TY - GEN
T1 - Study on stability and influencing factors of nitrite accumulation in biological aerated filter
AU - Zhang, Shoubin
AU - Du, Maoan
AU - Zhai, Xuedong
AU - Ma, Jun
AU - Qiu, Liping
PY - 2011
Y1 - 2011
N2 - Study was made on stability and influencing factors of nitrite accumulation in Biological Aerated Filter (BAF) treating simulated municipal wastewater. The possibility of shortcut nitrification-denitrification in low ammonia wastewater treatment was discussed. The mode of natural start-up was favorable to the nitrite accumulation in BAF and the highest nitrite accumulation rate was over 80%. By adjusting pH, nitrite accumulation can take place in BAF. When the influent pH value was 6.5 to 7, the highest nitrite accumulation rate was 57%. But long-term stable nitrite accumulation cannot be obtained only through changing influent pH value. The lower concentration of DO was of advantage to the formation of the nitrite accumulation. When the concentration of DO was controlled to less than 0.5 mg/L, the nitrite accumulation rate can improved significantly to the maximum over 80%. The increasing of hydraulic loading can contribute to nitrite accumulation. When the hydraulic loading was enhanced to 10 m3/(m2·h), the average nitrite accumulation rate can be increased by 52.5 times. The increasing of influent ammonia loading cannot improve nitrite accumulation notably. When influent pH was 6.5 to 7, concentration of DO was 1.0 to 1.5 and the filtration rate was 5 m/h, the nitrite accumulation of BAF reactor was of good stability. During 60 days' running, the nitrite accumulation can keep at 65% to 75% stably and obvious shortcut nitrification-denitrification was found.
AB - Study was made on stability and influencing factors of nitrite accumulation in Biological Aerated Filter (BAF) treating simulated municipal wastewater. The possibility of shortcut nitrification-denitrification in low ammonia wastewater treatment was discussed. The mode of natural start-up was favorable to the nitrite accumulation in BAF and the highest nitrite accumulation rate was over 80%. By adjusting pH, nitrite accumulation can take place in BAF. When the influent pH value was 6.5 to 7, the highest nitrite accumulation rate was 57%. But long-term stable nitrite accumulation cannot be obtained only through changing influent pH value. The lower concentration of DO was of advantage to the formation of the nitrite accumulation. When the concentration of DO was controlled to less than 0.5 mg/L, the nitrite accumulation rate can improved significantly to the maximum over 80%. The increasing of hydraulic loading can contribute to nitrite accumulation. When the hydraulic loading was enhanced to 10 m3/(m2·h), the average nitrite accumulation rate can be increased by 52.5 times. The increasing of influent ammonia loading cannot improve nitrite accumulation notably. When influent pH was 6.5 to 7, concentration of DO was 1.0 to 1.5 and the filtration rate was 5 m/h, the nitrite accumulation of BAF reactor was of good stability. During 60 days' running, the nitrite accumulation can keep at 65% to 75% stably and obvious shortcut nitrification-denitrification was found.
KW - Biological aerated filter
KW - Nitrite accumulation
KW - Shortcut nitrification-denitrification
UR - https://www.scopus.com/pages/publications/79955830723
U2 - 10.1109/CDCIEM.2011.429
DO - 10.1109/CDCIEM.2011.429
M3 - 会议稿件
AN - SCOPUS:79955830723
SN - 9780769543505
T3 - Proceedings - International Conference on Computer Distributed Control and Intelligent Environmental Monitoring, CDCIEM 2011
SP - 1793
EP - 1796
BT - Proceedings - International Conference on Computer Distributed Control and Intelligent Environmental Monitoring, CDCIEM 2011
T2 - 2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring, CDCIEM 2011
Y2 - 19 February 2011 through 20 February 2011
ER -