• Title, Summary, Keyword: municipal solid waste

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A Study on Characteristics of Water Quality in Wastewater according to the Washing of Municipal Solid Waste Incinerator (MSWI) Ash

  • Byun, Mi-Young;Kim, Hyung-Seok;Ahn, Ji-Whan;Kim, Hwan
    • Proceedings of the IEEK Conference
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    • pp.296-300
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    • 2001
  • In order to recycle the incineration ash (bottom ash and fly ash) generated from the incineration of municipal waste for a cement material, salts as well as heavy metal should be removed by the stabilization treatment. Most of these heavy metal and over 80% of salts are removed by a washing as a pre-treatment. However, wastewater which is another pollutant is generated by a washing, then proper treatment should be developed. First the characteristics of incineration ashes collected from two domestic full-sized incinerators were investigated and removal rate of salts and heavy metals from them also studied. The wastewater quality was compared to the criteria of the regulation by analyzing the characteristics of generated wastewater during the washing of incineration ash as a condition of liquid/solid ratio. Also, we tried to used this experimental results for the basic data to develop proper processing technique of municipal waste.

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Manufacture of the Non-Sintered Aggregate Using the Industrial By-products and the Municipal Waste Incineration Fly-Ash (도시 쓰레기 소각 비산재와 산업부산물을 이용한 비소성 인공골재의 제조)

  • 김대규;윤성진;문경주;소양섭
    • Proceedings of the Korea Concrete Institute Conference
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    • pp.69-74
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    • 2002
  • Incineration method of municipal solid waste is the general method for reduction it's quantity and weight. Municipal solid waste incineration ash is classified two general types of ash : fly ash((MWFA) and bottom ash(MWBA)). MWFA containing a high degree heavy-metal may give rise to a serious environmental trouble. Therefore, this study was carried out to examine utilization of fly ash. In this study, we tried to find the recycling method of fly ash as a environmental-friendly artificial aggregate. The artificial aggregate using fly ash was tested for the various aspects, including physical properties and environmental stability. The qualities of artificial aggregate are similar to it of lightweight aggregate, and the heavy metal leaching concentration are very lower than a limitation of KSLT and EP.

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Mechanical Properties of Municipal Solid Wastes (비위생 매립토의 역학적 물성)

  • Mok, Young-Jin;Kim, Dae-Il;Cho, Eun-Hyuk
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.1377-1383
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    • 2005
  • Mechanical properties of Municipal Solid Wastes(MSW) and their influencing parameters were studied by using a series of triaxial compression tests and resonant column tests. The shear strength of MSW can be modeled by a bilinear failure criterion. As the unit weight increasing, cohesion and internal friction were increased linearly on semi-log scale. As the proportion of waste to soil increases, maximum shear moduli tend to decrease whereas minimum damping ratios increase. Shear moduli and damping of degradable waste are higher than those of non-degradable MSW.

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Comments on waste to energy technologies in the United Arab Emirates (UAE)

  • Shareefdeen, Zarook;Youssef, Norhan;Taha, Ahmed;Masoud, Catherine
    • Environmental Engineering Research
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    • v.25 no.1
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    • pp.129-134
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    • 2020
  • The main reason that drives many developing countries to pursue waste-to-energy (WtE) technologies is that it produces energy while eliminating build-up of large quantities of wastes, at a time, when oil and gas reserves are declining. The rate of generation of municipal solid wastes (MSW) in any given country depends on many factors including economy, population, and modernization of industry and infrastructure developments. The United Arab Emirates (UAE) is a federation of seven emirates that has grown to be one of the Middle East's most important economic centers. UAE has also become one of the highest waste producing countries due to fast development and growth; thus, UAE pursue modern technologies to covert generated wastes into energy. In this communication, the status of on-going waste to energy projects and WtE plants that are currently under design and construction in UAE are discussed. The need for development of WtE technologies is presented based on the literature, reports, economics and the environmental regulations.

A Study about Recycling from Municipal Solid Waste Incineration Bottom Ash (생활폐기물(生活廢棄物) 소각(燒却)바닥재의 재활용(再活用)을 위한 연구(硏究))

  • Ahn, Ji-Whan;Oh, Myung-Hwan;Han, Choon
    • Journal of the Korean Institute of Resources Recycling
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    • v.17 no.1
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    • pp.3-11
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    • 2008
  • The treatment of domestic municipal solid waste has inclined to incineration process instead of disposal in landfills. So, the amount of ash generated by incineration of municipal solid waste is gradually increased. The incineration ash divides into bottom ash and fly ash. The bottom ash which accounts for about 90% of the incineration ash consists of ceramics, glasses and metals. And it can be used as the recycling product by the stabilization process. For example, the bottom ash is used as secondary building material or for other similar purposes such as road sub-bases and noise barrier in USA, Europe and Japan. But, the stabilization-treatment technique of bottom ash sti11leaves much to be desired in Korea. Thus, the domestic study of recycling about bottom ash must be improved through investigation about the chemical property and technique of stabilization.

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.

Consciousness of Citizens for the Issue of the MSW(Municipal Solid Waste) (생활쓰레기 문제에 대한 소도시 시민의 의식조사)

  • 장성호
    • Journal of environmental and Sanitary engineering
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    • v.13 no.3
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    • pp.93-101
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    • 1998
  • This study was carried out to investigate and analyze the citizen's attitude for the issue of the municipal solid wastes in Miryang city. The waste generation rate was decreased by 56% compared with 1991, and 71.8% of generated wastes were treated by landfill method. 61.6% among respondents were contacted waste problem by TV and the majority of respondents felt seriousness of food-waste problem. The majority of people felt that waste discharge decreased after "volume-base charge system" and 71% of total respondents were burdened down with use of volume-base charge envelope. The greater part of citizens answered that they experienced damage due to wastes and satisfied with the collection system but they recognized the necessity of the establishment of collection system and increase of cleaners must be nessary.

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Biodrying of municipal solid waste under different ventilation periods

  • Ab Jalil, N.A.;Basri, H.;Basri, N.E. Ahmad;Abushammala, Mohammed F.M.
    • Environmental Engineering Research
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    • v.21 no.2
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    • pp.145-151
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    • 2016
  • Biodrying is a pre-treatment method that applies biological and mechanical concepts to drying solid waste. In Malaysia, municipal solid waste (MSW) is unseparated and contains a high level of moisture, making the use of technology such as solid waste burning unsuitable and harmful. MSW containing organic material can be processed naturally until the moisture content of the waste is reduced. This study on MSW biodrying was carried out on a laboratory scale to measure the percent moisture content reduction and to monitor temperature patterns under different ventilation periods. This work was conducted using five biodrying reactors volumes of 50 liters each. Reactors were ventilated for 5, 10, 15, 20 and 30 min every 3 h, with a 3 bar air supply. The duration of this process was 14 days for all samples. The results showed that the optimum ventilation time was 10 min, with an 81.84% reduction in moisture content, and that it required almost half of the electricity cost required for the 20 and 30 min ventilations.

The Study of Physico-chemcal Characteristics of Municipal Solid Waste (MSW) in Gangwon Area (강원지역 도시폐기물의 물리·화학적 특성 연구)

  • Lee, Keon-Joo
    • Journal of the Korea Organic Resources Recycling Association
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    • v.17 no.2
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    • pp.101-111
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    • 2009
  • In this study, the physico-chemical characteristics of municipal solid waste (MWS) which was treated in gangwon area were investigated. It is necessary to measure the characteristics of municipal solid waste for build a waste treatment and RDF facility and for data-base and total managing of the landfill. It was found that the average density of solid wastes is in the range of $101.8{\sim}199.8kg/m^3$. This MSW was composed of 30.7% of food wastes, 36.3% of papers, 15.8% of plastics & vinyls, 1.9% of textiles, 3.2% of wood and 1.5% of rubber & leathers respectively. Most of MSW are composed of food, paper and plastic waste and the combustible waste is more than 90%. For three components, moisture is 44.6%, combustible component is 47.7% and ash is 7.7% respectively. The chemical elements are carbon, oxygen, and hydrogen on the dry basis of wastes. The low heating value of the MSW measured by calorimeter was obtained as 2,631 kcal/kg, and the high heating value of the MSW was obtained as 3,310 kcal/kg.

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The Effect of Organic Loading and Seeding Rate to Biodegradibility of Food Waste (음식물쓰레기의 유기물 부하 및 식종율 변화가 생분해도에 미치는 영향)

  • 박남배;정용현;양병수
    • Journal of environmental and Sanitary engineering
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    • v.14 no.2
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    • pp.25-31
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    • 1999
  • Energy recovery technology from municipal solid waste has been increasingly established in many countries. Anaerobic treatment of municipal sewage sludge has low digestion efficiency because of low organic loading rate of sewage sludge. The purpose of this study was to evaluate anaerobic biodegradability of food waste which was based on organic loading rate and seeding rate. From the results of anaerbic biodegration, the optimum condition for seeding rate was turn out over 40%, which did not inhibition of methane production.

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