• Title, Summary, Keyword: MSWI fly ash

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Characteristics of Specimens Made from Primary Clay and Red Hwangto with MSWI Fly Ash by Sintering Process (Sintering process에 의한 MSWI fly ash를 혼합한 일차점토(一次粘土)와 적황토(赤黃土) 공시체(公試體)의 특성(特性))

  • Yoo, Seung-Chol;Kwon, Moon-Sun;Park, Sang-Min
    • Journal of the Korean Institute of Resources Recycling
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    • v.19 no.2
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    • pp.10-18
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    • 2010
  • This research investigates the feasibility of ceramic specimens made from Primary clay and Red Hwangto with MSWI fly ash. Specimens preduced by mix-design maximum 20 wt% MSWI fly ash were analysed by SEM, UTM, ICP, etc. As a result of measurement,$P_{10}$ specimen was improved on bending strength and $R_5$ specimen was improved on compressive and bending strength. Also amount of extracted heavy metal was suitable for regulatory limits. This indicates that MSWI fly ash is indeed suitable for the partial replacement of ceramic materials in bricks.

CHARACTERISTICS AND STRENGTH EVALUATION OF THE MIXED MATERIAL OF FLY ASH FROM MUNICIPAL SOLID WASTE INCINERATOR AND THE RECYCLED POLYPROPYLENE

  • Park, Sang-Min;Kim, Hwan-Gi
    • Environmental Engineering Research
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    • v.11 no.5
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    • pp.257-265
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    • 2006
  • The purpose of research is to mix the fly ash from municipal solid waste incinerator in the recycled Polypropylene and to recycle. The specimen was produced by mixing 20 wt.% of MSWI fly ash at maximum in the recycled Polypropylene and the particle size analyzer, DSC, TGA, SEM and UTM instruments were used to analyze the physical chemical properties of the specimen. As a result of measurement, the average particle size of MSWI fly ash was $18.08\;{\mu}m$. In TGA analysis, the temperature of specimen S-5 at 50% of weight decrease was risen by $7^{\circ}C$ higher than specimen S-1. In UTM measurement, specimen S-2 showed the maximum strength for tensile strength and specimen S-3 showed the maximum strength for flexural strength. But, impact strength was decreased according to the increasing proportion of MSWI fly ash. In conclusion, when the proper amount of MSWI fly ash was added to the recycled Polypropylene, thermal endurance, tensile strength and flexural strength could be increased, but impact strength was decreased.

The Content of Chlorobenzenes and Chlorophenols and Their Isomer in MSWI Fly Ash (소각잔사 중의 클로로벤젠과 클로로페놀의 함량 및 이성체 분포특성)

  • Lee, U-Geun;Sim, Yeong-Suk;Kim, Jin-Beom
    • Journal of Korean Society for Atmospheric Environment
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    • v.14 no.3
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    • pp.209-218
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    • 1998
  • Chlorobenzenes (CBs) and chlorophenols (CPs) in fly ashy discharged from several municipal solid waste incinerators (MSWI) were investigated in terms of total content and isomer distribution. The content of CBs and CPs was highest in the fly ash from S incinerator, which were 1040.7ng CB/g-fly ash and 1156.4 ng CP/g-fly ash. According to the experimental results, while all samples contained a large amount of the higher chlorinated CBs, was almost constant regardless of season. The quantities of CBs and CPs depended closely on the chemical composition of MSW. while the isomer distribution of CBs and CPs was constant throughout all the year round.

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Study on $CaCO_3$ Preparation from MSWI Fly Ash (생활쓰레기 소각(燒却)비산재로부터 $CaCO_3$ 제조(製造)에 관한 연구(硏究))

  • Choi, Woo-Zin;Park, Eun-Kyu
    • Journal of the Korean Institute of Resources Recycling
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    • v.15 no.5
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    • pp.47-51
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    • 2006
  • The total amount of ash generated from the municipal solid waste incineration(MSWI) in Korea was approximately 420,000 tons in 2005 including 68,000 tons of fly ash. Fly ash from MSWI generally contains high amount of CaO (upto ${\sim}50%$) due to the treatment of flue gas by spraying CaO-base materials. Currently, most of fly ash generated is finally ended up with specially designed landfill sites and only less then 20% of fly ash is recycled. In the present work, preparation of $CaCO_3$ from the MSWI ny ash was studied to promote the fly ash recycling. Fly ash obtained from the dust collector in stoker-type MSWI is used to selectively dissolve CaO by using the sugar solution. Then, $CO_2$ gas was passed through the dissolved solution to pro- duce $CaCO_3$ powder. The optimum conditions for CaO dissolution were solid content 10%, reaction time 15 minutes, sugar concentration $10{\sim}15%\;and\;pH\;10.5{\sim}11.0$. The high grade $CaCO_3$ powder was obtained and the experimental conditions are also discussed.

The Change of Adsorption Characteristics for VOCs by HNO3 Activation of Adsorbent Prepared from MSWI Fly Ash (질산을 이용한 Fly Ash 흡착제의 표면 활성화에 따른 VOCs 흡착 특성의 변화)

  • Shim Choon-Hee;Lee Woo-Keun
    • Journal of Korean Society for Atmospheric Environment
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    • v.21 no.4
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    • pp.471-478
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    • 2005
  • The objective of this research is to improve adsorption efficiency of adsorbent made from MSWI (Municipal Solid Waste Incinerator) ny ash by $HNO_3$ activation. The acidity and the basicity were determined by Boehm's method and the surface structure was studied by BET method with N2 adsorption. The adsorption properties were investigated with benzene and MEK (Methylethylketone). $HNO_3$ activation can modify the surface property of an adsorbent such as specific surface area, pore volume, and functional group. According to the results, the specific surface area of the adsorbent was increased from $309.2m^2/g\;to\;553.2 m^2/g$ by activation. Also oxygen-containing functional groups were formed on it.

Removal of Benzene and Toluene by Photo-catalyst Adsorbent Prepared from MSWI Fly Ash (소각비산재로 제조한 광촉매 흡착제의 벤젠과 톨루엔 제거특성)

  • Choi So-Young;Shim Young-Sook;Lee Woo-Keun
    • Journal of Korean Society for Atmospheric Environment
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    • v.21 no.4
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    • pp.431-438
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    • 2005
  • In order to apply the photocatalytic decomposition of aromatic VOCs, adsorbent prepared from MSWI fly ash was coated by $TiO_2$ solution to endow with photo-catalytic function. The effects of coating number, existence of light source and the type of $TiO_2$ solution used for coating were examined. Adsorbent coated with amorphous $TiO_2$ solution showed higher adsorptivity than adsorbent coated with crystal $TiO_2$ solution. Without light source, breakthrough curve of photo -catalyst absorbent for VOCs removal was similar to that of absorbent made from MSWI fly ash. On the other hand, breakthrough time was enlarged with light source and total removal efficiency of benzene and toluene was also increased. It can be explained as photo-decomposition effect of $TiO_2$ photo-catalyst. Total removal efficiency of benzene and toluene was increased according to the increase of coating number with light source. It was due to the effect of adsorption and photo reaction of photo-catalytic adsorbent. But total removal efficiency of benzene was lower than that of toluene. Because benzene was removed more effectively than toluene by adsorption, but photo - decomposition effect oi toluene was more high than benzene.

Systematic investigation of heavy metals from MSWI fly ash and bottom ash samples

  • Ramakrishna., CH;Thriveni., T;Ahn, Ji Whan
    • Journal of Energy Engineering
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    • v.26 no.4
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    • pp.35-44
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    • 2017
  • Disposal of municipal solid waste has become a major problem in many countries around the world. As landfill space for the disposal of ash from Municipal Solid Waste Incineration (MSWI) becomes scarce, numerous reports and researches address the various environmental issues about the municipal solid waste incineration waste management and other particulate matters with the range of 10 ~ 2.5. Although in many developing and industrialization countries landfill with the disposal of municipal solid waste, open incineration has become a common practice. Large municipal waste incinerators are major industrial facilities and have the potential to be significant sources of environmental pollution. Despite the significant volume reduction from incineration, waste recycling is important to ensuring the future welfare of mankind. The main goal of the present work is the physical and chemical characterization of the local incineration bottom ash towards its eventual re-utilization. In this paper, we reported the studies on physical and chemical characteristics of municipal solid waste incineration (MSWI) fly ash and bottom ash containing particulate matter whose particulate sizes are lower than $PM_{10}$, $PM_{2.5}$ and heavy metal were investigated.

Characteristics of VOCs Adsorption of Brick Prepared by MSWI Fly Ash (소각재로 제조한 건축외장재의 VOCs 흡착 특성 평가)

  • Ban, Hyo-Jin;Jeong, Jae-A;Lee, Woo-Keun
    • Journal of Korean Society of Environmental Engineers
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    • v.32 no.9
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    • pp.857-861
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    • 2010
  • Recently photochemical smog has become a serious urban air pollution. And VOC is the major pollutant for it. With the advance of industrialization and urbanization, MSWI fly ash and sewage sludge and melting slag were generated. It is necessary to de-toxificate ashes, because they contain many toxic constituents and probably lead to contaminate the environment. The objective of this research was to prepare multi-functional brick which is able to remove VOCs in ambient air. The bricks were made of MSWI fly ash, sewage sludge and slag. The benzene adsorption experiment by brick was acted to evaluate its adsorptivity. And also photocatalyst material was coated to enhance its adsorptivity and the endurance on the brick. According to the result, the benzene showed 74~96%. The removal efficiency was increased and the breakpoint time was lengthened by coating a brick.

Emission Characteristics of Metal Elements from a MSW Incinerator (도시폐기물 소각시설에서의 금속배출특성 연구)

  • Kim, Ki-Heon;Kim, Sam-Cwan;Song, Geum-Ju;Seo, Yong-Chil
    • Journal of the Korean Society of Combustion
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    • v.8 no.1
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    • pp.1-8
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    • 2003
  • The behavior and characteristics of heavy metals at different streams in a MSWI(Municipal Solid Waste Incinerator) with a capacity of 100tonnes/day were investigated by measuring the concentration of heavy metals and gases and analyzing their leaching data from ashes. Metal components of Cr, Cu, Cd and Pb were in higher concentrations in the fly ashes collected after the water spray tower than in the bottom ashes. It was due to condensation by a lower temperature with water spray cooling. Metal contents in the bottom ash became higher for finer particles as expected. The mass balance of heavy metals in different stream was estimated from the analyzed data in bottom ash and collected dusts at different locations. For the lower volatility of metals such as Pb, Cu, Cr, 88-97% of them remained in the bottom ash, while Cd and Hg escaped from the combustor with remaining in bottom ash of 18.4 and 0.8%, respectively. In most cases the leaching rate of fly ash showed higher values than that of bottom ash, with the their average acidities of 9.8 and 11.9 respectively.

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Removal of Cl from the Incineration Ash of Domestic Municipal Solid Waste

  • Han, Gi-Chun;Kim, Hyung-Seok;Ahn, Ji-Whan;Kim, Hwan
    • Proceedings of the IEEK Conference
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    • pp.628-632
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    • 2001
  • The removal rate of Cl from municipal solid waste incineration(MSWI) ash(bottom ash and fly ash) by washing was investigated. The Cl contents in the bottom ash and fly ash were 2.6-3.0% and 25-30% respectively, and KCl, NaCl, CaCIOH and friedel's salt were main components. From the results on the effects of washing time and temperature, the Cl contents in the bottom ash and fly ash were decreased up to 0.3% and 2.0% respectively by using of water as a solvent within 30 min at 2$0^{\circ}C$, 300 rpm of agitation speed and 10 of liquid/solid ratio. It is expected that the removal of Cl from the incineration ash by washing could make use of the ash for a cement raw material and so on.

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