Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
권호 표지
DOI QR코드

DOI QR Code

Elution characteristics of lime-based granular alkaline material and applicability of phosphorus crystallization processes

석회계 입상알칼리재의 용출특성과 이를 이용한 인 결정화공정의 적용성

  • Received : 2017.11.14
  • Accepted : 2017.12.01
  • Published : 2017.12.15
Download PDF
⟨ Previous Next ⟩

Abstract

One of the major sources causing eutrophication and algal blooms of lakes or streams is phosphorus which comes from point and nonpoint pollution sources. HAP (hydroxyapatite) crystallization using granular alkaline materials can achieve the decrease of phosphorus load from wastewater treatment plants and nonpoint pollution control facilities. In order to induce HAP crystal formation, continuous supply of calcium and hydroxyl ions is required. In this research, considering HAP crystallization, several types of lime-based granular alkaline materials were prepared, and the elution characteristics of calcium and hydroxyl ions of each were analyzed. Also, column tests were performed to verify phosphorus removal efficiencies of granular alkaline materials. Material_1 (gypsum+cement mixed material) achieved the highest pH values in the column tests consistently, also, Material_2 (gypsum+slag mixed material) and Material_3 (calcined limestone material) achieved over pH 9.0 for 240 hours (10 days) and proved the efficiencies of long-term ion supplier for HAP crystallization. In the column tests using Material_3, considerable pH increase and phosphorus removal were carried out according to each linear velocity and filtration depth. T-P removal efficiencies were 87.0, 84.0, 68.0% and those of PO4-P 100.0, 97.0, 80.0% for linear velocity of 1.0, 2.5, 5.0 m/hr respectively. Based on the column test results, the applicability of phosphorus removal processes for small-scale wastewater treatment plants and nonpoint pollution control facilities was found out.

Keywords

References

  1. Berg, U., Donnert, D., Weidler, P. G., Kaschka, E., Knoll, G., Nuesch, R. (2006). Phosphorus removal and recovery from wastewater by tobermorite-seeded crystallisation of calcium phosphate. Water Sci. Technol., 53(3), 131-138. https://doi.org/10.2166/wst.2006.084
  2. Chen, X., Kong, H., Wu, D., Wang, X., Lin, Y. (2009). Phosphate removal and recovery through crystallization of hydroxyapatite using xonotlite as seed crystal. J. Environ. Sci., 21(5), 575-580. https://doi.org/10.1016/S1001-0742(08)62310-4
  3. Clair, N. S., Perry, L. M., Gene, F. P. (2003). Chemistry for environmental engineering and science, McGraw-Hill Education, USA.
  4. Donnert, D., Salecker, M. (1999). Elimination of phosphorus from waste water by crystallization. Environ. Technol., 20(7), 735-742. https://doi.org/10.1080/09593332008616868
  5. Horan, N. J. (1990). Biological wastewater treatment system-theory and operation, Wiley, USA.
  6. Jang, H., Kang, S. H. (2002). Phosphorus removal using cow bone in hydroxyapatite crystallization. Water Res., 36(5), 1324-1330. https://doi.org/10.1016/S0043-1354(01)00329-3
  7. Joko, I. (1984). Phosphorus removal from wastewater by the crystallization method. Water Sci. Technol., 17, 121-132.
  8. Jung, H. C. (2004). Recovery of high concentrated phosphates using powdered converter slag in phosphorus crystallization, Master's thesis, Hong-Ik University, pp. 28-69.
  9. Kim, E. H., Yim, S. B. (2008). Simultaneous handling of phosphorus removal and filtration using granular converter slag as seed crystal and filter media. Journal of water treatment, 16(4), 45-54.
  10. Kim, E. H., Hur, S. C., Cho, J. K. (1997). Leaching characteristics of calcium ion from granular converter slag as phosphorus crystallizer. Journal of Korean Society on Water Environment, 13(4), 401-406.
  11. Kim, E. H., Yim, S. B., Jung, H. C., Lee, E. J. (2006). Hydroxyapatite crystallization from a highly concentrated phosphate solution using powdered converter slag as a seed material. J. Hazard. Mater., 136(3), 690-697. https://doi.org/10.1016/j.jhazmat.2005.12.051
  12. Kim, E. H., Yim, S. B., Jung, H. C., Lee, E. J., Cho, J. K. (2005). Recovery of high concentrated phosphates using powdered converter slag in completely mixed phosphorus crystallization reactor. Journal of Korean Society on Water Quality, 21(1), 59-65.
  13. Park, H. B. (2006). A study of wastewater treatment with low grade calcium carbonate, Master's thesis, Seoul National University of Technology, pp. 55-60.
  14. Reynolds, C. S., Davies, P. S. (1974). Sources and bioavailability of phosphorus fractions in freshwaters: a British perspective. Biol. Rev., 76, 17-64.
  15. Zoltek, J. (1974). Phosphorus removal by orthophosphate nucleation. J. Water Pollut. Con. F., 46(11), 2498-2520.

Cited by

  1. 인 제거 입상소재를 적용한 여과수로 설계인자의 실험적 결정 vol.33, pp.1, 2017, https://doi.org/10.11001/jksww.2019.33.1.009