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Sequenced aeration in a membrane bioreactor: Specific nitrogen removal rates
Author(s) -
Pellegrin MarieLaure,
TaziPain Annie,
Buisson Hervé,
Wisniewski Christelle,
Grasmick Alain
Publication year - 2002
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450800307
Subject(s) - nitrification , membrane bioreactor , autotroph , denitrification , aeration , bioreactor , wastewater , heterotroph , organic matter , simultaneous nitrification denitrification , population , environmental chemistry , chemistry , phosphorus , environmental engineering , nitrogen , pulp and paper industry , environmental science , biology , bacteria , organic chemistry , genetics , demography , sociology , engineering
The aim of this work was to quantify the activity of autotrophic and heterotrophic populations present in a submerged membrane bioreactor submitted to a sequenced aeration, ensuring alternate nitrification and denitrification (BIOSEP® process). Specific nitrification and denitrification rates were determined over a fifteen‐month running period, with and without physico‐chemical phosphorus removal. The results show (i) zero‐order kinetics; (ii) a specific activity independent of MLVSS concentration; and (iii) an evolution of the nitrification kinetics directly linked to an evolution of the nitrifying population within the unit. The study confirmed that denitrification kinetics depend on the concentration and on the nature of wastewater organic matter.