• Title/Summary/Keyword: Specified wastes

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A Study on the Appropriate Management of Specific Hazardous Industrial Waste (특정유해산업폐기물의 적정관리에 관한 연구)

  • 양재윤;김원만;박재주
    • Environmental Analysis Health and Toxicology
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    • v.6 no.1_2
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    • pp.83-93
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    • 1991
  • The specified industrial wastes increased 26% annually during the last 5 years from 1984 to 1988 in Korea, and the special treatment and proper management are required. The effective methods are studied on the process of generation, keeping, transportation, and treatment/disposal for specified industrial wastes and materials. Also, in this paper, the author describes the plans to develop the public disposal facilities and manage specific industrial waste properly in Korea.

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Leaching Characteristics of Unregulated Heavy Metals in Specified Wastes (지정폐기물 중 미규제 중금속류의 용출 특성)

  • Jeon, Tae-Wan;Shin, Sun-Kyoung;Lee, Jeong-Ah;Kim, Hyoung-Seop
    • Journal of Korean Society of Environmental Engineers
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    • v.30 no.2
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    • pp.213-217
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    • 2008
  • The objective of this research is to investigate the leaching characteristics of unregulated heavy metals such as Ni, Zn, Ba, Be, Sb, Se, V in specified waste. 108 waste samples which were taken from the representative facilities emitting hazardous substances, were analyzed. The rate of leaching of heavy metal was measured using an official test method. From the results, wastewater treatment sludge and dust contained much Ni, and Zn was detected in all samples. Dust and waste catalyst producted from petroleum-refining process tended to reveal V in high concentration. Ba, Be, Sb, Se showed low concentration, but require additional analyses of waste generated at different industries.

Evaluation of analytical methods for several metals and fluoride by certified reference materials (인증표준물질을 이용한 중금속류와 플루오르화물 전처리방법 비교 연구)

  • Jeon, Tae Wan;Chung, David;Shin, Sun Kyoung;Choi, Hun Geun;Chung, Young Hee
    • Analytical Science and Technology
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    • v.19 no.2
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    • pp.172-180
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    • 2006
  • This study was performed to establish new methods for hazardous substances and to develop an analytical method in specified wastes for preventing the environmental pollution caused by hazardous wastes. Therefore, the trends of international management, regulatory criteria, and items of hazardous wastes in various countries were investigated. Based on this study, target priority of new hazardous substances in specified wastes was established. An analytical method was developed using the waste standard reference materials of sludge, oil, bottom ash, etc., which contain the new hazardous substances (Ba, Be, Cr(VI), F, Ni, Sb, Se, and V). A total of 37 waste samples from the representative facilities, which are emitting new hazardous substances, were analyzed.

Decomposition Characteristics of Non-Degradable Liquid Waste under High Temperature and High Pressure Conditions (고온 고압 조건에서의 난분해성 액상폐기물 분해 특성)

  • Lee, Gang-Woo;Shon, Byung-Hyun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.8 no.6
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    • pp.1572-1578
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    • 2007
  • The specified wastes consist of waste acid, waste alkali, waste oil, waste organic solvent, waste resin, dust, sludge, infectious waste, and others. Among these specified wastes, a great portion is liquid phase wastes. The purpose of this study is to develop the high temperature and high pressure (HTHP) treatment system for decomposition of the liquid phase specified waste (LPSW). For this, we analyzed the physical and chemical properties of the LPSW such as density, proximate analysis, ultimate analysis, heating values, and designed 0.3 ton/day HTHP treatment system. The LPSW tested in this experiment were prepared by adding TCE(trichloroethylene) and toluene to liquid phase waste which was brought into the commercial waste treatment company. The average density of waste oil (25 samples), waste resin (5 samples), and waste solvent (12 samples) was 0.99 g/mL, 0.91 g/mL, and 0.93 g/mL, respectively. And the average lower heating value of waste oil, waste resin, and waste solvent was 8,294 kcal/kg, 5,809 kcal/kg, and 7,462 kcal/kg, respectively. The DRE (Destruction & Removal Efficiency) of TCE and toluene were 99.95% and 99.73% at atmospheric pressure conditions and that were 99.99% and 99.82% at pressurized conditions, respectively. These results showed that TCE/toluene mixtures were properly decomposed over about 99.73% of DRE by the HTHP treatment system and pressurized conditions were more effective to destroy those pollutants than atmospheric pressure conditions. Also these systems could be directly applied to industries which try to treat the liquid phase specified waste within the regulation limit.

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Review and Application of the Radioactive Waste Certification Program (방사성폐기물 인증프로그램의 검토 및 적용)

  • Chung Hee-Jun;Whang Joo-Ho;Lee Jae-Min;Kim Heon;Jeong Yi-Yeong
    • Proceedings of the Korean Radioactive Waste Society Conference
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    • 2005.11a
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    • pp.126-133
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    • 2005
  • Securing of radioactive waste disposal site and the related operations for disposal of low and intermediate level radioactive waste is being actively carried out in Korea. For disposal of radioactive wastes, physicochemical and radiological status and integrity of radioactive wastes must be secured first. Also, waste generators must provide this information to disposers. In addition, to secure the safety of waste disposal, waste acceptance criteria (WAC) and site specific waste acceptance criteria (SWAC) to consider characteristics of the disposal site are required. Radioactive wastes must be processed, generated, managed and transferred in accordance with these criteria. [1] For this, evaluation of properties on each of the radioactive wastes must be performed. However, in reality, atomic power plants are experiencing difficulties in relation to this due to the large quantity of radioactive waste generation. In order to solve this problem, IAEA and major overseas countries have developed, thus are using waste certification program (WCP) and quality assurance program (QAP) [2,3]. On the basis of these programs, radioactive waste certification program has been developed for safe disposal of radioactive wastes in Korea to satisfy the provisions specified in 'low and intermediate level radioactive waste transfer guidelines' of announcement No. 2005-18 from the Ministry of Science and Technology and specific site waste acceptance criteria (tentative plan). In addition, it is being planned to administer amendment on commercial atomic power plant related procedures and ensile staff training in order for early introduction and operation of radioactive waste certification system.

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Field Test Assessment of Biological Recovering Agent for treating Oil Contaminated Soil (생물학적 유류오염토양 복원제의 현장 적용성 평가)

  • Kim, Soo-Hong;Song, Seung-Koo;Suh, Jung-Ho
    • KSBB Journal
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    • v.25 no.1
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    • pp.73-78
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    • 2010
  • In this study, recovering agent was produced with organic sludge and modified peat moss (MPM) in pilot plant mixer to recover oil contaminated soil, and field test of it was estimated using landfarming method. Oil contaminated soil recovering agent was thought to contain more microorganisms than raw waste sludge and was no problem to come onto the market because there were not any items of specified wastes. According to the results of TPH variation with time, it was observed the initial degradation velocity of oil with produced recovering agent was rapid up to 50% after 4 days, remarkably. Because the microorganisms in the organic sludge discharged from chemical plant already acclimated with oil, therefore, it could be estimated initial degradation velocity of recovering agent might be rapid. It was concluded that the oil contaminated soil recovering agent produced in this study have high marketability because of its two aspects on recycling of wastes and initial rapid degradation capacity.

Drying methods for municipal solid waste quality improvement in the developed and developing countries: A review

  • Tun, Maw Maw;Juchelkova, Dagmar
    • Environmental Engineering Research
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    • v.24 no.4
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    • pp.529-542
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    • 2019
  • Nowadays, drying methods for municipal solid waste quality improvement have been adopted in the developed and developing countries to valorize wastes for a renewable energy source, reduce dependency on fossil fuel and keep safer disposal at landfills. Among them, biodrying, biostabilization, thermal drying and solar drying are the most common. Drying of municipal solid waste could offer several environmental and economic benefits. Therefore, this review highlighted the drying methods for municipal solid waste quality improvement around the world and compared them based on the reduction of moisture, weight and volume of municipal solid wastes against drying temperature and time by using statistical analysis. It was observed that the drying temperature of different drying methods accounted for 115 ± 40℃ for thermal drying, 59 ± 37℃ for solar drying, 55 ± 15℃ for biodrying and 58 ± 11℃ for biostabilization. Among the drying methods, thermal drying provided the shortest drying time. The moisture reduction, weight reduction, volume reduction and heating value increase of municipal solid waste could vary with drying temperature and time. Finally, the benefits and drawbacks of different drying methods were specified, and recommendations were made for the future efficient drying.

Evaluation of analytical methods for heavy metals and cyanide by certified reference materials (인증표준물질을 이용한 중금속류와 시안화물 전처리방법 비교 연구)

  • Chung, David;Jeon, Tae Wan;Shin, Sun Kyoung
    • Analytical Science and Technology
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    • v.19 no.2
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    • pp.163-171
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    • 2006
  • This study was performed to develop an analytical method in specified wastes for preventing the environmental pollution from hazardous wastes. Few analytical methods were developed using the waste standard reference materials of sludge, waste oil, bottom ash, etc. which contain As, CN, Cd, Cr, Cu, Pb, and Hg compounds. The pre-treatment method was considered by whether or not the synchronous analysis is possible. Waste samples obtained from the 34 representative facilities, which are emitting the hazardous substances, were analyzed.

Decomposition of Liquid Wastes(Waste Oil & Solvents) under High Temperature Conditions (산업단지 발생 액상폐기물(폐유와 폐유기용제)의 고온연소 특성)

  • Kim, Min-Choul;Lee, Jae-Jeong;Suk, Min-Kwang;Lee, Gang-Woo;Shon, Byung-Hyun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.10 no.12
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    • pp.3761-3767
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    • 2009
  • This study was investigated to determine the combustion characteristics, decomposition efficiency, and the flue gas concentrations after combustion in the high temperature reactor($1,250{\sim}1,400^{\circ}C$, 1 atm) for the liquid wastes(waste oil and waste solvent) generated from the industrial complex. The concentration of nitrogen oxide(NOx) is decreased and the synthetic gas is increased when the mass ratio of $O_2$/waste is about 1.53 because the reaction condition was changed to reduction state. And BTEXs(benzene, toluene, ethylbenzene, xylene) are decomposed more than 99.99%. If the highly concentrated liquid waste (waste oil and waste solvent) is treated under the operating conditions suggested by this study, our treatment method for the liquid waste was found to be proper because of the contaminants emission concentration is very low. In addition, the synthetic gas after combustion can be used as an alternative fuel.

Characteristics of Regulated Heavy Metals Content in Wastes Emitted from Industrial Processes (산업공정폐기물 중 규제대상 중금속류의 함량 특성)

  • Jeon, Tae-Wan;Lee, Dong-Jin;Yoon, Jung-In;Oh, Gil-Jong;Hwang, Dong-Gun
    • Journal of Korean Society of Environmental Engineers
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    • v.31 no.6
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    • pp.449-453
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    • 2009
  • This study focused on the content characteristics of regulated hazardous substances in specific wastes. Regulated heavy metal such as Cu, Pb, Cd analyzed the 108 waste samples that it choice from the representative facilities. Analytical method used content test method, suggested on the basis of analytical method of developing country, and the results as compared with limited standard in Austria Petroleum, primary metalworking and electronic industry had high content of Cu more than 100 mg/kg of Austria limited standard. Pb detected high level concentration the sample that dust producted at Primary metalworking industry. In case of total Cr was show that high content at KSIC 18, 19, 23 etc but result analyzed Cr(VI), it was shown that high level at dust producted from sewing clothes and fur industry.