• Title, Summary, Keyword: municipal solid waste

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A study on the physico-chemical characteristics of municipal solid wastes generated in the sunchon city (순천시 생활쓰레기의 계절별 조성 및 물리·화학적 특성에 관한 연구)

  • Hu, Kwan;Ko, Oh-Suk;Wang, Seung-Ho
    • Journal of the Korea Organic Resources Recycling Association
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    • v.9 no.4
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    • pp.105-110
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    • 2001
  • To provide successful treatment policy and to apply sources for establishing plan, municipal solid wastes quantity was investigated as physical and chemical characteristics from Sunchon city. Results are like following after checking out characteristics by seasons, type. The average specific weight of municipal solid wastes is $219kg/m^3$ for combustible wastes, $391kg/m^3$ for non-combustible. Food wastes of combustible wastes contained moisture of 38.1% as standard of moisture weight per real weight, 49.6% moisture is contained in non-combustible wastes except food wastes moisture. Moisture, volatile and ash are contented by 16.9%, 68.1% and 15.0% in combustible wastes except food wastes. That means combustible wastes are available a refuse incineration. The low calorific value of only combustible waste is 2,962kca1/kg that is good for refuse incineration.

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Physico-Chemical Characteristics of Municipal Solid Wastes in the East Coast of Gangwon (강원 동해안지역의 생활폐기물 발생특성)

  • Lee Hae-Seung;Choi Yog-Bum;Kim Byoung-Ug
    • Journal of environmental and Sanitary engineering
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    • v.20 no.1
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    • pp.1-11
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    • 2005
  • This research was performed to investigate the generation and physico-chemical characteristics of municipal solid wastes in the east coast of gangwon. The results were as follows: i) The generation rate of G city and Y gun were 0.187-0.384 $\cal{kg/cap/d}$ and 0.136-0.259 $\cal{kg/cap/d}$. Apparent density of G city and Y gun were 137.9-191.9 g/L and 157.3-238.3 g/L, respectively. ii) The wastes consisted of $76.1-97.5\%$ of combustibles and $2.5-23.9\%$ of incombustibles in G city. And the wastes consisted of $73.7-98.6\%$ of combustibles and $1.4-26.3\%$ of incombustibles in Y gun. Most of municipal solid wastes are composed of food, paper, and vinyl-plastics waste. Water content of commercial area, agricultural resident, detached resident, apartment area, school zone were 42.5-45.9, 37.6-43.4, 32.4-38.4, 29.3-32.3, $6.8-26.9\%$, respectively. iii) The low heating value of G city and Y gun were 1,125.5-2,540.7 $\cal{kcal/kg}$, 1,104.4-2,062.3 $\cal{kcal/kg}$, and school and apartment area were higher than commercial area.

Emission Characteristics of PCDD/Fs in MSW Incinerator(I) - The Effect of Air Pollution Control Device - (도시폐기물 소각공장에서의 다이옥신 배출특성(I) - 방지시설의 영향 -)

  • Kim, Jin-Beom;Lee, Woo-Keun
    • Journal of Korean Society of Environmental Engineers
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    • v.22 no.10
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    • pp.1817-1824
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    • 2000
  • This study is carried out to investigate the discharge characteristics of PCDD/Fs from municipal solid waste(MSW) incinerator, According to the results measured at several air pollution control devices(APCDs), the largest amount of polychlorinated dibenzo-p-dioxins/dibenzofurans(PCDD/Fs) are found at selective catalytic reduction (SCR) inlet. Therefore, it concludes that the electrostatic precipitator(EP) provides the appropriate condition for the formation of PCDD/Fs. The concentration of PCDD/Fs shows a large difference with the season. The concentration of PCDD/Fs in winter is higher than that of autumn, which suggests that the formation of PCDD/Fs is affected by the MSW components and the operation condition of municipal solid waste incinerator(MSWI).

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Comparative Risk Assessment Methodology: An Application to Air Pollution (비교 위험도 평가 방법의 대기 오염에 대한 적용 연구)

  • Lee, Jin-Hong
    • Journal of Korean Society for Atmospheric Environment
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    • v.8 no.2
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    • pp.100-104
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    • 1992
  • The research in this paper centers on a comparative risk assessment for nearby air pollution by carcinogenic metal emission from municipal solid waste incinerators. If a substance is identified as a potential human carcinogen, the carcinogenicity may be related to the chemical form of a substance and the route of exposure. This type of information with regard to carcinogenic uncertainty is incorporated into hazard quantification. In addition to the dioxin emission, the metal emission from municipal solid waste incineration is found to be a major contributor to human cancer risk via the inhalation route. The magnitude of risk by metals is about 5 times greater than that of risk by dioxins. Hexavalent form of chromium and cadmium compounds are major contributors to cancer risk from metal emission. In addition, hexavalent chromium is known to be human carcinogen while 2,3,7,8-TCDD is known to be only probable human carcinogen.

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Study of the MSW landfill Facility of Installation and Consideration (폐기물 매립시설 설치방법 및 고려사항에 대한 고찰)

  • Kim, Sang-Keun;Kwon, Ki-Bum;Yu, Jun;Chung, Ha-Ik
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.259-266
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    • 2008
  • In the past, MSW (Municipal Solid Waste) disposal was typically done by recycling, incineration, or landfilling. In South Korea prior to the late 1950's, land burial was usually accomplished by disposal in an open dump. Currently, with increasing concerns and environmental recognition, MSW disposal and landfilling is more restricted. MSW landfill facilities have been developed with certain design and construction specifications. However, these methods have a space for improvement. MSW landfill facilities follow a step wise approach of design, construction, operation and closure management after use in agreement with established environmental and sanitary standards. This study intends to give a technical guidance for installation and consideration of newly established MSW landfill facilities, and also provide an establishment and regular inspection of MSW landfill facilities.

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A Study on Improvement Measures of Energy Recovery Efficiency through Analysis of Operational Status of Municipal Solid Waste Incineration Facilities (생활폐기물 소각시설의 운영 실태 분석을 통한 에너지회수 효율 개선방안 검토)

  • Park, Sang-Jin;Phae, Chae-gun
    • Journal of Korea Society of Waste Management
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    • v.35 no.8
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    • pp.762-769
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    • 2018
  • This study was carried out to examine the improvement plan by analyzing the characteristics of imported wastes, operation rate, and benefits of energy recovery for incineration facilities with a treatment capacity greater than 50 ton/day. The incineration facility capacity increased by 3,280 tons over 15 years, and the actual incineration rate increased to 2,783 ton/day. The operation rate dropped to 76% in 2010 and then rose again to 81% in 2016. The actual calorific value compared to the design calorific value increased by 33.8% from 94.6% in 2002 to 128.4% in 2016. The recovery efficiency decreased by 29% over 16 years from 110.7% to 81.7% in 2002. Recovery and sales of thermal energy from the incinerator (capacity 200 ton/day) dominated the operation cost, and operating income was generated by energy sales (such as power generation and steam). The treatment capacity increased by 11% to 18% after the recalculation of the incineration capacity and has remained consistently above 90% in most facilities to date. In order to solve the problem of high calorific value waste, wastewater, leachate, and clean water should be mixed and incinerated, and heat recovery should be performed through a water-cooled grate and water cooling wall installation. Twenty-five of the 38 incineration facilities (about 70%) are due for a major repair. After the main repair of the facility, the operation rate is expected to increase and the operating cost is expected to decline due to energy recovery. Inspection and repair should be carried out in a timely manner to increase incineration and heat energy recovery efficiencies.