Enhanced biological nutrient removal inmodified carbon source division anaerobic anoxic oxic process with return activated sludge pre-concentration

doi:10.1016/j.cjche.2014.11.013

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (6): 1027-1034.DOI: 10.1016/j.cjche.2014.11.013

• 能源、资源与环境技术 • 上一篇下一篇

Enhanced biological nutrient removal inmodified carbon source division anaerobic anoxic oxic process with return activated sludge pre-concentration

Qin Lu¹, Haiyan Wu², Haoyan Li³, Dianhai Yang¹

1 State Key Lab. of Pollution Control and Resources Reuse, College of Environmental Sciences and Engineering, Tongji University, Shanghai 200092, China;
2 Xylem (China) Co., Ltd., Shanghai 200051, China;
3 Shanghai Plant Biomass Co., Ltd., Shanghai 200092, China

收稿日期:2014-06-21 修回日期:2014-10-14 出版日期:2015-06-28 发布日期:2015-07-09
通讯作者: Dianhai Yang
基金资助:
Supported by the Major Science and Technology Program forWater Pollution Control and Treatment-Crucial Technology Research and Engineering Sample Subject on Municipal Wastewater Treatment Process Updated to Higher Drainage Standard (2008ZX07317-02) belonging to Wuhan Water Pollution Control and the Water Environment Administer Technology and Synthetic Sample Project in Cities and Towns (2008ZX07317).

Enhanced biological nutrient removal inmodified carbon source division anaerobic anoxic oxic process with return activated sludge pre-concentration

Qin Lu¹, Haiyan Wu², Haoyan Li³, Dianhai Yang¹

1 State Key Lab. of Pollution Control and Resources Reuse, College of Environmental Sciences and Engineering, Tongji University, Shanghai 200092, China;
2 Xylem (China) Co., Ltd., Shanghai 200051, China;
3 Shanghai Plant Biomass Co., Ltd., Shanghai 200092, China

Received:2014-06-21 Revised:2014-10-14 Online:2015-06-28 Published:2015-07-09
Contact: Dianhai Yang
Supported by:
Supported by the Major Science and Technology Program forWater Pollution Control and Treatment-Crucial Technology Research and Engineering Sample Subject on Municipal Wastewater Treatment Process Updated to Higher Drainage Standard (2008ZX07317-02) belonging to Wuhan Water Pollution Control and the Water Environment Administer Technology and Synthetic Sample Project in Cities and Towns (2008ZX07317).

摘要/Abstract

摘要： A pilot-scale modified carbon source division anaerobic anoxic oxic (AAO) process with pre-concentration of returned activated sludge (RAS) was proposed in this study for the enhanced biological nutrient removal (BNR) of municipal wastewater with limited carbon source. The influent carbon source was fed in step while a novel RAS pre-concentration tank was adopted to improve BNR efficiency, and the effects of an influent carbon source distribution ratio and a RAS pre-concentration ratiowere investigated. The results showthat the removal efficiency of TN is mainly influenced by the carbon source distribution ratio while the TP removal relies on the RAS pre-concentration ratio. The optimum carbon source distribution ratio and RAS pre-concentration ratio are 60% and 50%, respectively, with an inner recycling ratio of 100% under the optimum steady operation of pilot test, reaching an average effluent TN concentration of 9.8 mg·L^-1 with a removal efficiency of 63% and an average TP removal efficiency of 94%. The mechanism of nutrient removal is discussed and the kinetics is analyzed. The results reveal that the optimal carbon source distribution ratio provides sufficient denitrifying carbon source to each anoxic phase, reducing nitrate accumulation while the RAS pre-concentration ratio improves the condition of anaerobic zone to ensure the phosphorus release due to less nitrate in the returned sludge. Therefore, nitrifying bacteria, denitrifying bacteria and phosphorus accumulation organisms play an important role under the optimum condition, enhancing the performance of nutrient removal in this test.

关键词: Modified AAO process, Carbon source distribution ratio, Returned activated sludge pre-concentration, Biological nutrient removal

Abstract: A pilot-scale modified carbon source division anaerobic anoxic oxic (AAO) process with pre-concentration of returned activated sludge (RAS) was proposed in this study for the enhanced biological nutrient removal (BNR) of municipal wastewater with limited carbon source. The influent carbon source was fed in step while a novel RAS pre-concentration tank was adopted to improve BNR efficiency, and the effects of an influent carbon source distribution ratio and a RAS pre-concentration ratiowere investigated. The results showthat the removal efficiency of TN is mainly influenced by the carbon source distribution ratio while the TP removal relies on the RAS pre-concentration ratio. The optimum carbon source distribution ratio and RAS pre-concentration ratio are 60% and 50%, respectively, with an inner recycling ratio of 100% under the optimum steady operation of pilot test, reaching an average effluent TN concentration of 9.8 mg·L^-1 with a removal efficiency of 63% and an average TP removal efficiency of 94%. The mechanism of nutrient removal is discussed and the kinetics is analyzed. The results reveal that the optimal carbon source distribution ratio provides sufficient denitrifying carbon source to each anoxic phase, reducing nitrate accumulation while the RAS pre-concentration ratio improves the condition of anaerobic zone to ensure the phosphorus release due to less nitrate in the returned sludge. Therefore, nitrifying bacteria, denitrifying bacteria and phosphorus accumulation organisms play an important role under the optimum condition, enhancing the performance of nutrient removal in this test.

Key words: Modified AAO process, Carbon source distribution ratio, Returned activated sludge pre-concentration, Biological nutrient removal

Qin Lu, Haiyan Wu, Haoyan Li, Dianhai Yang. Enhanced biological nutrient removal inmodified carbon source division anaerobic anoxic oxic process with return activated sludge pre-concentration[J]. Chinese Journal of Chemical Engineering, 2015, 23(6): 1027-1034.

参考文献

[1] G.T. Daigger, S.R. Polson, Design and operation of biological phosphorus removal facilities, Phosphorus and Nitrogen Removal from Municipal Wastewater—Principles and Practice II, Lewis Publishers, New York, 1991, pp. 167-198.

[2] J. Wanner, J.S. Cech, M. Kos, New process design for biological nutrient removal, Water Sci. Technol. 25 (4/5) (1992) 445-448.

[3] P. Cooper,M. Day, V. Thomas, Process options for phosphorus and nitrogen removal from wastewater, J. Inst. Water Environ. Manage. 8 (2) (1994) 84-92.

[4] J.Molina, J. Fernandez, D. Ayala,M. Ochoa, Simultaneous Carbon, Nitrogen and Phosphorus Removal From Wastewater With a Modified Hybrid UCT System, 77DYNAColombia, 2010. 39-48.

[5] Y.Z. Peng, S.J. Ge, Enhanced nutrient removal in three types of step feeding process from municipal wastewater, Bioresour. Technol. 102 (11) (2011) 6405-6413.

[6] W. Liu, D.H. Yang, L. Xu, C.M. Shen, Amodified oxidation ditch with additional internal anoxic zones for enhanced biological nutrient removal, Chin. J. Chem. Eng. 21 (2) (2013) 192-198.

[7] X. Hu, L. Xie, Hojae Shim, S.F. Zhang, D.H. Yang, Biological nutrient removal in a full scale anoxic/anaerobic/aerobic/pre-anoxic-MBR plant for low C/N ratio municipal wastewater treatment, Chem. Eng. J. 22 (4) (2014) 447-454.

[8] G.B. Zhu, Y.Z. Peng, S.Y.Wang, S.Y.Wu, B.Ma, Effect of influent flow rate distribution on the performance of step-feeding biological nitrogen removal process, Chem. Eng. J. 131 (2007) 319-328.

[9] G.B. Zhu, Y.Z. Peng, S.Y. Wang, B. Ma, Comparative study of two biological nitrogen removal processes: A/O process and step feeding process, J. Southeast. Univ. 24 (2008) 528-531.

[10] G.B. Zhu, Y.Z. Peng, L.M. Zhai, Y.Wang, S.Y.Wang, Performance and optimization of biological nitrogen removal process enhanced by anoxic/oxic step feeding, Biochem. Eng. J. 43 (2009) 280-287.

[11] L. Larrea, A. Larrea, E. Ayesa, J.C. Rodrigo, M.D. Lopez-Carrasco, J.A. Cortacans, Development and verification of design and operation criteria for the step feed process with nitrogen removal, Water Sci. Technol. 43 (2001) 261-268.

[12] T.Y. Pai, Y.P. Tsai, Y.J. Chou, H.Y. Chang, H.G. Leu, C.F. Ouyang, Microbial kinetic analysis of three different types of EBNR process, Chemosphere 55 (2004) 109-118.

[13] W. Wang, S.Y.Wang, Y.Z. Peng, S.F. Zhang, F.F. Yin, Enhanced biological nutrients removal inmodified step-feed anaerobic/anoxic/oxic process, Chin. J. Chem. Eng. 17 (5) (2009) 840-848.

[14] D. Jenkins, V. Tandoi, The applied microbiology of enhanced biological phosphorus removal accomplishments and needs, Water Res. 25 (12) (1991) 1471-1478.

[15] W. van Starkenburg, J.H. Rensink, G.B.J. Rijs, Biological P-removal: state of the art in the Netherlands, Water Sci. Technol. 27 (5/6) (1993) 317-328.

[16] C.D. Boswell, R.E. Dick, L.E. Macaskie, The effect of heavy metals and other environmental conditions on the anaerobic phosphate metabolism of Acinetobacter johnsonii, Microbiology 145 (1999) 1711-1720.

[17] D. Mulkerrins, A.D.W. Dobson, E. Colleran, Parameters affecting biological phosphate removal from wastewaters, Environ. Int. 30 (2) (2004) 249-259.

[18] A. Oehmen, P.C. Lemos, G. Carvalho, Z. Yuan, J. Keller, L.L. Blackall, M.A.M. Reis, Advances in enhanced biological phosphorus removal: from micro to macro scale, Water Res. 41 (2007) 2271-2300.

[19] C.H. Chang, O.J. Hao, Sequencing batch reactor systemfor nutrient removal: ORP and pH profiles, J. Chem. Technol. Biotechnol. 67 (1) (1996) 27-38.

[20] A.A. Kazmi, M. Fujita, H. Furumai, Modeling effect of remaining nitrate on phosphorus removal in SBR, Water Sci. Technol. 43 (3) (2001) 175-182.

[21] H. Zou, G.C. Du,W.Q. Ruan, J. Chen, Role of nitrate in biological phosphorus removal in a sequencing batch reactor, World J.Microbiol. Biotechnol. 22 (7) (2006) 701-706.

[22] Y.Z. Peng, H.X. Hou, S.Y. Wang, Y.W. Cui, Z.G. Yuan, Nitrogen and phosphorus removal in pilot scale anaerobic anoxic OD system, J. Environ. Sci. (China) 20 (4) (2008) 398-403.

[23] J.P. Kerrn-Jespersen, M. Henze, Biological phosphorus uptake under anoxic and aerobic conditions, Water Res. 27 (4) (1993) 617-624.

[24] J.P. Kerrn-Jespersen, M. Henze, R. Strube, Biological phosphorus release and uptake under alternating anaerobic and anoxic conditions in a fixed-film reactor, Water Res. 28 (5) (1994) 1253-1255.

[25] T. Kuba, G.J.F. Smolders, M.C.M. van Loosdrencht, J.J. Heijnen, Biological phosphorus removal from wastewater by anaerobic-anoxic sequencing batch reactor,Water Sci. Technol. 27 (5/6) (1993) 241-252.

[26] T. Kuba, A.Wachtmeister, M.C. van Loosdrecht, J.J. Heijnen, Effect of nitrate on phosphorus release in biological phosphorus removal systems, Water Sci. Technol. 30 (6) (1994) 263-269.

[27] J.B. Copp, P.L. Dold, Confirming the nitrate-to-oxygen conversion factor for denitrification, Water Res. 32 (1998) 1296-1304.

[28] Y.Y.Wang, Y.Z. Peng, T. Stephenson, Effect of influent nutrients ratios and hydraulic retention time (HRT) on simultaneous phosphorus and nitrogen removal in a two-sludge sequencing batch reactor process, Bioresour. Technol. 100 (2009) 3506-3512.

[29] C. Zhang, Y. Chen, Simultaneous nitrogen and phosphorus recovery from sludgefermentation liquid mixture and application of the fermentation liquid to enhance municipal wastewater biological nutrients removal, Environ. Sci. Technol. 43 (2009) 6164-6170.

[30] H. Liu, Y.F. Sun, X.S. Jia, J. Li, K.Q. Zhou, X.D. Qu, X.Q. Tao, Y. Chen, Identification and metabolic mechanism of non-fermentative short-cut denitrifying phosphorusremoving bacteria, Chin. J. Chem. Eng. 21 (3) (2013) 332-340.

[31] H.Y. Chang, C.F. Ouyang, Improvement of nitrogen and phosphorus removal in the anaerobic-oxic-anoxic-oxic (AOAO) process by stepwise feeding, Water Sci. Technol. 42 (2000) 89-94.

[32] J.H. Guo, Q. Yang, Y.Z. Peng, A.M. Yang, S.Y. Wang, Biological nitrogen removal with real-time control using step-feed SBR technology, Enzym. Microb. Technol. 40 (2007) 1564-1569.

[33] W. Liu, D.H. Yang, L. Xu, C. Jia, W.J. Lu, O.I. Bosire, C.M. Shen, Effect of return sludge pre-concentration on biological phosphorus removal in a novel oxidation ditch, Chin. J. Chem. Eng. 20 (4) (2012) 747-753.

[34] APHA (American Public Health Association), AWWA (AmericanWaterWorks Association), WEF (Water Environment Federation), StandardMethods for the Examination of Water and Wastewater, 20th ed., 1995. (Washington, DC).

[35] S.J. Ge, Y.Z. Peng, S.Y. Wang, J.H. Guo, B. Ma, L. Zhang, X. Cao, Enhanced nutrient removal in a modified step feed process treating municipal wastewater with different inflow distribution ratios and nutrient ratios, Bioresour. Technol. 101 (2010) 9012-9019.

Enhanced biological nutrient removal inmodified carbon source division anaerobic anoxic oxic process with return activated sludge pre-concentration

Enhanced biological nutrient removal inmodified carbon source division anaerobic anoxic oxic process with return activated sludge pre-concentration

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 1

编辑推荐

Metrics

本文评价