TY - JOUR
T1 - Mechanism and design of intermittent aeration activated sludge process for nitrogen removal
AU - Hanhan, Oytun
AU - Insel, Güçlu
AU - Yagci, Nevin Ozgur
AU - Artan, Nazik
AU - Orhon, Derin
PY - 2011/1
Y1 - 2011/1
N2 - The paper provided a comprehensive evaluation of the mechanism and design of intermittent aeration activated sludge process for nitrogen removal. Based on the specific character of the process the total cycle time, (TC), the aerated fraction, (AF), and the cycle time ratio, (CTR) were defined as major design parameters, aside from the sludge age of the system. Their impact on system performance was evaluated by means of process simulation. A rational design procedure was developed on the basis of basic stochiometry and mass balance related to the oxidation and removal of nitrogen under aerobic and anoxic conditions, which enabled selected of operation parameters of optimum performance. The simulation results indicated that the total nitrogen level could be reduced to a minimum level by appropriate manipulation of the aerated fraction and cycle time ratio. They also showed that the effluent total nitrogen could be lowered to around 4.0 mgN/L by adjusting the dissolved oxygen set-point to 0.5 mg/L, a level which promotes simultaneous nitrification and denitrification.
AB - The paper provided a comprehensive evaluation of the mechanism and design of intermittent aeration activated sludge process for nitrogen removal. Based on the specific character of the process the total cycle time, (TC), the aerated fraction, (AF), and the cycle time ratio, (CTR) were defined as major design parameters, aside from the sludge age of the system. Their impact on system performance was evaluated by means of process simulation. A rational design procedure was developed on the basis of basic stochiometry and mass balance related to the oxidation and removal of nitrogen under aerobic and anoxic conditions, which enabled selected of operation parameters of optimum performance. The simulation results indicated that the total nitrogen level could be reduced to a minimum level by appropriate manipulation of the aerated fraction and cycle time ratio. They also showed that the effluent total nitrogen could be lowered to around 4.0 mgN/L by adjusting the dissolved oxygen set-point to 0.5 mg/L, a level which promotes simultaneous nitrification and denitrification.
KW - aerated fraction
KW - biological treatment
KW - cycle time ratio
KW - denitrification potential
KW - Intermittent aeration
KW - nitrogen removal
UR - http://www.scopus.com/inward/record.url?scp=78649508268&partnerID=8YFLogxK
U2 - 10.1080/10934529.2011.526073
DO - 10.1080/10934529.2011.526073
M3 - Article
C2 - 21104491
AN - SCOPUS:78649508268
SN - 1093-4529
VL - 46
SP - 9
EP - 16
JO - Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
JF - Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
IS - 1
ER -
