Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
권호 표지

Nitrongen and Phosphorus Removal using Elutriated Acids of Food Waste as an External Carbon Source in SBR

음식물쓰레기 세정산발효액을 외부탄소원으로 주입한 SBR 공정에서 질소 및 인 제거

  • Kwon, Koo-ho (Department of Environment Engineering, Kyungpook National University) ;
  • Kim, Si-won (Department of Environment Engineering, Kyungpook National University) ;
  • Lee, Min-jae (Department of Environment Engineering, Kyungpook National University) ;
  • Min, Kyung-sok (Department of Environment Engineering, Kyungpook National University)
  • Received : 2005.10.07
  • Accepted : 2006.02.01
  • Published : 2006.05.30
Download PDF
⟨ Previous Next ⟩

Abstract

An improvement of nitrogen and phosphorus removal in SBR using the elutriated acids from the food waste as an external carbon source was investigated in this study. The food waste was elutriated at $35^{\circ}C$ and pH 9 to produce the external carbon source. The elutriate of food waste were continuously collected. The elutriated liquid contained VFAs of 39,180 mg/L representing soluble COD of 44,700 mg/L. The SBR showed poor denitrification and EBPR (enhanced biological phosphorus removal) without elutriated VFAs addition. An average denitrification rate was 0.4 mg NOx-N/g MLVSS/day. In turn, EBPR was also inhibited by this poor denitrification because the remaining nitrate in anaerobic phase resulting a poor denitrification. On the other hand, the denitrification in anoxic phase significantly improved with an elutriated VFAs addition. Nitrate removal was 82% while the denitrification rate was 2.9 mg NOx-N/g MLVSS/day with 18.4 mL/cycle of elutriated VFAs. With the enhanced denitrification, nitrate concentration in anaerobic phase could effectively be controlled to a very low level. The elimination of nitrate inhibition in anaerobic phase resulted enhancement of EBPR. The specific phosphate release rate was $1.9mg\;PO_4^{3-}-P/g\; MLVSS/day$ with less than 0.5 mg/L of $PO_4^{3-}-P$ concentration.

Keywords

References

  1. 권미경, 정용준, 도중호, 민경석, 음식물쓰레기와 하수일차 슬러지의 혼합 산발효, 대한환경공학회지, 21(5-B), pp.561-566 (2001)
  2. 박소민, 민경석, 안영호, 박종복, 세정산발효에서 pH와 온도가 일차슬러지의 유기산 형성에 미치는 영향, 한국물환경학회.대한상하수도학회 공동춘계학술발표회 논문집, pp. 327-330 (2003)
  3. 박소민, 민경석, 안영호, 박종복, 하수일차슬러지의 세정 산 발효, 대한환경공학회지, 26(2), pp. 219-225 (2004)
  4. 배진연, 민경석, 돈사폐수의 세정산발효시 온도와 전처리의 영향, 한국물환경학회지, 21(1), pp. 34-39 (2005)
  5. 송창수, 오준성, SBR공정에서 영양염류 제거에 대한 염분의 영향, 한국물환경학회지, 18(3), pp. 237-243 (2002)
  6. 임성일, 이창근, 강성재, 이병헌, 음식물쓰레기의 산발효액을 이용한 고도 하수처리시 외부 탄소원으로의 적용성 검토, 한국수처리기술연구회, 10(1), pp. 21-30 (2002)
  7. 최찬식, 김동한, 정태학, SBR공정에서 질산염이 질소와 인의 제거에 미치는 영향, 한국물환경학회지, 10(2), pp. 82-89 (1994)
  8. 환경부, 음식물쓰레기 관리정책 및 기술 동향과 감량화.자원화 실천 사례 (1997)
  9. APHA, Standard Method for the Examination of Water and Wastewater, 20th, ed., Washington, D.C. (1998)
  10. Lee, D. S., Jeon, C. O. and Park, J. M., Biological Nitrogen Removal with Enhanced Phosphate Uptake in a Sequencing Batch Reactor using Single Sludge System, Water Research, 35(16), pp. 3968-3976 (2001) https://doi.org/10.1016/S0043-1354(01)00132-4
  11. Mok, C. K., Han, J. S., Kim, Y. J., Kim, N. S., Kwon, D. Y. and Nam, Y. J., Lactic Acid Fermentation of Rice and Quality Improvement by Amylolytic Enzyme Treatment during Fermentation, KOREAN J. Food SCI. TECHNOL, 23(6), pp. 739-744 (1992)
  12. Nuno, R. L., Donald, S. M., William, K. O., Axel, M. and Ian, S. G., Methanol-induced Biological Nutrient Removal Kinetics in a Full-scale Sequencing Batch Reactor, Water Research, 36(11), pp. 2721-2732 (2002) https://doi.org/10.1016/S0043-1354(01)00494-8