• Title/Summary/Keyword: 하수준설토

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A study of Geotechnical Property of Stone Filler and Sewage Dredged Soil as Construction Materials (하수준설토와 석분의 건설재료로 재활용을 위한 지반물성연구)

  • Chung, Jae-Wook;Jang, Yeon-Soo
    • Journal of Soil and Groundwater Environment
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    • v.12 no.4
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    • pp.8-15
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    • 2007
  • Geotechnical and environmental properties of stone fillers are analyzed by several laboratory experiment to identify the possibility of recycling fillers and sewage dredged soils as construction materials. The result of geotechnjical test shows that the sewage dredged soil is a sandy soil which contains 70-80% sand and is useful as an aggregate of construction site. Stone filler has large fine content, which may disqualifies the use as construction materials. However, this material is still useful as a filler in stone quarries or finished mines. From the environmental test, the liquids leached from two types of materials have satisfied the standard of chemical substances in the soil environment law and no harmful effect in ground pollution is expected when recycling.

A Basic Study on the Recycling of Dredged Sewage Sediment (하수도 준설토 재활용에 관한 기초 연구)

  • Kim, Hong Min;Choi, Yun Jeong;Yoon, Seok-Pyo;Kim, Jun Kyoung
    • Journal of the Korea Organic Resources Recycling Association
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    • v.26 no.3
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    • pp.33-37
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    • 2018
  • In order to recycle sewage dredging soil, we analyzed particle size distribution and organic content of dredged sewage sediments. Based on this, it was determined that particles with relatively low organic content of 1.0 mm or more could be recycled as fine aggregate. Although it was inorganic at the size of 5 mm or more, it contained a number of foreign substances other than fine aggregate, which were needed to be removed with a sieve. Since there are volatile suspended solids between 1.0 and 5.0 mm size, they were removed by means of flotation. Fine aggregate was obtained from dredging soil by screening followed with flotation method, and the proportion of fine aggregate obtained in this study was around 38 %.

지반공학 실험을 통한 하수준설토의 재활용방안 연구

  • Jang Yeon-Su;Jeong Jae-Uk;Ryu Hye-Rim
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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    • 2006.04a
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    • pp.230-233
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    • 2006
  • 국내에서는 매년 60만 톤의 하수슬러지가 준설된다. 현행법상 하수 준설토는 산업폐기물로 정의되며, 재활용되도록 강조되어진다. 그럼에도 불구하고 매입에 의한 처리로 낭비되고 있는 실정이다. 본 연구에서는 하수 준설토의 재활용 방안을 모색하기 위하여 지반 공학적 실험을 실시하였다. 실험 결과 준설된 순수한 하수 준설토의 경우 국내 건설용 성토재료 요구기준에 충분히 안정적인 것으로 나타났다.

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A Study on Design of Vacuum Silo for Batch Treatment System for Dredged Soil (준설토 일괄처리시스템을 위한 진공사이로 설계에 관한 연구)

  • Kim, Yong-Seok;Yang, Hae-Rim;Kim, Hac-Sun;Jeoung, Chan-Se;Yang, Soon-Yong
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.36 no.5
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    • pp.571-577
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    • 2012
  • In this study, a small movable batch treatment system for dredging soil deposited in a rain water tube is proposed; further, a vacuum silo sorting separation device with a vacuum silo, first-stage sorting separator, and conveyor is designed. The vacuum silo sorting separation device also consists of a storage tank, transferring screw, vacuum gate, screen bar, screen bar cleaner, and vacuum discharging device. In view of the fact that the flow of drawn air in the storage tank is a major factor influencing the sorting separation performance, the optimum shape of the tank is determined by CFD flow analysis. In addition, by using CAE structure analysis, the safety of a storage tank made of boards is examined. The specifications of the vacuum silo sorting separation device are determined by conducting mechanical and dynamic simulations of the driving mechanism of the vacuum silo sorting separation device through 3D-CAD modeling. Following this study, we will design a drum-screen-type second sorter, a decanter-type dehydration device, and waste water tank and pump as a secondary device. Further, on the basis of this design, we will construct a prototype model and carry out a field test.

Physical Properties of Dredged Sand Treated by Washing and Sorting Dredged Soil (하천준설토를 세척 선별한 준설모래의 물리적 특성)

  • Lee, Yun-Seong;Lee, Sang-Soo;Song, Ha-Young;Bae, Kee-Sun;Lee, Sung-Bok;Lee, Do-Heun
    • Land and Housing Review
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    • v.1 no.1
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    • pp.35-42
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    • 2010
  • Most of the dredged sand generated from the sewage pipe maintenance project and the government's four-river project are disposed depending on abandonment and filling-up. This is caused by the lack of related recycling technology using dredged sand appropriately and high absorption rate and micro-particles of dredged sand producted from existing sand production system. Thus, this study carried out a quality assessment for the dredged sand produced through the optimum washing and sorting system supplementing problems of existing dredged sand production system as a part of research to examine performance of removing micro-particles and foreign substances. As a result of the assessment, the dredged sand produced through the cleaning and sorting system showed a wide quality improvement effect in absorption rate, 0.08 mm sieve pass amount, clay lump volume and organic impurity content, and it turned out to satisfy both the quality standards of this study, KS F 2573(recycled aggregate for concrete) and KS F 2526(aggregate for concrete) so it could be confirmed that it would be able to be used as an aggregate for concrete in the future.