• Title/Summary/Keyword: Sewage construction

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Solidification of Sewage Sludge by PARAFIX (PARAFIX를 이용한 하수슬러지 고형화 방안)

  • 정하익;조진우;임재상;김상길
    • Proceedings of the Korean Geotechical Society Conference
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    • 2001.03a
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    • pp.611-616
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    • 2001
  • Increased quantities of sewage sludge coupled with stringent regulations make it important to develope alternatives for residuals management. The use of PARAFIX as a solidifying agent for sewage sludge was investigated by several tests. Basic physicochemical characteristics, strength, permeability, and leaching characteristics were examined. PARAFIX was found to be very effective in reducing permeability, increasing strength, and immobilizing heavy metals. Based on the tests, it Is ascertained that PARAFIX enhances the solidification of sewage sludge. Also sewage sludge solidified with PARAFIX may be used effectively for construction materials.

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Development of Effective Management System for the Sewerage Work (하수도 공사의 효율적 관리를 위한 공사 관리시스템 개발)

  • Jung Sung-Heuk;Lee Jea-Kee;Choi Seok-Keun
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.24 no.1
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    • pp.73-78
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    • 2006
  • Cheongju city is executing a basic sewage maintenance plan for the systematic understanding of the sewage facilities, efficient preservation management, and reformation of the existent sewage facilities, in order to prevent the contamination of water and to preserve the neighboring environments. The new business constitute approximately 6% of the entire facility production, and renovation business constitute approximately 1.5% every year according to the statistics information of the last five years. This research provides effectiveness and reliability for sewage construction, and improvement in service for the civilians, through the efficient management of various documents, construction fees, design drawings, photographs, and construction background for the annually made constructions with the development of the effective management system for the sewage work.

Development of Antimicrobial Concrete for Sewage Structures and Application to Construction Field (하수구조물용 항균콘크리트의 개발 및 현장적용)

  • Kim Moo-Han;Kim Gyu-Yong;Lee Eui-Bae;Lee Seung-Hoon;Sohn Yu-Shin
    • Journal of the Korea Institute of Building Construction
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    • v.6 no.3 s.21
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    • pp.91-97
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    • 2006
  • Sewage facilities are positively necessary for environment improvement such as rainwater removal, sewage disposal, preservation of the qualify of water and health of the citizens in present-day. Meanwhile, a deterioration of the concrete sewer pipe is increasing rapidly due to the chemical and physical attack and especially biochemical attack that is to say biodeterioration. In this study, researches for the development of antibiotics and antimicrobial concrete were conducted to reduce biochemical corrosion of sewage concrete. First of all, desired performance, such as watertightness, antibiosis, homogeneity, workability and harmlessness, was proposed and performance of antibiotics and antimicrobial concrete were evaluated by them. And developed antimicrobial concrete was applied to actual construction field. As results of this study, dispersibility and antibiosis of liquid antibiotics superior to powdery antibiotics. Antibiosis of antimicrobial concrete was verified, and amount of elution of harmful and effective ingredients was little. In workability, setting time of antimicrobial concrete was delayed. Compressive strength and resistance to carbonation of antimicrobial concrete were more increased than ordinary concrete. Finally, as there were no problems in quality and construction progress of antimicrobial concrete produced in plant, applicability of antimicrobial concrete to actual construction field was verified.

A Study on Development of Construction Material using Sewage Sludge Ash (하수슬러지 소각재를 이용한 건설자재 개발에 관한 연구)

  • Jo Byung-Wan;Shin Kyung-Chul;Park Jong-Bin
    • Proceedings of the Korea Concrete Institute Conference
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    • 2004.11a
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    • pp.687-690
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    • 2004
  • The discharge of sewage sludge ash that is rapidly increasing in Korea. The utilization of sewage sludge ash would contribute to the elimination of an environmental problem and to the development of new high-performance materials. So the paper is focused on an experimental study in order to investigate the utilization of sewage sludge ash as the construction materials. It achieves leaching test, chemical composition and compressive strength test. As a result of tests, the sewage sludge ash has sufficient potential for use of pozzolanic raw material. However. it is judged to be available to construction material if research is continuously gone.

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Gas Transmit Characteristic of Waste Recycling a Large Landfill Cover (폐기물 재활용 대형복토재의 가스투과 특성)

  • Jung, Ha-Ik;Song, Bong-Joon;Kim, Sang-Keun;Kang, Suk-Joo;Lee, Jae-Young
    • Proceedings of the Korean Geotechical Society Conference
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    • 2005.03a
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    • pp.1396-1399
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    • 2005
  • Gas permeability of the solidified sewage sludge needs to be characterized in order to use as a large-scale landfill cover material. Four different types of the samples were prepared for gas permeability experiments: (1) granite soil, (2) dried sewage sludge, (3) solidified sewage mixed with slag and (4) solidified sewage mixed with granite soils. The experimental instrumentation and measurement devices were newly designed and created to effectively evaluate gas permeability of the samples.

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Application and Adequacy Evaluation of Mobile Sewage Treatment Facilities for Concrete Wastewater Treatment Generated during Construction (공사 중 발생되는 콘크리트 폐수처리를 위한 이동식 오수처리 시설의 적용 및 적정성 평가)

  • Wooseok Jeong;Kyungik Gil
    • Journal of Wetlands Research
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    • v.25 no.2
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    • pp.91-98
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    • 2023
  • Some concrete wastewater generated during construction is in the form of non-point pollution sources that workers, managers, and users are unaware of, and it is not easy to manage as it flows through sewage pipes. Due to these characteristics, construction sludge is inflow into rivers and sewage pipes in the form of non-point pollution sources in an unmanaged state. This study applied the D.W.S method to the concrete retaining wall removal method installed on the road, and the resulting concrete wastewater was physically and chemically treated through a mobile sewage treatment facility, and it was examined whether it met the removal efficiency and wastewater discharge acceptance standards. Accordingly, it is intended to meet the standards for effluent concentration of wastewater during construction by removing 73.5% of BOD and 89.1% of SS through physical and chemical treatment through portable sewage treatment facilities during construction. In addition, we would like to review the adequacy and economic analysis of calculating environmental conservation costs for physicochemical treatment through portable sewage treatment facilities and sewage treatment generated during construction.

Use of Sewage Sludge Ash for Construction Material (건설재로서 하수슬러지 소각재의 활용)

  • Lee, Cheo-Keun;Ahn, Kwang-Kuk;Heo, Yol
    • Journal of the Korean GEO-environmental Society
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    • v.4 no.4
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    • pp.25-34
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    • 2003
  • This paper is focused on an experimental study in order to investigate the utilization of sewage sludge ash as the cover and liner materials for the waste disposal landfill or as construction materials. A series of tests were performed to evaluate the basic properties, compaction, compressive strength, consolidation, permeability, and CBR of sewage ash. Specially, clay bricks were made as increasing replacement ratio of sewage ash (such as 5, 10, 15, 20, 25, 30%). And tests were fulfilled for its quality. Bentonite and lime were used as the additives to improve permeability properties of sewage sludge ash. As a result of tests, it was shown that the permeability coefficient decreases as increasing bentonite content and the percentage of bentonite was roughly needed 20% to keep the permeability coefficient below $1{\times}10^{-7}cm/sec$. The results of unconfined compression tests show that sewage ash meets the criteria of the unconfined compression strength for cover material. It was shown that the compressive strength decreases as increasing the replacement ratio of sewage sludge ash and the maximum replacement ratio of sewage sludge ash to satisfy the quality standards of the third degree bricks was about 15%.

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A study on Quantitative Supply of Sewage Sludge for Co-Incineration of Municipal Solid Waste and Sewage Sludge(II) - Based on Actual Incineration Plant (하수슬러지와 생활폐기물 혼합소각시 하수슬러지 정량공급에 관한 연구(II) - 실증플랜트 중심으로)

  • Cho, Jae-Beom;Kim, Woo-Gu;Jang, Hoon
    • Journal of Korean Society of Environmental Engineers
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    • v.35 no.12
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    • pp.960-966
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    • 2013
  • In this study, operation data from an actual plant in M city were analyzed to evaluate effects of water supply into sewage sludge on the co-incineration of municipal solid waste (MSW) and sewage sludge. Design capacity of the stoker incinerator is 50 m3/day. Maximum portion of sewage sludge in the total waste input was 20%. According to this research, moisture content increase up to 85% of sewage sludge could be possible by water supply on MSW input to the incinerator. Therefore, stable operation of incinerator could be achieved. As water was added into sewage sludge up to 85%, input quantity of sewage sludge to frequency (Hz) was similar to theoretical input. Also, it is concluded that stable management of incinerator without leachate combustion and damages of refractory bricks and castable could be achieved by the reduction of low heating value.

Analysis of Process and Operating Characteristics for Chung Nam Province Sewage Treatment Plants (충청남도 하수처리시설의 공정 및 운영 특성 분석)

  • Oa, Seong Wook;Lee, Sang Jin
    • Journal of Korean Society on Water Environment
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    • v.25 no.4
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    • pp.553-559
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    • 2009
  • Currently, small scale sewage works are getting increase in Chung Nam Province and it is strongly required for those plants to get the information of optimized procedures and technologies. Most processes for sewage works in Korea were designed for large scale plants, so many difficulties are observed in small scale sewage works. This study was conducted to evaluate the propriety of O&M and construction cost for sewage treatment plants in Chung Nam Province. The treatment results and process stability of 32 public sewage treatment plants were also investigated. It is expected to provide optimum O&M and construction cost for future small scale sewage works and improving projects of existing plants by these results. Pollution problems caused by small scale plants are usually restricted to small areas; however, in view of the high cost per unit population, treatment requirements and alternatives have to be studied carefully. In comparison to larger plants, more pronounced and different boundary conditions such as unstable influent load, per capita costs and a large variety of feasible treatment and disposal systems were considered.

A Study on Quantitative Supply of Sewage Sludge for Co-Incineration of Municipal Solid Waste and Sewage Sludge (하수슬러지와 생활폐기물 혼합소각시 하수슬러지 정량공급에 관한 연구 - Batch Test 중심으로)

  • Cho, Jae-Beom;Kim, Woo-Gu;Yeon, Kyeong-Ho;Shin, Jung-Hun
    • Journal of Korean Society of Environmental Engineers
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    • v.35 no.1
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    • pp.64-69
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    • 2013
  • The various promotion countermeasures such as solidification, carbonization, and the creation of cement materials have been considered to existing treatment methods such as incineration and the creation of composts, since direct landfill was prohibited for encouraging the recycling based on the sludge treatment on land. The Main objective of this study is to investigate the feasibility of co-incineration for MSW (municipal solid waste) and SS (sewage sludge) through the quantitative supply of sewage sludge. In this study, optimum water content to operate normally incinerator is 85%. In order to increase the workability of sewage sludge, it is necessary to supply properly water. In the case study of sites, optimum water content is 87% due to the water evaporation. Therefore, it was found that the water content up to 87% would be reached the stable operation of co-incinerator on the mixture of municipal waste solid and sewage sludge.