A novel shortcut nitrogen removal process using an algal-bacterial consortium in a photo-sequencing batch reactor (PSBR)

Meng Wang, Han Yang, Sarina J. Ergas, Peter van der Steen

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Removal of nitrogen from anaerobically digested swine manure centrate was investigated in a photo-sequencing batch reactor (PSBR) with alternating light and dark periods. Microalgal photosynthesis was shown to provide enough oxygen for complete nitritation during the light period. With addition of an organic carbon source during the dark period, the reactor removed over 90% total nitrogen (TN) without aeration other than by mixing. Overall, 80% of the TN removal was through nitritation/denitritation and the rest was due to biomass uptake. The high concentrations of ammonia and nitrite and low dissolved oxygen concentration in the PSBR effectively inhibited nitrite oxidizing bacteria, resulting in stable nitritation. The hybrid microalgal photosynthesis and shortcut nitrogen removal process has the potential to substantially reduce aeration requirements for treatment of anaerobic digestion side streams. The PSBR also produced well settling biomass with sludge volume index of 62 ± 16 mL mg-1.

Original languageEnglish (US)
Pages (from-to)38-48
Number of pages11
JournalWater Research
Volume87
DOIs
StatePublished - Dec 15 2015

Fingerprint

Nitrogen removal
Batch reactors
Photosynthesis
nitrogen
Biomass
aeration
nitrite
Nitrogen
photosynthesis
Anaerobic digestion
Manures
Dissolved oxygen
Organic carbon
Ammonia
Bacteria
biomass
manure
dissolved oxygen
Oxygen
ammonia

All Science Journal Classification (ASJC) codes

  • Ecological Modeling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

Cite this

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A novel shortcut nitrogen removal process using an algal-bacterial consortium in a photo-sequencing batch reactor (PSBR). / Wang, Meng; Yang, Han; Ergas, Sarina J.; van der Steen, Peter.

In: Water Research, Vol. 87, 15.12.2015, p. 38-48.

Research output: Contribution to journalArticle

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