• Title/Summary/Keyword: Waste treatment

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Citizen's Attitude to Treatment Facilities of Municipal Solid Waste in Small City (폐기물 처리시설에 관한 소도시 시민의 의식 조사)

  • 장성호;박진식
    • Journal of environmental and Sanitary engineering
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    • v.14 no.1
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    • pp.70-79
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    • 1999
  • A questionary survey was conducted to investigate citizen's attitude to treatment facilities of municipal solid waste in Miryang during 8. June of 1998 and 22 June of 1988. Collection effiencies was 86.7%, as 260 individuals of the 300 individuals. The survey showed that 43.0% of answers recognized seriousness of problem of the waste treatment and 33.1% of respondents concerned about recycle of organic waste. 40.8% of total answers said that they most hated landfill site among waste treatment facilities, and most citizens wanted as much distant as possible from waste treatment facilities. It was investigated that the greater part of respondents wanted the greatest compensation. About 58% of respondents was opposed to complete waste treatment facilities. 36.2$ among answers wanted establishment of waste treatment facilities in an industrial complex or an industrial area. The majority of respondents was willing to increase recycle rate and recognized seriousness of landfill site security. The majority of citizens do not trust environmental administration of Miryang City and they think that democracy and open of administration need for overcome MINBY.

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The Production of Alcohol from Municipal Waste(II) - The Effects of Physical or Chemical Treatment on the Enzymatic Hydrolysis of Waste Paper - (도시 폐기물로부터 알코올 생산 (II) - 물리적, 화학적 전처리된 폐지의 효소가수분해 조건 검토 -)

  • Lim, Bu-Kug;Yang, Jae-Kyung;Lee, Jong-Yoon
    • Journal of the Korean Wood Science and Technology
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    • v.25 no.1
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    • pp.65-70
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    • 1997
  • The effects on the enzymatic hydrolysis of waste paper treated with physical or chemical treatment were investigated. To gain the higher saccharification rate, physical or chemical treatment are necessary in enzymatic conversion process of waste paper. The major deterrents to the effective utilization of waste paper for enzymatic conversion process are phenolic compounds, cellulose crystallinity and coating materials. In the enzymatic hydrolysis of waste paper, the deterrents through enzymatic conversion process can be eliminated by the physical or chemical treatment. This study was performed to obtain the optimal condition for enzymatic conversion process of non-treated waste paper and to review effects on enzymatic conversion process of waste paper treated with physical or chemical methods. In the aspect of saccharification rate, waste paper treated with 1.5% sodium hypochlorite was the most effective and in physical treatment methods, multi-stage treatment(autohydrolysis+refining treatment) was more effective than the other physical treatment.

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VOLATILE ORGANIC COMPOUNDS MEASUREMENT IN THE BOUNDARY OF WASTE TREATMENT FACILITIES

  • Yim, Bong-Been;Kim, Sun-Tae
    • Environmental Engineering Research
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    • v.12 no.2
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    • pp.46-54
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    • 2007
  • Concentrations of the principal volatile organic compounds, such as benzene, toluene, ethylbenzene, m,p,o-xylene, styrene, and chlorobenzene were measured at the solid waste treatment plants classified into four categories; municipal waste incinerator, municipal waste landfill site, industrial waste incinerator and industrial waste landfill site. The average concentration of VOCs in industrial waste treatment facilities was 33.43 ppb and was significantly higher than that measured at municipal waste treatment facilities (4.71 ppb). The average toluene concentrations measured at incinerators (13.05 ppb) were a little higher than those measured at landfill sites (11.54 ppb). The contribution of the waste treatment facilities to the concentration of benzene (0.35 ppb) and o-xylene (0.15 ppb) in the industrial area was relatively small. However, toluene measured in the industrial waste treatment facilities was the most abundant VOCs with the average concentration of 21.37 ppb. As a result of analyses of fingerprint, in cases of IISH and ILUS, a variety of compounds other than major VOCs were detected in high level. On the Pearson correlation analysis, the correlation was generally positive and some pairs of these VOCs were very strongly correlated (correlation coefficient > 0.75).

Electrochemical oxidation of sodium dodecylbenzenesulfonate in Pt anodes with Y2O3 particles

  • Jung-Hoon Choi;Byeonggwan Lee;Ki-Rak Lee;Hyun Woo Kang;Hyeon Jin Eom;Seong-Sik Shin;Ga-Yeong Kim;Geun-Il Park;Hwan-Seo Park
    • Nuclear Engineering and Technology
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    • v.54 no.12
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    • pp.4441-4448
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    • 2022
  • The electrochemical oxidation process has been widely studied in the field of wastewater treatment for the decomposition of organic materials through oxidation using ·OH generated on the anode. Pt anode electrodes with high durability and long-term operability have a low oxygen evolution potential, making them unsuitable for electrochemical oxidation processes. Therefore, to apply Pt electrodes that are suitable for long-term operation and large-scale processes, it is necessary to develop a new method for improving the decomposition rate of organic materials. This study introduces a method to improve the decomposition rate of organic materials when using a Pt anode electrode in the electrochemical oxidation process for the treatment of organic decontamination liquid waste. Electrochemical decomposition tests were performed using sodium dodecylbenzenesulfonate (SDBS) as a representative organic material and a Pt mesh as the anode electrode. Y2O3 particles were introduced into the electrolytic cell to improve the decomposition rate. The decomposition rate significantly improved from 21% to 99%, and the current efficiency also improved. These results can be applied to the electrochemical oxidation process without additional system modification to enhance the decomposition rate and current efficiency.

Improvement of Construction Waste Treatment when Dismantling Building (건축물 해체 시 발생하는 건설폐기물 처리의 문제점 및 개선방향)

  • Chae, Kyeong-Seok;Park, Jin-Gu;Lee, Chan-Sik
    • Proceedings of the Korean Institute Of Construction Engineering and Management
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    • 2008.11a
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    • pp.536-539
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    • 2008
  • Construction waste is given a great deal of weight on the total waste. Because of many reconstructions, urban redevelopment projects and dismantlement of dilapidated building, construction waste that generated by dismantlement is having a great effect on total construction waste. Problems about waste treatment are increasing along with an amount of construction waste. Therefore, environmental problems that related to waste treatment become a social issue recently and problems about waste treatment are confronted with a major subject. A study focuses on giving solutions to treat construction waste through quantitative analysis of the problems about waste treatment.

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The Gasification & Melting Treatment Technology of Waste (폐기물 열분해 가스화용융 기술)

  • Huh, Il-Sang
    • 유체기계공업학회:학술대회논문집
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    • 2005.12a
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    • pp.133-138
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    • 2005
  • The worldwide trend of waste treatment technology is rapidly transferring from "incineration system" to "gasification & melting system" which can derive the resources from waste and charge no more environmental burden to nature. And therefore it is necessary to adopt gasification & melting system to prevent the land pollution and to solve the problem of landfill area. Among several thermal waste treatment processes gasification and melting system is the representative process which can transfer waste to resources such as syn-gas, molten slag, metal hydroxide, mixed salt and sulfur through the process of compaction, pyrolysis, gasification and melting.

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A Study on Improvement through a Survey on the Condition of Construction Waste Treatment of Public Institutions (공공발주기관의 건설폐기물처리 실태조사를 통한 개선에 관한 연구)

  • Park, Jeong-Gwon;Lee, Myeong-Eun;Kim, Chang-Hak
    • Land and Housing Review
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    • v.13 no.2
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    • pp.141-150
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    • 2022
  • The government introduced a waste disposal share system to reduce the annual increase in construction waste and to increase the recycling rate. As a result, the cost of waste treatment by public institutions is growing inevitably, causing disagreements and disputes between the public owner and the construction waste treatment company. They are also arguing for an increase in construction waste disposal costs. Therefore, in this study, an on-site survey was conducted to identify the current construction waste management problems and to find improvements. The survey was conducted for supervisors of public institutions, construction companies, and those related to waste treatment companies. The survey results were analyzed by dividing the construction waste management, regulations, treatment cost, and treatment method. The results of this study were used as primary data for changes in the construction waste guidelines and waste treatment costs of public institutions.

A Study on NCS Development for the Treatment of Waste Oils from Ship (선박폐유처리 NCS 개발에 대한 연구)

  • KANG, Beodeul;PARK, Jong-Un
    • Journal of Fisheries and Marine Sciences Education
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    • v.28 no.6
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    • pp.1772-1780
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    • 2016
  • NCS development for the treatment of waste oils from ship was carried out through steps such as analysis on characteristics, development of competency standard, utilizing package, and validation of industry sites. The results were as follows. Firstly, duty competency was classified as levels from 2 to 6. Educational training institutions were followed by 75 graduate schools, 73 universities, 54 colleges, and 37 high schools. Secondly, developed standards were consisted of duty and competency unit. The name of duty was the treatment of waste oils from ship and competency units were consisted of 8 items as classification of waste oils from ship, pickup and transport of waste oils from ship, warehousing of waste oils from ship to marine disposal company, transport of waste oils from ship to land, warehousing of waste oils from to disposal company, determination of disposal method and plant recycling treatment, and incineration treatment. 28 competency unit elements below 8 competency units were developed. Thirdly, utilizing package was developed into 3 areas of life-long career path, training criteria, and guidelines for exam according to national competency standards in order to develop development of labor's career and perform personal management such as hiring and promotion in industry sites.

Characteristics of the Food Waste and Wastewater Discharged from Food Waste Treatment Process (음식물류폐기물 및 배출폐수의 특성)

  • Kim, Young-Kwon;Kim, Se-Mi;Kim, Min-Kyu;Choi, Jin-Taek;Nam, Se-Yong
    • Journal of Environmental Health Sciences
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    • v.35 no.6
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    • pp.526-531
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    • 2009
  • Waste generation was generally expected to steadily rise due to a rapid increase in population and economic growth. However, regulations on disposable goods and a volume-based waste fee system have led to a gradual reduction in the amount of waste. In the case of food waste, separation of food waste from other waste has been put in place since direct landfilling was banned in January 2005. The predicted generation amounts of food waste and wastewater in the model city were 54 ton/d and 127.3 ton/d by year 2020, respectively. However, appropriate treatment technologies for food waste and wastewater discharged from food waste treatment processes are yet to be established. In this study, the food waste and wastewater discharged from food waste treatment process in the model city were characterized by literal and field investigation.

Development of integrated waste management options for irradiated graphite

  • Wareing, Alan;Abrahamsen-Mills, Liam;Fowler, Linda;Grave, Michael;Jarvis, Richard;Metcalfe, Martin;Norris, Simon;Banford, Anthony William
    • Nuclear Engineering and Technology
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    • v.49 no.5
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    • pp.1010-1018
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    • 2017
  • The European Treatment and Disposal of Irradiated Graphite and other Carbonaceous Waste project sought to develop best practices in the retrieval, treatment, and disposal of irradiated graphite including other irradiated carbonaceous waste such as structural material made of graphite, nongraphitized carbon bricks, and fuel coatings. Emphasis was given on legacy irradiated graphite, as this represents a significant inventory in respective national waste management programs. This paper provides an overview of the characteristics of graphite irradiated during its use, primarily as a moderator material, within nuclear reactors. It describes the potential techniques applicable to the retrieval, treatment, recycling/reuse, and disposal of these graphite wastes. Considering the lifecycle of nuclear graphite, from manufacture to final disposal, a number of waste management options have been developed. These options consider the techniques and technologies required to address each stage of the lifecycle, such as segregation, treatment, recycle, and ultimate disposal in a radioactive waste repository, providing a toolbox to aid operators and regulators to determine the most appropriate management strategy. It is noted that national waste management programs currently have, or are in the process of developing, respective approaches to irradiated graphite management. The output of the Treatment and Disposal of Irradiated Graphite and other Carbonaceous Waste project is intended to aid these considerations, rather than dictate them.