[1] Zhu Guibing, Peng Yongzhen, Wang Shuying, et al. Comparative study of two biological nitrogen removal processes:A/O process and step-feeding process [J]. Journal of Southeast University (English Edition), 2008, 24 (4): 528-531. [doi:10.3969/j.issn.1003-7985.2008.04.026]

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Comparative study of two biological nitrogen removal processes:A/O process and step-feeding process()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

24

Issue:

2008 4

Page:

528-531

Research Field:

Environmental Science and Engineering

Publishing date:

2008-12-30

Info

Title:

Comparative study of two biological nitrogen removal processes:A/O process and step-feeding process

Author(s):

Zhu Guibing¹;  2;  Peng Yongzhen¹;  3;  Wang Shuying³;  Ma Bin¹

¹School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
²State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
³Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100022, China

Keywords:

activated sludge;  biological nitrogen removal;  A/O process;  step-feeding process;  efficiency

PACS:

X505

DOI:

10.3969/j.issn.1003-7985.2008.04.026

Abstract:

Two biological nitrogen removal processes are compared in the aspect of nitrogen removal, process operation and energy saving.Results show that when the returned sludge ratio is 50% of the inflow rate, the step-feeding process achieves over 80% total nitrogen(TN)removal efficiency, but the TN removal efficiency of the A/O process is only 40%.Moreover, filamentous sludge bulking can be well restrained in the step-feeding process.Given the conditions of a returned sludge ratio of 100% and a nitrifying liquor recycle ratio of 200%, the TN removal efficiency is 78.32% in the A/O process, but the sludge volume index(SVI)value increases to 143 mL/g.In the step-feeding process, the SVI is only 94.4 mL/g when the TN removal efficiency reaches 81.1%.The step-feeding process has distinct advantages over the A/O process in the aspects of practicability, nitrogen removal and operating stability.

References:

[1] Zhu Guibing, Peng Yongzhen.Biological phosphorus removal—manual for design and operation [M].Beijing:China Architecture and Building Press, 2005.
[2] Ma Yong, Peng Yongzhen, Wang Shuying, et al.Fuzzy control of nitrate recirculation and external carbon addition in A/O nitrogen removal process [J].Chinese Journal of Chemical Engineering, 2005, 13(2):244-249.
[3] Larrea L, Larrea A, Ayesa E, et al.Development and verification of design and operation criteria for the step feed process with nitrogen removal [J].Wat Sci Tech, 2001, 43(1):261-268.
[4] Zhu Guibing, Peng Yongzhen, Wang Shuying, et al.Effect of influent flow rate distribution on the performance of step-feed biological nitrogen removal process[J].Chemical Engineering Journal, 2007, 131(1/2/3):319-328.
[5] Kayser R, Stobbe G, Werner M.Operational results of the Wolfsburg wastewater treatment plant[J].Wat Sci Tech, 1992, 25(4/5):203-209.
[6] Gorgun E, Artan E, Orhon D, et al.Evaluation of nitrogen removal by step-feeding in large treatment plants[J].Wat Sci Tech, 1996, 34(1/2):253-260.
[7] John F, Diyamandoglu V, Carrio L A, et al.Full-scale evaluation of biological nitrogen removal in the step-feed activated sludge process[J].Water Environment Research, 1996, 68(2):132-142.
[8] Zhu Guibing, Peng Yongzhen, Wang Shuying.Hydraulic method of controlling solids retention time in step feed biological nitrogen removal process[J].Environmental Engineering Science, 2007, 24(8):1111-1118.
[9] American Public Health Association/American Water Works Association/Water Environment Federation.APHA standard methods for the examination of water and wastewater [M].19th ed.Washington DC, USA, 1995.
[10] Martins A M, Pagilla K, Heijnen J J, et al.Filamentous bulking sludge—a critical review[J].Water Research, 2004, 38(4):793-817.
[11] Rittmann B E, McCarty Perry L.Environmental biotechnology:principles and applications[M].New York:McGraw-Hill Inc., 2001.
[12] George T, Burton F L, Stensel H D.Wastewater engineering:treatment disposal and reuse[M].4th ed.New York:McGraw-Hill Inc., 2003.
[13] Zhu Guibing, Peng Yongzhen.Theoretical evaluation on nitrogen removal of step-feed anoxic/oxic activated sludge process[J].Journal of Harbin Institute of Technology, 2006, 13(3):45-49.

Memo

Memo:

Biographies: Zhu Guibing(1979—), male, doctor;Peng Yongzhen(corresponding author), male, doctor, professor, pyz@bjut.edu.cn.
Foundation items: The Project of Scientific Research Base and Scientific Innovation Platform of Beijing Municipal Education Commission(No.PXM2008_-014204_-050843), the Project of Beijing Science and Technology Committee(No.D07050601500000), the Knowledge Innovation Program of the Chinese Academy of Sciences(No.RCEES-QN-200706), the Special Funds for Young Scholars of RCEES, CAS.
Citation: Zhu Guibing, Peng Yongzhen, Wang Shuying, et al.Comparative study of two biological nitrogen removal processes:A/O process and step-feeding process[J].Journal of Southeast University(English Edition), 2008, 24(4):528-531.

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