NH4+ ad-/desorption in sequencing batch reactors: simulation, laboratory and full-scale studies
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In: Water Science and Technology, Vol. 58, No. 2, 01.08.2008, p. 345-350.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - NH4+ ad-/desorption in sequencing batch reactors
T2 - simulation, laboratory and full-scale studies
AU - Schwitalla, P.
AU - Mennerich, Artur
AU - Austermann-Haun, Ute
AU - Müller, Anneliese
AU - Gruber-Dorninger, Christiane
AU - Daims, Holger
AU - Holm, Niels C.
AU - Rönner-Holm, Sabine G. E.
PY - 2008/8/1
Y1 - 2008/8/1
N2 - Significant NH 4-N balance deficits were found during the measurement campaigns for the data collection for dynamic simulation studies at five full-scale sequencing batch reactor (SBR) waste water treatment plants (WWTPs), as well as during subsequent calibrations at the investigated plants. Subsequent lab scale investigations showed high evidence for dynamic, cycle- specific NH + 4 adVdesorption to the activated flocs as one reason for this balance deficit. This specific dynamic was investigated at five full-scale SBR plants for the search of the general causing mechanisms. The general mechanism found was a NH + 4 desorption from the activated flocs at the end of the nitrification phase with subsequent nitrification and a chemical NH + 4 adsorption at the flocs in the course of the filling phases. This NH + 4 adVdesorption corresponds to an antiparallel K + ad/-desorption. One reasonable full-scale application was investigated at three SBR plants, a controlled filling phase at the beginning of the sedimentation phase. The results indicate that this kind of filling event must be specifically hydraulic controlled and optimised in order to prevent too high waste water break through into the clear water phase, which will subsequently be discarded.
AB - Significant NH 4-N balance deficits were found during the measurement campaigns for the data collection for dynamic simulation studies at five full-scale sequencing batch reactor (SBR) waste water treatment plants (WWTPs), as well as during subsequent calibrations at the investigated plants. Subsequent lab scale investigations showed high evidence for dynamic, cycle- specific NH + 4 adVdesorption to the activated flocs as one reason for this balance deficit. This specific dynamic was investigated at five full-scale SBR plants for the search of the general causing mechanisms. The general mechanism found was a NH + 4 desorption from the activated flocs at the end of the nitrification phase with subsequent nitrification and a chemical NH + 4 adsorption at the flocs in the course of the filling phases. This NH + 4 adVdesorption corresponds to an antiparallel K + ad/-desorption. One reasonable full-scale application was investigated at three SBR plants, a controlled filling phase at the beginning of the sedimentation phase. The results indicate that this kind of filling event must be specifically hydraulic controlled and optimised in order to prevent too high waste water break through into the clear water phase, which will subsequently be discarded.
KW - Sustainability sciences, Communication
KW - dynamic simulation
KW - NH4+ adsorption
KW - nitrogen removal
KW - process control
KW - SBR
KW - Dynamic simulation
KW - NH+ 4 adsorption
KW - Nitrogen removal
KW - Process control
KW - SBR
UR - http://www.scopus.com/inward/record.url?scp=52949103321&partnerID=8YFLogxK
U2 - 10.2166/wst.2008.388
DO - 10.2166/wst.2008.388
M3 - Journal articles
C2 - 18701784
VL - 58
SP - 345
EP - 350
JO - Water Science and Technology
JF - Water Science and Technology
SN - 0273-1223
IS - 2
ER -