The mechanisms of partial nitrification in sequencing batch reactor was studied under the condition of AOB oxygen affinity lower than NOB by calibrating the kinetic parameters of nitrification accurately. The measured DO half saturation constants for AOB and NOB were 0.46 and 0.14mg O2/L respectively. Under the condition, the higher AOB specific growth rate than NOB was an important feature for achieving partial nitrification. The AOB and NOB specific growth rates were measured at 0.65 and 0.45 d-1 respectively. The two-step nitrification model simulation indicated that the low DO and high SRT (sludge retention time) conditions were detrimental for achieving partial nitrification, which could be more readily achieved under the combined condition of relative high DO and low SRT. The experimental result verified the simulation results.
Peng Y, Zhu G, Biological nitrogen removal with nitrification and denitrification via nitrite pathway.[J]. Applied Microbiology and Biotechnology, 2006,73(1):15-26.
[2]
Perez J, et al. Outcompeting nitrite-oxidizing bacteria in single-stage nitrogen removal in sewage treatment plants:A model-based study.[J]. Water Research, 2014,66:208-218.
Guisasola A, et al. Respirometric estimation of the oxygen affinity constants for biological ammonium and nitrite oxidation.[J]. Journal of Chemical Technology and Biotechnology, 2005, 80(4):388-396.
[5]
Manser R W, Gujer and H Siegrist. Consequences of mass transfer effects on the kinetics of nitrifiers.[J]. Water Research, 2005,39(19):4633-4642.
[6]
Regmi P, et al. Control of aeration, aerobic SRT and COD input for mainstream nitritation/denitritation.[J]. Water Research, 2014, 57:162-171.
[7]
Daebel H R, Manser and W Gujer. Exploring temporal variations of oxygen saturation constants of nitrifying bacteria.[J]. Water Research, 2007,41(5):1094-1102.
[8]
Wu J, et al. New insights in partial nitrification start-up revealed by a model based approach.[J]. RSC Advances, 2015,5(121):100299-100308.
[9]
Wu J and C He. Effect of cyclic aeration on fouling in submerged membrane bioreactor for wastewater treatment.[J]. Water Research, 2012,46(11):3507-3515.
[10]
AWWA.[M]. Standard Methods for the Examination of Water and Wastewater. 21st ed. 2005:American Water Works Association.
[11]
Henze M, et al.[M]. Activated Sludge Models:ASM1, ASM2, ASM2d and ASM32000, London:IWA Publishing.
[12]
van Dongen U, M S Jetten, M C van Loosdrecht. The SHARON-Anammox process for treatment of ammonium rich wastewater.[J]. Water Science and Technology, 2001,44(1):153-60.
[13]
Dytczak M A, Londry K L, Oleszkiewicz J A. Activated sludge operational regime has significant impact on the type of nitrifying community and its nitrification rates.[J]. Water Research, 2008, 42:2320-2328.
[14]
Hellinga C, van Loosdrecht M C M, Heijnen J J. Model Based Design of a Novel Process for Nitrogen Removal from Concentrated Flows.[J]. Mathematical and Computer Modelling of Dynamical Systems, 1999,5(4):351-371.
[15]
Wu Jun, He Chengda, Mark C M, et al. Selection of ammonium oxidizing bacteria (AOB) over nitrite oxidizing bacteria (NOB) based on conversion rates.[J]. Chemical Engineering Journal, 2016,304:953-961.
[16]
Reino C, Suárez-Ojeda M E, Pérez J, et al. Kinetic and microbiological characterization of aerobic granules performing partial nitritation of a low-strength wastewater at 10 C.[J]. Water Research, 2016,101:147-156.
[17]
Pollice A, Tandoi V, Lestingi C. Influence of aeration and sludge retention time on ammonium oxidation to nitrite and nitrate.[J]. Water Research, 2002,36(10):2541-2546.
[18]
Jubany I, Lafuente J, Baeza J A, et al. Total and stable washout of nitrite oxidizing bacteria from a nitrifying continuous activated sludge system using automatic control based on Oxygen Uptake Rate measurements. 2009,[J]. Water Research 43(11):2761-2772.
[19]
Jemaat Z, Bartroli A, Isanta E, et al. Closed-loop control of ammonium concentration in nitritation:Convenient for reactor operation but also for modeling.[J]. Bioresource Technology, 2013,128:655-663.
[20]
Isanta E, Reino C, Carrera J, et al. Stable partial nitritation for low-strength wastewater at low temperature in an aerobic granular reactor.[J]. Water Research, 2015,80:149-158.
[1]
Peng Y, Zhu G, Biological nitrogen removal with nitrification and denitrification via nitrite pathway.[J]. Applied Microbiology and Biotechnology, 2006,73(1):15-26.
[2]
Perez J, et al. Outcompeting nitrite-oxidizing bacteria in single-stage nitrogen removal in sewage treatment plants:A model-based study.[J]. Water Research, 2014,66:208-218.
Guisasola A, et al. Respirometric estimation of the oxygen affinity constants for biological ammonium and nitrite oxidation.[J]. Journal of Chemical Technology and Biotechnology, 2005, 80(4):388-396.
[5]
Manser R W, Gujer and H Siegrist. Consequences of mass transfer effects on the kinetics of nitrifiers.[J]. Water Research, 2005,39(19):4633-4642.
[6]
Regmi P, et al. Control of aeration, aerobic SRT and COD input for mainstream nitritation/denitritation.[J]. Water Research, 2014, 57:162-171.
[7]
Daebel H R, Manser and W Gujer. Exploring temporal variations of oxygen saturation constants of nitrifying bacteria.[J]. Water Research, 2007,41(5):1094-1102.
[8]
Wu J, et al. New insights in partial nitrification start-up revealed by a model based approach.[J]. RSC Advances, 2015,5(121):100299-100308.
[9]
Wu J and C He. Effect of cyclic aeration on fouling in submerged membrane bioreactor for wastewater treatment.[J]. Water Research, 2012,46(11):3507-3515.
[10]
AWWA.[M]. Standard Methods for the Examination of Water and Wastewater. 21st ed. 2005:American Water Works Association.
[11]
Henze M, et al.[M]. Activated Sludge Models:ASM1, ASM2, ASM2d and ASM32000, London:IWA Publishing.
[12]
van Dongen U, M S Jetten, M C van Loosdrecht. The SHARON-Anammox process for treatment of ammonium rich wastewater.[J]. Water Science and Technology, 2001,44(1):153-60.
[13]
Dytczak M A, Londry K L, Oleszkiewicz J A. Activated sludge operational regime has significant impact on the type of nitrifying community and its nitrification rates.[J]. Water Research, 2008, 42:2320-2328.
[14]
Hellinga C, van Loosdrecht M C M, Heijnen J J. Model Based Design of a Novel Process for Nitrogen Removal from Concentrated Flows.[J]. Mathematical and Computer Modelling of Dynamical Systems, 1999,5(4):351-371.
[15]
Wu Jun, He Chengda, Mark C M, et al. Selection of ammonium oxidizing bacteria (AOB) over nitrite oxidizing bacteria (NOB) based on conversion rates.[J]. Chemical Engineering Journal, 2016,304:953-961.
[16]
Reino C, Suárez-Ojeda M E, Pérez J, et al. Kinetic and microbiological characterization of aerobic granules performing partial nitritation of a low-strength wastewater at 10 C.[J]. Water Research, 2016,101:147-156.
[17]
Pollice A, Tandoi V, Lestingi C. Influence of aeration and sludge retention time on ammonium oxidation to nitrite and nitrate.[J]. Water Research, 2002,36(10):2541-2546.
[18]
Jubany I, Lafuente J, Baeza J A, et al. Total and stable washout of nitrite oxidizing bacteria from a nitrifying continuous activated sludge system using automatic control based on Oxygen Uptake Rate measurements. 2009,[J]. Water Research 43(11):2761-2772.
[19]
Jemaat Z, Bartroli A, Isanta E, et al. Closed-loop control of ammonium concentration in nitritation:Convenient for reactor operation but also for modeling.[J]. Bioresource Technology, 2013,128:655-663.
[20]
Isanta E, Reino C, Carrera J, et al. Stable partial nitritation for low-strength wastewater at low temperature in an aerobic granular reactor.[J]. Water Research, 2015,80:149-158.
