DOI QR코드

DOI QR Code

Development and experimental verification of vortex typed nonfilter nonpoint source pollution reduction device

와류형 미필터 비점오염저감장치의 개발과 실험적 검증

  • 장석환 (대진대학교 건설시스템공학과) ;
  • 이재경 (대진대학교 공학교육혁신센터) ;
  • 이해광 (대진대학교 건설시스템공학과) ;
  • 황성규 (이노블루산업(주))
  • Received : 2018.08.23
  • Accepted : 2019.03.15
  • Published : 2019.04.30

Abstract

The objective of this study was to develop and verify an effective vortex typed nonfilter nonpoint source pollution reduction device. To verify this pollution reduction device, a total of twelves scenarios (three rainfall intensities${\times}$two states${\times}$two steps) of experiments were conducted using pollutants. First, simulated inflow (rainfall intensity 2.5 mm/hr: $0.00152m^3/s$, rainfall intensity 3.395 mm/hr: $0.00206m^3/s$, rainfall intensity 6.870 mm/hr: $0.00326m^3/s$) was calculated. Second, pollutants (mixture of 25% of four particle sizes) were selected and injected. Third, pollutant removal efficiencies of this device at its initial state and operating states were measured. As a result of analysis based on rainfall intensity, the concentration of pollutants was decreased by the device at initial and operating states at all rainfall intensities. Its pollutant removal efficiency was more than 80%, the standard set by the Ministry of Environment. Its pollutant removal efficiency was gradually increased over time, reaching approximately 90%. Its pollutant removal efficiency was higher in its operating state than that in its initial state. Therefore, nonpoint source pollutants can be effectively removed by this vortex typed nonpoint source pollution reduction device developed in this study.

본 연구에서는 효율적인 와류형 미필터 비점오염저감장치를 개발하고 검증하였다. 저감장치의 검증을 위해 오염물질을 이용하여 총 12개 형태(3개 강우강도${\times}$2개 상태${\times}$2개 단계)의 실험을 진행하였다. 실험은 (1) 모의유입량 산정(강우강도 2.5 mm/hr: $0.00152m^3/s$, 강우강도 3.395 mm/hr: $0.00206m^3/s$, 강우강도 6.870 mm/hr: $0.00326m^3/s$); (2) 오염물질 채취 및 투입(4개 입경 사이즈의 25%씩 혼합); (3) 오염물질 제거효율 측정으로 구성하였고, 장치 초기상태와 운영상태로 구분하여 수행되었다. 강우강도별로 분석한 결과, 모든 강우강도에서 초기상태 및 운영상태 모두 오염물질 농도가 감소하였으며, 유입수 대비 유출수 오염물질 제거효율에서도 오염물질을 환경부 기준 80% 이상 제거하는 결과를 보였다. 특히 제거효율이 시간이 지남에 따라 서서히 증가하여 약 90%를 상회하였으며, 초기상태보다 운영상태에서 오염물질 제거효율이 더 높은 것으로 나타났다. 따라서 본 연구에서 개발한 와류형 미필터 비점오염저감장치로 효율적인 비점오염원을 제거할 수 있음을 증명하였다.

Keywords

SJOHCI_2019_v52n4_265_f0001.png 이미지

Fig. 1. Concept of the vortex typed nonfilter nonpoint source pollution reduction device

SJOHCI_2019_v52n4_265_f0002.png 이미지

Fig. 2. Operation principle in the first step of the vortex typed nonfilter nonpoint source pollution reduction device

SJOHCI_2019_v52n4_265_f0003.png 이미지

Fig. 3. Flowchart of experimental verification of the reduction device

SJOHCI_2019_v52n4_265_f0004.png 이미지

Fig. 4. Flowchart of water supply and circulation system

SJOHCI_2019_v52n4_265_f0005.png 이미지

Fig. 5. Description of the pollutant selection

SJOHCI_2019_v52n4_265_f0006.png 이미지

Fig. 6. Sheer plan and plane figure of stainless hopper

SJOHCI_2019_v52n4_265_f0007.png 이미지

Fig. 7. Assumption of pollution device states

SJOHCI_2019_v52n4_265_f0008.png 이미지

Fig. 8. Comparison of SS concentration and efficiency results for rainfall intensity 2.5 mm/hr

SJOHCI_2019_v52n4_265_f0009.png 이미지

Fig. 9. Comparison of SS concentration and efficiency results for rainfall intensity 3.395 mm/hr

SJOHCI_2019_v52n4_265_f0010.png 이미지

Fig. 10. Comparison of SS concentration and efficiency results for rainfall intensity 6.870 mm/hr

SJOHCI_2019_v52n4_265_f0011.png 이미지

Fig. 11. Comparison of the pollutant removal efficiency

Table 1. Selection of rainfall intensities for experimental verification

SJOHCI_2019_v52n4_265_t0001.png 이미지

Table 2. Experimental verification results for rainfall intensity 2.5 mm/hr

SJOHCI_2019_v52n4_265_t0002.png 이미지

Table 3. Experimental verification results for rainfall intensity 3.395 mm/hr

SJOHCI_2019_v52n4_265_t0003.png 이미지

Table 4. Experimental verification results for rainfall intensity 6.870 mm/hr

SJOHCI_2019_v52n4_265_t0004.png 이미지

References

  1. Choi, J. S., and Lee, J. M. (2016). "Standards of non-point source pollutant and trend of techology." Water for Future, Vol. 46, No. 6, pp. 83-88.
  2. Jung, C. G., Paar, J. Y., Kim, S. H., and Kim, S. J. (2012). "A study on the reduction of non-point source pollution loads from small agricultural watershed bt applying surface covering scenario using HSPF model." Proceeding of Korean Water Resources Association, p. 103.
  3. Keshavarzi, A. R., and Gheisi, A. R. (2006). "Trap efficiency of vortex settling chamber for exclusion of fine suspended sediment particles in irrigation canals." Irrigation and Drain, Vol. 55, No. 4, pp. 419-434. https://doi.org/10.1002/ird.263
  4. Kim, D.-I., Kim, K.-M., Han, K.-Y., and Park, T.-W. (2012). "Nonpoint source quantitative analysis using watershed model in Nakdong River." Proceeding of Korean Water Resources Association, p. 782.
  5. Lee, H. S., Choi, G. W., and Kim, N. G. (2013). "The analysis of characteristic of efficiency in the diffusion pollution improvement facilities with vortex type according to detention time." Crisisonomy, Vol. 9, No. 3, pp. 127-136.
  6. Lee, Y. B. (2010). A Study on the selection and application of pollution mitigation facility for highway runoff. Doctoral Thesis, Kwangwoon University.
  7. Ministry of Environment (2006). Manual for the nonpoint source pollution management. Ministry of Environment.
  8. Ministry of Environment (2016). Manual for installation, management, and operation of the nonpoint source pollution facility. Ministry of Environment.
  9. National Institute of Environmental Research (2013). Research for the design rainfall and runoff estimation method. No. 20130617940-00.
  10. Paul, T. C., Sayal, S. K., Sakhuja, V. S., and Dhillon, G. S. (1991). "Vortex-settling basin design considerations." Journal of Hydraulic Engineering, Vol. 117, No. 2, pp. 172-189. https://doi.org/10.1061/(ASCE)0733-9429(1991)117:2(172)
  11. Shin, D. B. (2007). A Study on optimization of the non-point pollution source reduction facility for the performance assessment of spiral-precipitation tank. Master's Thesis, The University of Suwon.
  12. Shin, H. S., Kim, M. E., Kim, J. M., and Jang, J. K. (2015). "Analysis on load of non-point source from sewage treatment districts in Nakong River." Journal of Korean Water Resources Association, Vol. 48, No. 6, pp. 695-709. https://doi.org/10.3741/JKWRA.2015.48.9.695