Enhanced Biological Nutrients Removal in Modified Step-feed Anaerobic/Anoxic/Oxic Process

Abstract

Abstract: In order to enhance phosphorus removal in traditional step-feed anoxic/oxic nitrogen removal process,a modified pilot-scale step-feed anaerobic/anoxic/oxic (SFA²/O) system was developed,which combined a reactor similar to UCT-type configuration and two-stage anoxic/oxic process.The simultaneous nitrogen and phosphorus removal capacities and the potential of denitrifying phosphorus removal,in particular,were investigated with four different feeding patterns using real municipal wastewater.The results showed that the feeding ratios(Q₁)in the first stage determined the nutrient removal performance in the SFA 2/O system.The average phosphorus removal efficiency increased from 19.17% to 96.25% as Q₁ was gradually increased from run 1 to run 4,but the nitrogen removal efficiency exhibited a different tendency,which attained a maximum 73.61% in run 3 and then decreased to 59.62% in run 4.As a compromise between nitrogen and phosphorus removal,run 3 (Q₁=0.45Q_total) was identified as the optimal and stable case with the maximum anoxic phosphorus uptake rate of 1.58mg·(g MLSS)^-1·h^-1.The results of batch tests showed that ratio of the anoxic phosphate uptake capacity to the aerobic phosphate uptake capacity increased from 11.96% to 36.85% with the optimal influent feeding ratio to the system in run 3,which demonstrated that the denitrifying polyP accumulating organisms could be accumulated and contributed more to the total phosphorus removal by optimizing the inflow ratio distribution.However,the nitrate recirculation to anoxic zone and influent feeding ratios should be carefully controlled for carbon source saving.

Key words: nutrients removal, nitrogen, phosphorus, anaerobic/anoxic/oxic, step-feed

摘要： In order to enhance phosphorus removal in traditional step-feed anoxic/oxic nitrogen removal process,a modified pilot-scale step-feed anaerobic/anoxic/oxic (SFA²/O) system was developed,which combined a reactor similar to UCT-type configuration and two-stage anoxic/oxic process.The simultaneous nitrogen and phosphorus removal capacities and the potential of denitrifying phosphorus removal,in particular,were investigated with four different feeding patterns using real municipal wastewater.The results showed that the feeding ratios(Q₁)in the first stage determined the nutrient removal performance in the SFA²/O system.The average phosphorus removal efficiency increased from 19.17% to 96.25% as Q₁ was gradually increased from run 1 to run 4,but the nitrogen removal efficiency exhibited a different tendency,which attained a maximum 73.61% in run 3 and then decreased to 59.62% in run 4.As a compromise between nitrogen and phosphorus removal,run 3 (Q₁=0.45Q_total) was identified as the optimal and stable case with the maximum anoxic phosphorus uptake rate of 1.58mg·(g MLSS)^-1·h^-1.The results of batch tests showed that ratio of the anoxic phosphate uptake capacity to the aerobic phosphate uptake capacity increased from 11.96% to 36.85% with the optimal influent feeding ratio to the system in run 3,which demonstrated that the denitrifying polyP accumulating organisms could be accumulated and contributed more to the total phosphorus removal by optimizing the inflow ratio distribution.However,the nitrate recirculation to anoxic zone and influent feeding ratios should be carefully controlled for carbon source saving.

关键词: nutrients removal, nitrogen, phosphorus, anaerobic/anoxic/oxic, step-feed

WANG Wei, WANG Shuying, PENG Yongzhen, ZHANG Shanfeng, YIN Fangfang. Enhanced Biological Nutrients Removal in Modified Step-feed Anaerobic/Anoxic/Oxic Process[J]. , 2009, 17(5): 840-848.

王伟, 王淑莹, 彭永臻, 张善锋, 殷芳芳. Enhanced Biological Nutrients Removal in Modified Step-feed Anaerobic/Anoxic/Oxic Process[J]. , 2009, 17(5): 840-848.

References

1 Daigger, G.T., Polson, S.R., “Design and operation of biological phosphorus removal facilities”, In:Phosphorus and Nitrogen Removal from Municipal Wastewater-Principles and PracticeⅡ, Lewis Publishers, New York, 167-198 (1991).
2 Wanner, J., Cech, J.S., Kos, M., “New process design for biological nutrient removal”, Water Sci. Tech., 25 (4/5), 445-448 (1992).
3 Cooper, P., Day, M., Thomas, V., “Process options for phosphorus and nitrogen removal from wastewater”, J. IWEM, 8 (2), 84-92 (1994).
4 Metcalf and Eddy, Inc., Wastewater Engineering:Treatment and Reuse, 4th edition., McGraw-Hill, New York, 799-800 (2003).
5 Jenkins, D., Tandoi, V., “The applied microbiology of enhanced biological phosphorus removal accomplishments and needs”, Water Res., 25 (12), 1471-1478 (1991).
6 van Starkenburg, W., Rensink, J.H., Rijs, G.B.J., “Biological P-removal:State of the art in the Netherlands”, Water Sci. Tech., 27 (5/6), 317-328 (1993).
7 Kerrn-Jespersen, J.P., Henze, M., “Biological phosphorus uptake under anoxic and aerobic conditions”, Water Res., 27 (4), 617-624 (1993).
8 Kerrn-Jespersen, J.P., Henze, M., Strube, R., “Biological phosphorus release and uptake under alternating anaerobic and anoxic conditions in a fixed-film reactor”, Water Res., 28 (5),1253-1255 (1994).
9 Kuba, T., Smolders, G.J.F., van Loosdrencht, M.C.M., Heijnen, J.J., “Biological phosphorus removal from wastewater by anaerobic-anoxic sequencing batch reactor”, Water Sci. Tech., 27 (5/6), 241-252 (1993).
10 Kuba, T., Wachtmeister, A., van Loosdrecht, M.C., Heijnen, J.J., “Effect of nitrate on phosphorus release in biological phosphorus removal systems”, Water Sci. Tech., 30 (6), 263-269 (1994).
11 Mino, T., van Loosdrecht, M.C.M., Heijnen, J.J., “Microbiology and biochemistry of the enhanced phosphate removal process”, Water Res., 32 (11), 3193-3207 (1998).
12 Kuba, T., van Loosdrencht, M.C.M., Heijnen, J.J., “Phosphorus and nitrogen removal with minimal COD requirement by intetration of denitrifying dephosphatation and nitrification in a two-sludge system”, Water Res., 30 (7), 1702-1710 (1996).
13 Kuba, T., van Loosdrecht, M.C.M., Brandse, F.A., Heijnen, J.J., “Occurrence of denitrifying phosphorus removing bacteria in modified UCT-type wastewater treatment plants”, Water Res., 31 (4), 777-786 (1997).
14 Bortone, G., Marsili, L.S., Tilche, A., Wanner, J., “Anoxic phosphoate uptake in the dephanox process”, Water Sci. Tech., 40 (4/5), 177-185 (1999).
15 Peng, Y.Z., Wang, X.L., Wu, W.M, Li, J., Fan, J., “Optimisation of anaerobic/anoxic/oxic process to improve performance and reduce operating costs”, J. Chem. Tech. Biotech., 81 (8), 1391-1397 (2006).
16 Wang, W., Wang, S.Y., Wang, H.D., Ling, Y.F., Liu, Z.B., “Factors influencing the step-feed biological nitrogen removal process with continuous flow and its optimizing control”, Techniq. Equip. Environ. Pollut. Contr., 7 (10), 83-87 (2006).
17 Zhu, G.B., Peng, Y.Z., Wang, S.Y., Wu, S.Y., “Effect of influent flow rate distribution on the performance of step-feed biological nitrogen removal process”, Chem. Eng. J., 131 (1-3), 319-328 (2007).
18 stgaard, K., Christensson, M., Lie, E., J nsson, K., Welander, T., “Anoxic biological phosphorus removal in a full-scale UCT process”, Water Res., 31 (11), 2719-2726 (1997).
19 APHA, Standard Methods for the Examination of Water and Wastewater, Greenburg, A.E., Clesceri, L.S., Eaton, A.D., eds., 19th edition., American Public Health Association/American Water Works Association/Water Environment Federation, Washington, DC(1995).
20 Smolders, G.J.F., van der Meij, J., van Loosdrecht, M.C.M., Heijnen, J.J., “Model of the anaerobic metabolism of the biological phosphorus removal process:Stoichiometry and pH influence”, Biotechnol. Bioeng., 43 (6), 461-470 (1994).
21 Wachtmeister, A., Kuba, T., van Loosdrecht, M.C.M., “A sludge characterization assay for aerobic and denitrifying phosphorus removing sludge”, Water Res., 31 (3), 471-478 (1997).
22 Seviour, R.J., Mino, T., Onuki, M., “The microbiology of biological phosphorus removal in activated sludge systems”, FEMS Microbiol. Rev., 27 (1), 99-127 (2003).
23 Wang, W., Wang, S.Y., Sun, Y.N., Peng, Y.Z., “Establishment and application of influent flow distribution expert system in step-feed A/O process”, J. Chem. Ind. Eng., 59 (10), 2608-2615 (2008).

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