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Simultaneous ammonium and nitrate removal by a modified intermittently aerated sequencing batch reactor (SBR) with multiple filling events

Authors :
Hajsardar Mehdi
Borghei Seyed Mehdi
Hassani Amir Hessam
Takdastan Afshin
Source :
Polish Journal of Chemical Technology, Vol 18, Iss 3, Pp 72-80 (2016)
Publication Year :
2016
Publisher :
Sciendo, 2016.

Abstract

Optimized methods for simultaneous removal of nitrate, nitrite and ammonium are important features of nutrient removal. Nitrogen removal efficiency in an intermittently aerated sequencing batch reactor (IA-SBR) with multiple filling events was studied. No external carbon source was added and three filling events were considered. Oxidationreduction potential (ORP) and pH curve at solids retention time (SRT) of 20 d were analyzed. Effects of three organic loading rates (OLR), 0.67, 1.0 and 1.5 kgCOD/m3d, and three nitrogen loading rates (NLR), 0.054, 0.1 and 0.15 kgN/m3d, on nitrogen removal were studied. Nitrate Apex in pH curve and Nitrate Knee in ORP profile indicated that the end of denitrification would be achieved sooner. The kinetic coefficients of endogenous decay (kd) and yield (Y) were identified to evaluate heterotrophic specific denitrification rate (SDNRb). In period 2 at NLR of 0.054 kgN/m3d and considering 2 anoxic and 3 aerobic phases, nitrogen removal efficiency was 91.43%.

Details

Language :
English
ISSN :
18994741
Volume :
18
Issue :
3
Database :
Directory of Open Access Journals
Journal :
Polish Journal of Chemical Technology
Publication Type :
Academic Journal
Accession number :
edsdoj.284c3ba2f9c8457ca102afaf3f0c08b2
Document Type :
article
Full Text :
https://doi.org/10.1515/pjct-2016-0051