• Title, Summary, Keyword: municipal solid waste

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Quantitative Evaluation of CO2 Sequestration in Ca-rich Waste Mineral for Accelerated Carbonation (가속탄산화를 통한 Ca-rich Waste Mineral의 정량적인 CO2 고용량 평가)

  • Nam, Seong-Young;Um, Nam-Il;Ahn, Ji-Whan
    • Journal of the Korean Ceramic Society
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    • v.51 no.2
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    • pp.64-71
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    • 2014
  • Accelerated carbonation is a technique that can be used as a CCS technology for $CO_2$ sequestration of approximately 5~20% in a stable solid through the precipitation of carbonate. An alkaline inorganic waste material such as ash, slag, and cement paste are generated from incinerators, accelerated carbonation offers the advantage of lower transport and processing costs at the same generation location of waste and $CO_2$. In this study, we evaluated an amount of $CO_2$ sequestration in various types of inorganic alkaline waste processed by means of accelerated carbonation. A quantitative evaluation of $CO_2$ real sequestration based on a TG/DTA analysis, the maximum 118.88 $g/kg_{-waste}$ of $CO_2$ in paper sludge fly ash, the maximum 134.46 $g/kg_{-waste}$ of $CO_2$ in municipal solid waste incinerator bottom ash, the maximum 9.72 $g/kg_{-waste}$ of $CO_2$ in industrial solid waste incinerator fly ash, and the maximum $18.19g/kg_{-waste}$ of $CO_2$ in waste cement paste.

Physicochemical Properties of Landfill Mined Wastes from Old Landfill Site (불량 매립지에서 굴착된 폐기물의 물리화학적 특성평가)

  • 남궁완;이노섭;박준석;인병훈
    • Journal of Environmental Health Sciences
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    • v.28 no.2
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    • pp.99-108
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    • 2002
  • This study was carried out to evaluate the Physicochemical characteristics of mined waste(separated waste and soil) and to predict environmental effect of an old landfill site located at north of Seoul. Municipal solid waster(MSW) had been disposed of at the old landfill site used in this study for about 2 years(1990-1992). The old landfill site selected for this study had accepted mainly municipal solid waste. The landfill-mined waste contained separated waste (40.9%) and soil(59.1%) by wet weight basis. The separated waste consisted of combustible(91.0%) and non-combustible(9.0%). The combustible waste was mainly non-biodegradable plastics. The low heating value of the separated combustible waste, which is calculated by Dulong's equation, was as high as 3,470kcal/kg. According to the Korean Extraction Procedure, separated waste and soil were proved to be not hazardous. The total content of heavy metal in the separated waste and soil met standard of California State, USA. Therefore the separated waste may be relandfilled at a sanitary landfill site and/or burned up at an incinerator, and the separated old soil may be used ad landfill cover-soil at a sanitary landfill site. Water quality of two streams was grade IV, of which water could be used as industrial and agricultural water. The streams near the landfill site might not be contaminated by leachate from the old landfill site. It was estimated that organic matter in the old landfill site would not be actively biodegraded within a short period of time.

The distribution characteristics of persistent organic pollutants in incineration residues at solid waste incinerators (소각시설 소각재의 잔류성 유기오염 물질 분포특성)

  • Kim, Jong-Hyang;Lee, Bang-Hee;Baek, Sung-Bok;Lee, In-A;Lee, Sang-Hee;Park, Kyung-Ho;Kim, Hyun
    • Analytical Science and Technology
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    • v.22 no.2
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    • pp.119-127
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    • 2009
  • This study was carried out to investigate the distribution characteristics of persistent organic pollutants in incineration residues at industrial waste incinerators and municipal solid waste incinerators, which were analyzed by the official analytical method for the endocrine disrupting chemicals and the waste. Seven of 12 persistent organic pollutants were quantitatively analyzed by GC-MSD (SIM-mode). Hexachlorobenzene was detected in 21 samples among 44 incineration residues. The level of hexachlorobenzene was 0.132-8.138 ng/g in incineration residues, 0.195-5.765 ng/g in fly ash at industrial waste incinerators, 0.270-1.828 ng/g in bottom ash and 0.154-50.643 ng/g in fly ash at municipal solid waste incinerators, respectively.

Metal Recycling Technologies from Fly-Ashes by the Metal Mining Agency of Japan

  • Kazuyuki, Kikuta;Nobuyuki, Masuda;Nobuyuki, Okamoto;Eiichi, Arai;Junichi, Kobayashi
    • Proceedings of the IEEK Conference
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    • pp.659-663
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    • 2001
  • In Japan, the municipal solid waste, which amounts to 50 million tons, is generated every year and most of it is incinerated. The bottom and fly ashes are disposed to the registered disposal areas under the provisions of The Waste Disposal and Public Cleaning Law. Especially, as the fly ash from the municipal waste incineration (the primary fly ash) contains heavy metals (lead, zinc, etc) and dioxins, it cannot be disposed directly without decontamination, such as moiling, cementation, chelating and dissolving processes provided in the law. However, these procedures for decontamination, except melting, are not enough for dioxins. Even in case of melting, the fly ash from the process (the secondary fly ash) contains high concentration of heavy metals (e.g., Zn; 1-20%, Pb; 1-10%). For these reasons, Metal Mining Agency of Japan (MMAJ), a governmental organization, started a four-year project to develop the treatment technologies of these fly ashes in 1999. The purpose of the project is to establish the integrated technologies to recover the valuable metals from, and to decontaminate, the primary and secondary fly-ashes in the practical scale by utilizing the existing metallurgical processes and facilities, along with the energy saving and the reduction of the environmental impact.

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Change of Municipal Solid Waste Composition and Landfilled Amount by the Landfill Ban of Food Waste (음식물류폐기물 직매립 금지에 따른 도시생활폐기물의 조성 및 매립량 변화)

  • Yoon, Seok Pyo;Lim, Hak Sang
    • Journal of the Korea Organic Resources Recycling Association
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    • v.13 no.3
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    • pp.63-70
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    • 2005
  • As the landfill ban of food waste has enforced since 2005, the composition of municipal solid waste(MSW) has changed dramatically. In this 2 year study, MSW in a small city has collected 3 times at 10 different generating points, and physico-chemical analysis has done. From the result, the effect of landfill ban of food waste on the physico-chemical properties of MSW was described. Landfill ban of food waste has reduced by 12 weight % in the composition of food waste in MSW, and has reduced by 25 % of bulk density. After landfill ban of food waste, water content of MSW has reduced to 32.3%, which is reduced by 14.1 % of water content of year 2004 data. Low heating value of MSW after landfill ban was 2991.4kcal/kg, which has increased 32% than that of year 2004 data. From landfill gas generation modeling, it is estimated that the yearly generation rate of landfill gas will be reduced by 5% than in case of accepting food waste into the landfill.

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Effect of Shifts in Food Waste Policy on the Municipal Solid Waste Composition (음식물 폐기물 정책 변화가 도시생활폐기물의 조성변화에 미치는 영향)

  • Yoon, Seok-Pyo
    • Journal of the Korea Organic Resources Recycling Association
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    • v.16 no.1
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    • pp.39-45
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    • 2008
  • As a waste management tool, the prohibition of landfilling of food waste has enforced since 2005. the composition of municipal solid waste (MSW) has changed dramatically. In this study, MSW generated from a small city collected once a year in 2004, 2005 and 2007, to qualify the characteristics of MSW before and after implementation of the tool. The prohibition of landfilling of food waste dramatically reduces food waste in MSW to 5.5 weight %, and on the other hand results to increase papers to 50.6 % and plastics to 22.6 %, The bulk density lowers to 50 %, which newly propose the necessity of volume reduction and incineration of MSW to ensure efficient transport and disposal. As water content of MSW reduces to 15.9 %, lower heat value of MSW after prohibition of landfilling of food waste increase to 3565.6 kcal/kg. Mitigation of bad smell and waste leachate with lower contaminants are recommendable as a kind of positive effects benefited by the tool.

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Research Investigations at the Municipal (2×35) and Clinical (2×5 MW) Waste Incinerators in Sheffield, UK

  • Swithenbank, J.;Nasserzadeh, V.;Ewan, B.C.R.;Delay, I.;Lawrence, D.;Jones, B.
    • Clean Technology
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    • v.2 no.2
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    • pp.100-125
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    • 1996
  • After recycle of spent materials has been optimised, there remains a proportion of waste which must be dealt with in the most environmentally friendly manner available. For materials such as municipal waste, clinical waste, toxic waste and special wastes such as tyres, incineration is often the most appropriate technology. The study of incineration must take a process system approach covering the following aspects: ${\bullet}$ Collection and blending of waste, ${\bullet}$ The two stage combustion process, ${\bullet}$ Quenching, scrubbing and polishing of the flue gases, ${\bullet}$ Dispersion of the flue gases and disposal of any solid or liquid effluent. The design of furnaces for the burning of a bed of material is being hampered by lack of an accurate mathematical model of the process and some semi-empirical correlations have to be used at present. The prediction of the incinerator gas phase flow is in a more advanced stage of development using computational fluid dynamics (CFD) analysis, although further validation data is still required. Unfortunately, it is not possible to scale down many aspects of waste incineration and tests on full scale incinerators are essencial. Thanks to a close relationship between SUWIC and Sheffield Heat&Power Ltd., an extended research programme has been carried out ar the Bernard Road Incinerator plant in Sheffield. This plant consists of two Municipal(35 MW) and two Clinical (5MW) Waste Incinerators which provide district heating for a large part of city. The heat is distributed as hot water to commercial, domestic ( >5000 dwelling) and industrial buildings through 30km of 14" pipes plus a smaller pipe distribution system. To improve the economics, a 6 MW generator is now being added to the system.

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Integrating approach to size and site at a sanitary landfill in Selangor state, Malaysia

  • Younes, Mohammad Khairi;Basri, Noor Ezlin Ahmad;Nopiaha, Zulkifli Mohammad;Basri, Hassan;Abushammala, Mohammed F.M.;Maulud, Khairul Nizam Abdul
    • Environmental Engineering Research
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    • v.20 no.3
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    • pp.268-276
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    • 2015
  • Solid waste production increases due to population and consumption increments. Landfill is the ultimate destination for all kinds of municipal solid waste; and is the most convenient waste disposal method in developing countries. To minimize investment and operational costs and society's opposition towards locating landfills nearby, proper landfill sizing and siting are essential. In this study, solid waste forecasting using Autoregressive Integrating Moving Average (ARIMA) was integrated with government future plans and waste composition to estimate the required landfill area for the state of Selangor, Malaysia. Landfill siting criteria were then prioritized based on expert's preferences. To minimize ambiguity and the uncertainty of the criteria prioritizing process, the expert's preferences were treated using integrated Median Ranked Sample Set (MRSS) and Analytic Hierarchy Process (AHP) models. The results show that the required landfill area is 342 hectares and the environmental criteria are the most important; with a priority equal to 48%.

Bioconversion of flowers waste: Composting using dry leaves as bulking agent

  • Sharma, Dayanand;Yadav, Kunwar D.
    • Environmental Engineering Research
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    • v.22 no.3
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    • pp.237-244
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    • 2017
  • At present, in India, handling of solid waste has become a major challenge for the municipal authorities. Composting of solid waste, especially organic waste, can be one of the solutions to tackle the issue of handling solid waste. The present study is focused on agitated piles composting of flower waste (FW). Five combinations of FW with dry leaves (DL) and cow dung (CD) were prepared to conduct the study. Significant changes were observed due to the addition of bulking agent. The bulking material helps to reduce the production of leachate and also to maintain the aerobic condition within the piles. The reduction of total organic carbon was 21% in FW composting which increased by 36.48% during the composting of FW on addition of DL and CD. On the 120th day of composting, the pH of pile five (70 kg FW + 20 kg CD + 15 kg DL) was 7.33, electrical conductivity 2.77 mS/cm, total organic carbon 26.9%, total nitrogen 2.2%, and C:N ratio was 12. Appropriate proportion of waste mixture played an important role in providing favorable conditions for the microbial transformation of flower waste to stabilized compost. Finally, FW with the combination of CD and DL was found to be successful during pile composting.

Flyash를 이용한 일일복토재의 포설 사례 연구

  • 박상현;한완수;이재영
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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    • pp.386-389
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    • 2002
  • It may be necessary to apply a daily fever to operate the municipal solid waste landfill. The daily cover helps to control nuisance factors such as the escape of odors, dusts and airborne emissions, and can control the population of disease vectors. Also it may be reduce the infiltration of rain, decreasing the generation of leachate and the potential for surface water and groundwater contamination. Because of its usual availability and traditional usage as the municipal solid waste landfill, soil remains as the most common daily cover material. However, soil tends to reduce the volume of dumping waste c;3pacity in the landfill, it also reduces a period of using in the landfill. Therefore, it is necessary to research about Alternative Daily Cover Materials (ADCMs) because of the limitation of landfill sites. Recently, The types of ADCMs are classified into geosynthetics, forms, spray-ons, indigenous materials. In this study, the authors have tested the spray type of Alternative Daily Cover(ADC) using by flyash, alum with cement. The development. of ADCMs will be highly effective in terms of prolongation using landfill.

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