• Title, Summary, Keyword: Waste incineration

Search Result 328, Processing Time 0.038 seconds

Analysis of Heavy Metal Concentration on Working Clothes for Waste Incinerating Workers (생활폐기물 소각장 작업복의 중금속 분석)

  • Park, Soon-Ja
    • The Korean Journal of Community Living Science
    • /
    • v.18 no.1
    • /
    • pp.39-53
    • /
    • 2007
  • The purpose of this study was to determine the characteristics of an experimental protective clothing material with regard to comfort and isolation from the hazardous heavy metals produced in municipal waste incineration. An analysis was conducted on the total concentrations of heavy metals in some parts such as surface, middle layer, and interior for the treated fabric, and the untreated one, and working clothes. We conclude that the processed fabric with charcoal for working clothes showed the least exposure to heavy metals of the three. Working clothes worn by workers during waste incineration were much more contaminated than the untreated and treated materials. The material of working clothes could be chosen according to the function with regard to its original chemical characteristics, which are the proper results of the dyeing process. The processed fabric material has high degrees of moisture regain, thermal insulation, water vapor penetration, and antibacterial function; consequently, it is much more comfortable to wear. The fabric material proposed in this research contributed much more to blocking heavy metal concentrations (such as Cd, Pb, Cu, Cr, Zn, Mn) than did the fabric of working clothes at present. Consequently, we strongly suggest that the material of working clothes be upgraded by adopting the above-mentioned charcoal-processed fabric. Materials of working clothes must be improved to increase comfort and prevent harmful gas, flying dust, and heavy metals from permeating the fabrics.

  • PDF

Study on the heavy metal stabilization by dosing of chelate on the bottom ash (소각재에서의 용출억제제를 이용한 중금속 안정화에 관한 연구)

  • Jang, Hyeon-Jong;Kim, Seong-Jung
    • Journal of the Korea Organic Resources Recycling Association
    • /
    • v.17 no.4
    • /
    • pp.81-90
    • /
    • 2009
  • About 35 domestic incinerators are being operated currently. There is waste management policy to reuse waste efficiently and reduce waste through incineration which include reuse, recycling and energy recovery. However, there is a critical social issue that some heavy metals(Cu, Pb) were found in bottom ash from incineration of waste. After incineration, bottom ash is treated with chemicals to prevent second pollution of heavy metals from bottom ash and increase efficiency of heavy metal stabilization.

  • PDF

The Feasibility of Co-Incineration for Municipal Solid Waste and Sewage Sludge through the Change of Heat Loading and Atmospheric Pollutants Loading (하수슬러지와 생활폐기물 혼합소각시 열부하 변화 및 대기오염물질 부하 변화를 통한 혼합소각 가능성에 관한 연구)

  • Cho, Jae-Beom;Kim, Woo-Gu;Yeon, Kyeong-Ho;Shin, Jung-Hun
    • Journal of Korean Society of Environmental Engineers
    • /
    • v.34 no.9
    • /
    • pp.583-589
    • /
    • 2012
  • 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 change of heat and atmospheric pollutants. In this study, LHV (Low Heating Value) is 100~300 kcal/kg because the MC (Moisture Content) of de-hydrated sewage sludge is approximately 80%. From the results, we knew the feasibility of co-incineration for MSW (80%) and SS (20%). As the co-incineration rate of SS up to 20% became higher, the loading of heat and atmospheric pollutants was not influenced.

A Numerical Simulation of Hazardous Waste Destruction in a Dump Incinerator (덤프 소각기에서 유해폐기물 분해에 대한 수치해석)

  • 전영남;정오진;채종성
    • Journal of Korean Society for Atmospheric Environment
    • /
    • v.16 no.6
    • /
    • pp.665-674
    • /
    • 2000
  • A major source of the hazardous waste generated is from chemical industries producing plastics, herbicides, pesticides and chlorinated solvents. All of these processes produce a class if hazardous waste termed the chlorinated hydrocarbons(CHCs), either directly or from undesirable side reactions. In this study, we investigated the destruction characteristics of hazardous waste through incineration. A nonequilibrium combustion model was used to describe the effect of the chemical kinetics due to the flame inhibition characteristics of $CCl_4$ which was used as the surrogate of hazardous waste. A parametric screening studies was made in a dump incinerator proposed in this study. The dump incinerator showed high $CCl_4$ DRE(Destruction and Removal Efficiency) as 5 nines. $CCl_4$/CH$_4$ ratio appeared to be most important in the destruction of $CCl_4$ through incineration.

  • PDF

Vaporization and condensation of metallic species in hazardous waste incineration (폐기물 소각시 생성되는 유해 중금속물질의 증발.응축현상에 대한 연구)

  • Song, Yu-Seok;Hwang, Jeong-Ho
    • Transactions of the Korean Society of Mechanical Engineers B
    • /
    • v.20 no.6
    • /
    • pp.1983-1993
    • /
    • 1996
  • For selected (pure and compound) metallic species effects of saturation ratio, temperature, particle size and number density on condensation mechanisms are first reviewed. The tendencies for vaporization and condensation differ between metallic species because of the significant differences in their saturation pressures. Then particle pressure of a metal vapor species at incineration temperature is calculated by simplifying waste as a compound of methane, chlorine and small amounts of metals and assuming a thermodynamic equilibrium state. Next the condition is assessed for which supersaturation of combustion gases by the species above the critical level for homogeneous condensation may occur, when the gases contain a large number of pre-existing particles such as entrained ashes. Regardless of the presence of chlorine in the waste, the homogeneous condensation of PbO vapors may occur, depending on number density of the pre-existing particles. However, when chlorine exists in the waste, the homogeneous condensation of PbCl$_2$vapors does not occur, which is similar to the case of Cd and Hg vapors. Thus these highly volatile species, PbCl$_2$, Cd, and Hg, may emit to atmosphere as vapor phase. In general, for reducing the emission of hazardous metallic species into the atmosphere, the number density of pre-existing particles has to be increased. For fixed particle number density, the temperature drop rate must be kept in low if the temperature at which a condensable vapor species emits from a incineration system is fixed, while the temperature drop rate must be kept in high if the residence time for which a condensable species stays in the system is fixed.

A Pilot Study on Emissions of Air Pollutants Produced from Incineration of Some Municipal Solid Wastes

  • Kim, Haen-Gah;Lee, Byeong-Kyu;Cho, Jung-Bum
    • Journal of Korean Society for Atmospheric Environment
    • /
    • v.22 no.E2
    • /
    • pp.49-56
    • /
    • 2006
  • This pilot study focuses on emissions characterization of air pollutants produced from incineration of some municipal solid wastes (MSWs). The MSWs incinerated by an electric furnace maintained up to $600^{\circ}C$ included food, paper, and plastic wastes. The pollutants analyzed in this study included concentrations of volatile organic compounds (VOCs), bottom ash contents, and heavy metals extracted from the bottom ash of each waste. The VOCs identified were classified based on their chemical structure. The total emissions of VOCs produced from incineration of the papers were identified as the highest followed by those from the plastics and the food wastes. Aliphatic alkenes were major VOC compounds produced from incineration of plastic or food wastes, while furans were major VOCs produced from incineration of papers. The second major VOCs produced from incineration of food, plastics, and papers were aromatics. In particular, hazardous air pollutants such as benzene were produced with considerable amount of emission concentration. The bottom ash contents of papers were usually much higher than those of food or plastic wastes. The bottom ash contents produced from incineration of food and plastics were much lower than those of other MSWs. In analysis of heavy metals extracted by an ultrasonic method from the bottom ashes of the papers, high concentrations of heavy metals were identified from incineration of newspapers and box (cardboard). In addition, it was identified that the general public might be exposed to considerable amounts of lead concentrations during incineration processes and uses of paper cup and from ashes.

A Study on Unused Energy Management of Jeju City Waste Environment Center (제주시 폐기물환경사업소의 미활용에너지 활용방안 연구)

  • Kim, S.H.;Kwon, K.R.;Park, Y.C.
    • Journal of the Korea Society For Power System Engineering
    • /
    • v.8 no.1
    • /
    • pp.48-54
    • /
    • 2004
  • In this study, waste heat of Jeju City Waste Environment Center is investigated and the utilization method is suggested with economical analysis of additional investment that needed for new facility. Energy balance of the typical facilities is considered in this study such as incineration plant and LFG power plant. The payback period of the investment which is used for the LFG power plant waste heat utilization facility is about 2.4 years and the economic profit of the facility during 10 years operation is up to 926 million won.

  • PDF

Simulation of the flue gas treatment processes of an industrial-waste incinerator using Aspen plus (Aspen plus를 이용한 산업폐기물 소각로의 배가스 처리 공정 모사)

  • Lee, Ju-Ho;Jung, Moon-Hun;Kwon, Young-Hyun;Lee, Gang-Woo;Shon, Byung-Hyun
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.10 no.11
    • /
    • pp.3246-3252
    • /
    • 2009
  • The interest on the recovery of thermal energy using the waste has been rising to solve the problems of continuous increase of waste generation and the depletion of the fossil fuel recently. The incineration has been used most popularly as a treatment process of the waste for the energy recovery. However, it is expected that incineration and design cost will increase in the treatment of air contaminant emitted from incinerator. This research has simulated the actual incinerator and the flue gas treatment system using the Aspen plus which is the software to simulate the chemical process. The incineration process is composed of the 1st and 2nd combustor to burn the waste, SNCR process to reduce the $NO_x$ using the urea, and the steam generation process to save the energy during incineration. The $Ca(OH)_2$ slurry was used as an acid gas (HCl, $SO_2$) treatment materials and the removal efficiency for the products from the neutralization of acid gas in SDA and combustion ash was simulated at the bag filter. The simulation result has been corresponded with the treatment efficiency of emitted gas from the actual industrial waste incinerator and it is presumed to be used to forecast the efficiencies of flue gas treatment system in the future.

Properties of High Volume Blast Furnace Slag Concrete using Recycled Aggregate with Incineration Waste Ash (소각장애시의 치환에 따른 고로슬래그 미분말 다량치환 순환골재 콘크리트의 특성)

  • Han, Cheon-Goo;Lee, Hyang-Jae;Kim, Jun-Ho
    • Journal of the Korean Recycled Construction Resources Institute
    • /
    • v.1 no.2
    • /
    • pp.107-113
    • /
    • 2013
  • This study is the study desiring to solve the problem by utilizing the kinds of recycled resources considered to be troubled complementarily. Namely the reaction of potential hydraulicity of Blast Furnace Slag Powder (BS) shall be reacted with the alkali of Recycled Fine Aggregates Coarse Aggregate, it has been experimented to obtain the optimum value with the replacement ratio of incineration plant ash (WA) treated with the slaked lime as the experiment variable by solving the alkali of shortage with the Ordinary Portland Cement (OPC). As a result, the liquidity and the air volume are declined slightly as the replacement ratio of incineration plant ash WA increases, the mixture of incineration plant ash WA 1% has been analyzed to be the most suitable considering the viewpoint of effective handling of waste as the compression and the tensile strength showed the maximum value before and after 1% even though it was disadvantageous with the increase of chloride content.