한국물환경학회지 (Journal of Korean Society on Water Environment)

  • 제21권1호
  • /
  • Pages.59-65
  • /
  • 2005
  • /
  • 2289-0971(pISSN)
  • /
  • 2289-098X(eISSN)
한국물환경학회 (Korean Society on Water Environment)
권호 표지

완전혼합형 정석탈인반응조에서 미분말 전로슬래그를 이용한 고농도 인의 회수

Recovery of High Concentrated Phosphates using Powdered Converter Slag in Completely Mixed Phosphorus Crystallization Reactor

  • 투고 : 2004.10.05
  • 심사 : 2004.11.08
  • 발행 : 2005.01.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

A phosphate recovery system from artificial wastewater was developed using a completely mixed phosphorus crystallization reactor, in which powdered converter slag was used as a seeding crystal. In preliminary test, the optimal pH range for meta-stable hydroxyapatite crystallization for high phosphorus concentration was observed to be 6.0 to 7.0, which was different from the conventionally known pH range (8.0~9.5) for effective crystallization in relatively low phosphorus concentration less than 5 mg/L. The average phosphorus removal efficiency in a lab-scaled completely mixed crystallization system for artificial wastewater with about 100 mg/L of average $PO_4-P$ concentration was shown to be 60.9% for 40 days of lapsed time. XRD analysis exhibited that crystalline of hydroxyapatite formed on the surface of seed crystal, which was also observed in SEM analysis. In EDS mapping analysis, composition mole ratio (=Ca/P) of the crystalline was found to be 1.78, indicating the crystalline on the surface of seed crystal is likely to be hydroxyapatite. Particle size distribution analysis showed that average size of seed crystal increased from $28{\mu}m$ up to $50{\mu}m$, suggesting that phosphorus recycling from wastewater with high phosphorus concentration can be successfully obtained by using the phosphorus crystallization recovery system.

키워드

과제정보

연구 과제 주관 기관 : (주)태영

참고문헌

  1. 김응호, 현인환, 황환국, 전로슬래그를 이용한 정석탈인법의 영향인자, 대한환경공학회 추계학술연구발표회 (1995)
  2. 김응호, 허순철, 조진규, 정석탈인재인 입상 전로슬래그의 $Ca^{2+}$ 이온 용출특성, 한국수질보전학회지, 13(4), pp. 401-406 (1997)
  3. 환경부, 수질오염 공정시험법 (1999)
  4. APHA, AWWA and WEF, Standard Methods for Examination of Water and Wastewater, 20th edition, Washington D.C., USA (1998)
  5. Donnert D. and Seckler M., Elimination of phosphorus from municipal and industrial wastewater, Wat. Sci. & Technol., 40, pp. 195-202 (1999)
  6. Driver, J., Phosphates recovery for recycling from sewage and animal wastes, Phosphorus and Potassium, 216, pp. 17-22 (1998)
  7. Kanazawa T., Chemistry of potassium phosphate, Jap. Chem. Field, 27, pp. 222-229 (1973)
  8. Seckler, M. M., Bruinsma, O. S. L., and Van Rosmalen G. M., Phosphate removal in a fluidized bed - I. Identification of physical process, Wat. Res., 30, pp. 1585-1588 (1996a) https://doi.org/10.1016/0043-1354(96)00018-8
  9. Seckler, M. M. van Leeuwen, M. L. J., Bruinsma, O. S. L. and van Rosmalen, G. M., Phosphate removal in a fluidized bed - II. Process Optimization, Wat. Res., 30, pp. 1589-1596 (1996b) https://doi.org/10.1016/0043-1354(96)00017-6
  10. Steen, I., Phosphorus Availability in the 21st century: Management of a nonrenewable resource, Phosphorus and Potassium, 217, pp. 25-32 (1998)
  11. Yamada H., Kayama M., Saito K. and Hara M., A fundamental research on phosphate removal by using slag, Wat. Res., 20, pp. 547-557 (1980) https://doi.org/10.1016/0043-1354(86)90018-7
  12. Yim S. and Kim E-H, A comparative study of seed crystals for the phosphorus crystallization process, Environ. Technol., 25, pp. 741-750 (2004) https://doi.org/10.1080/09593330.2004.9619364