Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Removal of Nutrients from Domestic Wastewater Using Intermittently Aerated Activated Sludge Systems Supplemented with Fermented Settled Sludge

발효된 1차 침전슬러지를 공급하여 간헐폭기조를 이용한 도시하수의 영양염류 처리

  • Weon, Seung-Yeon (Institute of Technology and development, Donglim C & E. Co. Ltd) ;
  • Lee, Sang-Ill (Department of Environmental Engineering, Chungbuk National University)
  • 원성연 (동림건설(주) 기술개발연구소) ;
  • 이상일 (충북대학교 환경공학과)
  • Published : 2004.01.30
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Abstract

In this research, a 2-stage intermittently aerated activated sludge system(IA) and intermittently aerated dynamic flow activated sludge system(DF) were investigated for the removal of nutrients in domestic wastewater. Wastewater was characterized by low C/N( organics/nitrogen) ratio. $COD_{cr}$, $BOD_s$, TKN and TP concentrations of domestic wastewater were 235, 47, 32 and 5.4 mg/L, respectively. Three sets of IA and one set of DF were operated. Three of four systems were added with fermented settled sludge taken from primary settling tank as an external electron donor and the other(IA) for control reactor was operated without addition of electron donor. All systems were operated at same sludge retention time of 20 days and hydraulic retention time of 12hrs. The supplemental electron donor was supplied into the anoxic mode. A higher denitrification rate was observed from the reactors with fermented settled sludge as an electron donor for denitrification compared to that of without addition of organic source. The result of this study indicates that the settled primary sludge, if the fermented at the acid stage, was an excellent electron donor for denitrification. 81 % of TN and 80% of TP were removed from the systems with the supplemental organic source added. However, the control reactor without addition of electron donor showed only 39% of TN and 43% of TP.

Keywords

References

  1. Simpkins, M. J,, and McLaren, A. R., Consistent biological phosphate and nitrate removal in an activated sludge plant, Prog. Water Technol, 10(5), pp. 433-442 (1978)
  2. Luzack, F. J., and Ettinger, M. B., Controlling operation to minimize activated sludge effluent nitrogen, Journal of Water Pollut. Cont. Federation, 34, pp. 920-931 (1962)
  3. Sasaki, K., Yamamoto, Y., Tsumura, K., Ouchi, S. and Mori, Y., Development of 2-reactor intermittent- aeration activated sludge process for simultaneous removal of nitrogen and phosphorus, Water Sci. Technol, 34(1-2), pp. 111-118 (1996)
  4. Osada, T., Haga, K. and Harada, Y., Removal of nitrogen and phosphorus from swine wastewater by the activated sludge units with the intermittent aeration process, Water Res., 25(11), pp. 1377-1388 (1991)
  5. Henze, M., Capabilities of biological nitrogen removal processes from wastewater, Water Sci. Technol, 23(4-6), pp. 669-679 (1991)
  6. Zhao, H., Isaacs, S. H., Spielberg, H., and Kummel, M., Novel control strategy for improved nitrogen removal in an alternating activated sludge process-part II. control development, Water Res., 28(3), pp. 535-542 (1994)
  7. Isaacs, S. H., Henze, M., Sphieberg, H., and Kummel, M., External carbon source addition as a means to control an activated sludge nutrient removal process, Water Res., 28(3), pp. 511-520 (1994)
  8. Hallin, S., and Pell, M., Metabolic properties of denitrifying bacteria adapting to methanol and ethanol in activated sludge, Water Res., 32(1), pp. 13-18 (1998)
  9. Blaszczyk, M., Effect of various sources of organic carbon and high nitrate concentrations on the selection of denitrifying bacteria. II. Continuous cultures in packed bed reactors, Acta Microbial. Pol., 32, pp. 65-71 (1983)
  10. Blaszczyk, M., Mycielski, R., Jaworowska-Deptuch, H., and Brzostek, K., Effect of various sources of organic carbon and high nitrate concentrations on the selection of denitrifying bacteria. I. Stationary cultures, Acta Microbiol. Pol., 29, pp. 397-406 (1980)
  11. Werner, M., and Kayser, R., Denitrification with biogas as external carbon source, Water Sci. Technol., 23(4-6), pp. 701-708 (1991)
  12. Lee, S. I., Koopman, B., Park, S. K., and Keith, C., Effect of fermented wastes on denitrification in activated sludge, Water Environ. Res., 67(7), pp. 1119-1122 (1995)
  13. APHA, American Public Health Association, Standard Methods for the Examination of Water and Wastewater, 19th ed., Washington DC (1995)
  14. Molnar, L., and Bartha, I., Factors influencing solid-state anaerobic digestion, Biol. Waste, 28(1), pp. 15-24 (1989)
  15. Park, S. K., Weon, S. Y., and Lee, S. I., Acid fermentation of livestock waste and application for electron donor, J Korean Solid Waste Engineering Society, 17(6), pp. 766-773 (2000)
  16. Zhiguo, Y., Herwig, B., James, L., and Willy, V., Reducing the size of a nitrogen removal activated sludge plant by shortening the retention time of inert solids via sludge storage, Water Res., 34(2), pp. 539-549 (2000)
  17. Hanaki K., Wantawin C. and Ohgaki S., Nitrification at low levels of dissolved oxygen with and without organic loading in a suspended-growth reactor. Water Res., 24(3), pp. 297-302 (1990)
  18. Boon B. and Laudelout H., Kinetics of nitrite oxidation by Nitrobacter winogradskyi. Biochem. J., 85, pp. 440-447 (1962)
  19. Comeau, Y., The Role of Carbon Strage in Biological Phosphate Removal from Wastewater., Ph. D. dissertation, University of British Columbia, Vancouver, Canada. (1989)
  20. Wentzel, M. C., Loetter, L. H., Loewenthal, R. E., and Marais, Gv. R., Metabolic behaviour of Acinetobacter spp. in enhanced biological phosphorus removal-A biochemical model, Water S.A., 12(4), pp. 209-224 (1986)