production for nitrate removal from wastewater with anammox. In this study, the SPD granular sludge was cultivated for the first time in an upflow anaerobic sludge bed (UASB) reactor to reach the efficacy of maximum nitrate-to-nitrite transformation ratio of 92% and an in-situ maximum NO3-N reduction rate of 2.46 kg-N/m3-d, both much higher than literature results. Mature granules had an average particle size of 2.52 mm and hold smooth surface with excess rod bacteria. The elements Ca and S, and proteins in extracellular polymeric substances contributed to granule structure's stability. Enriched Thiobacillus genus was proposed to accumulate nitrite at moderate HRT (2–6 h). The immobilized functional strains assist efficient partial nitrification reactions to be realized with formed S0 as byproduct.

Research Area(s)

  • Elemental sulfur, Extracellular polymeric substances, Granulation, Nitrite production, Sulfide partial denitrification

Citation Format(s)

Cultivation of sulfide-driven partial denitrification granules for efficient nitrite generation from nitrate-sulfide-laden wastewater. / Liu, Chunshuang; Li, Yanzhe; Gai, Jianing; Niu, Hongzhe; Zhao, Dongfeng; Wang, Aijie; Lee, Duu-Jong.

In: Science of the Total Environment, Vol. 804, 150143, 15.01.2022.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review