Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Development and Field Application of an Amphibious Scrubbing/Suction Dredging Machine with Cylindrical Rotating Brush and Turbidity Barrier

회전브러쉬와 혼탁방지막을 활용한 수륙양용형 Scrub/흡입 준설장치의 개발과 현장적용

  • Received : 2017.08.10
  • Accepted : 2017.08.25
  • Published : 2017.09.30
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Abstract

An amphibious scrubbing/suction dredging machine with cylindrical rotating brush, housing, and turbidity barrier was newly-developed to remove both sediments with about 10 cm thickness and periphyton attached on various structures in urban water-circulating systems through the scrubbing, suction, and dredging processes. Based on the field application and long-term monitoring, the increase in both suspended solids (SS) and turbidity of water during the scrubbing, suction, and dredging processes was negligible (p>0.05). In some cases, the turbidity of water initially increased, however, the turbidity was stabilized within 20 minutes from the start of dredging processes. The concentration changes in TN and TP of water were not statistically different (p>0.05) before and after the scrubbing, suction, and dredging processes, indicating that benthic nutrients released from sediments were not significantly diffused, and were not supposed to cause significant water pollution. Also, water treatment facilities along with an amphibious scrubbing/suction dredging machine could be more effective since the removal of contaminant loadings through the scrubbing, suction, and dredging processes was much greater than that through simple coagulation/precipitation processes. Finally, GPS-based realtime tracking and operation program have been developed and applied in various urban water-circulating systems, and development of driver cooperative autonomous driving system is in progress to eliminate the need for manual driving of an amphibious scrubbing/suction dredging machine.

도시물순환시스템 내 10 cm 내외로 퇴적된 오염물질과 자갈이나 다양한 구조물에 부착된 부착조류와 협잡물을 쓸어내어(scrubbing) 제거가 가능하며, 오염물질이 주변으로 방출 확산되어 수체의 2차 오염을 방지할 수 있는 덮개(housing)와 혼탁 방지막(turbidity barrier)이 설치된 회전 브러쉬(rotating brush)를 활용한 저혼탁 scrub/흡입(suction)방식의 수륙양용형 퇴적토 준설장치를 개발하였다. 현장적용 검증을 통해, 저수위와 고수위에서 저혼탁 scrub/흡입 준설장치를 이용해 준설 중 수체 내 부유물질(SS)과 탁도(turbidity)의 증가는 매우 미미하며(p>0.05), 일부 부유물질로 인해 발생한 탁도도 준설 후 20분 이내에 빠르게 안정화되는 것으로 조사되었다. 총질소(TN)와 총인(TP)의 농도도 준설 전, 준설 중과 준설 후에 농도 변화가 시간대별 및 수심별로 통계학적으로 유의한 의미는 없는 것으로 조사되어(p>0.05), scrub/흡입 준설을 통해 호수 저면에 축적된 영양염류가 확산되어 수체오염을 유발하지 않는 것으로 조사되었다. 또한, 저혼탁 scrub/흡입 준설장치의 직접 준설을 통한 오염물질 제거량이 수처리시설의 운영을 통한 오염물질 제거량 대비 높은 것으로 산정되어, 수처리시설과 저혼탁 scrub/흡입 준설의 연계 적용이 도시물순환시스템의 수질관리에 효율적인 것으로 평가되었다. 최근에는 GPS 기반 실시간 scrub/흡입 준설장치의 추적 및 유지관리 프로그램을 개발해 등록하고 다양한 도시물순환시스템에 현장 적용하였으며, 추가적으로 준설장치 운전자를 보조 또는 제한된 환경에서 스스로 운전하는 협력형 주행시스템(driver cooperative autonomous driving system)의 개발을 현재 진행 중이다.

Keywords

References

  1. Song, H. M., Optimal water quality management for Ilsan lake, KICT, pp. 20-60(1997).
  2. Land Housing Institute, A guide for construction of lake and pond with ecological concept, LHI(2003).
  3. Joo, J. C., Design and management of urban water-circulating systems in Gwangju-Chonnam innovation city, KICT, pp. 2-40(2009).
  4. Choi, J. S. and Lee, J. M., A study on introduction plan of water circulation facilities considering site-condition, LHI, pp. 11-48(2016).
  5. Korea Water Re1sources Corporation, Engineering Technologies for High Efficiency Green-tide Harvesting System and Microalgal Biomass to Convert Renewable Resources at the Water-Bloom of River, K-water(2014).
  6. Kim, M. K., Moon, B. R., Kim, T. K. and Zoh, K. D., "A Study on Production & Removal of Microcystin, Taste & Odor Compounds from Algal bloom in the Water," The Korean J. Public Health, 52, 33-42(2015).
  7. Zhou, J. J. and Lim, B. S., "Characteristics of Water Quality Change of Urban River according to Installation of Interceptors and Wastewater Treatment Plant," J. Korean Soc. Environ. Eng., 36(12), 813-820(2014). https://doi.org/10.4491/KSEE.2014.36.12.813
  8. Byeon, K D., Kim, G. Y., Lee, I., Lee, S., Park, J., Hwang, T. and Joo, J. C. "Investigation and Evaluation of Algae Removal Technologies Applied in Domestic Rivers and Lakes," J. Korean Soc. Environ. Eng., 38(7), 387-394(2016). https://doi.org/10.4491/KSEE.2016.38.7.387
  9. Park, J. B. and Kim, S. J., "The Present Status of Dredging for Domestic Contaminated Sediment," The Korean J. Civil Eng., 55(4), 58-65(2007).