Statistical analysis and optimization of simultaneous biological nutrients removal process in an intermittently aerated SBR

Amir Mohammad Mansouri; Ali Akbar Zinatizadeh; Mohsen Irandoust; Aazam Akhbari

Korean Journal of Chemical Engineering, Vol.31, No.1, 88-97, January, 2014

DOI10.1007/s11814-013-0183-8 Export Citation

Statistical analysis and optimization of simultaneous biological nutrients removal process in an intermittently aerated SBR

Amir Mohammad Mansouri, Ali Akbar Zinatizadeh^{1, †}, Mohsen Irandoust, and Aazam Akhbari

Department of Analytical Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran
¹Water and Wastewater Research Center (WWRC), Department of Applied Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran

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Simultaneous removal of carbon and nutrients from a synthetic wastewater in aerobic/anoxic sequence batch reactor (SBR) was investigated. The experiments were conducted based on a central composite design (CCD) and analyzed using response surface methodology (RSM). Two significant independent variables, cycle time and aeration time, were studied to analyze the process. Five dependent parameters--total COD (TCOD) removal, total nitrogen removal, total phosphorus removal, total Kjeldahl nitrogen removal and effluent nitrate concentration--were monitored as the process responses. The region of exploration for the process was taken as the area enclosed by cycle times (2, 4.25 and 6.5 h) and aeration times (30, 40 and 50 min/h) boundaries. The maximum COD (87.18%) and TKN (78.94%) removal efficiencies were obtained at the cycle time and aeration time of 6.5 h and 50 min/h, respectively. While the maximum TN (71.15%) and phosphorus (68.91%) removal efficiencies were obtained at cycle time of 6.5 h and aeration time of 40min/h. As a result, high cycle time (6.5 h) and moderate aeration time(40min/h) were found to be the optimal region for maximum carbon and nitrogen removal efficiencies.

Keywords:Intermittently Aerated SBR;Operating Variables;Nutrients Removal;RSM;Process Analysis;Synthetic Wastewater

[References]

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[Referenced By]

[1] Kargi F, Uygur A, Enzyme Microb. Technol., 31(6), 842 (2002)

[2] Ramirez CN, Martinez SG, Bioprocess Eng., 23, 143 (2000)

[3] Moawad A, Mahmoud UF, El-Khateeb MA, El-Molla E, Desalination, 242(1-3), 325 (2009)

[4] Neczaj E, Okoniewska E, Kacprzak M, Desalination, 185(1-3), 357 (2005)

[5] Ra CS, Lo KV, Shin JS, Oh JS, Hong BJ, Water Res., 34, 965 (2000)

[6] Li J, Healy MG, Zhan X, Norton D, Rodger M, Water Air Soil Pollut., 192, 251 (2008)

[7] Arun V, Mion T, Mastsuo T, Water Res., 22, 565 (1988)

[8] Fikret K, Isil K, J. Environ. Manage., 84, 20 (2007)

[9] Chiemchaisri C, Enhancement of organic oxidation and nitrogen removal in membrane separation bioreactor for domestic wastewater treatment, Department of Urban Engineering, University of Tokyo, PhD Thesis (1993)

[10] Seo IS, Lee SI, J. KSEE., 17, 637 (1995)

[11] Nazik A, Derin O, Mechanism and design of sequencing batch reactors for nutrient removal, London, IWA (2005)

[12] Jian Y, Guokai F, Guangming Z, China Water & WasteWater., 24, 105 (2008)

[13] Hongfang M, Xiufeng C, Journal of Zhengzhou University (Engineering Science)., 29, 102 (2008)

[14] Junjun C, Wei L, Enrong XI, Zhenbin WU, J. Natural Science., 15, 455 (2010)

[15] Shahrezaei F, Mansouri Y, Zinatizadeh AAL, Akhbari A, Powder Technol., 221, 203 (2012)

[16] Zinatizadeh AAL, Mohamed AR, Abdullah AZ, Mashitah MD, Isa MH, Najafpour GD, Water Res., 40, 3193 (2006)

[17] Mansouri Y, Zinatizadeh AA, Mohammadi P, Irandoust M, Akhbari A, Davoodi R, Korean J. Chem. Eng., 29(7), 891 (2012)

[18] Khuri AI, Cornell JA, Response surfaces, design and analyses, 2nd Ed., Marcel Dekker Inc., New York (1996)

[19] Montgomery DC, Design and analysis of experiments, 3nd Ed., Wiley, New York (1991)

[20] Mason RL, Gunst RF, Hess JL, Statistical Design and Analysis of Experiments, Eighth Applications to Engineering and Science, 2nd Ed., Wiley, New York (2003)

[21] APHA, Standard methods for the examination of water and wastewater, 19th Ed. American Public Health Association, Washington, DC (1999)

[22] Kuehl, Design of experiments: statistical principles of research design and analysis, Second Ed. Duxbury Press, Pacific Grove, 2 (2000)

[23] Ahmad AL, Ismail S, Bhatia S, Environ. Sci. Technol., 8, 2828 (2005)

[24] Krumins V, Hummerick M, Levine L, Strayer R, Adams JL, Bauer J, Bioresour. Technol., 85(3), 243 (2002)

[25] Diez MC, Castillo G, Aguilar L, Vidal G, Mora ML, Bioresour. Technol., 83(2), 131 (2002)

[26] Pochana K, Keller J, Water Sci. Technol., 39, 61 (1999)

[27] Dong WY, Wang HJ, Li WG, Ying WC, Gan GH, Yang Y, J. Membr. Sci., 344(1-2), 219 (2009)

[28] Li B, Irvin S, J. Biochem. Eng., 34, 248 (2007)

[29] Wang Y, Huang X, Yuan Q, Process Biochem., 40, 1733 (2005)

[30] Hasar H, Klnacl C, UnRi A, Ipek U, Desalination., 142, 287 (2001)

[31] Scheumann R, Kraume M, Desalination, 246(1-3), 444 (2009)

[32] Jones PH, Tadwalker AD, Hsu CL, Water Res., 21, 301 (1987)

[33] Tchobanoglous G, Burton FL, Stensel HD, Treatment and reuse, Wastewater Engineering, 4th Ed., McGraw Hill, New York (2003)