• 산업기술연구
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• 제17권
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• pp.161-168
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• 1997

This investigation was carried out to study generation of solid waste and collection system in the College of Engineering and College of Social Science, library, dormitory and student center of Kangwon National University. It is to supply basic data for solid waste management. Each result of investigation considers effect getting generation property, unit waste generation rate and reusing.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2002년도 봄 학술발표회 논문집
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• pp.605-610
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• 2002

Waste body settlement is an important aspect of management of landfill sites both during the operational and the post-closure phases. Settlement in landfill waste is caused by combination of load, creep and biodegradation induced effects. In this paper, settlement characteristics of closed waste landfill were studied by analyzing in situ measured data and computer simulation technique. Techniques for the analysis of load-induced and creep settlement, and for their implementation, can be adapted for landfill waste. The estimate of settlements from models shows a increase according to time.

• 설비공학논문집
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• 제24권5호
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• pp.428-432
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• 2012

In the waste collection system, living waste is collected through the piping network. There are many confluent pipes in a piping network. These confluent pipes were often clogged up with waste. The optimal configuration of the confluent pipes has been defined by the design guide. However, nobody know how this design guide were determined. Therefore, in this paper, we found the design data for the confluent pipe configuration in order to avoid the waste clogging in a piping network. The distance between connected point on the confluent pipes should be longer than the previous design guide.

• 공업화학
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• 제30권6호
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• pp.707-711
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• 2019

The feasibility of waste concrete as a catalyst for the effective pyrolysis of polyethylene terephthalate (PET) was examined using thermogravimetric (TG) and pyrolyzer-gas chromatography/mass spectrometry (Py-GC/MS) analyses. TG analysis results indicated that the maximum decomposition temperature of PET is not altered by the use of waste concrete, showing similar values (407 ℃ and 408 ℃ at 5 ℃/min). Meanwhile, the volatile product distribution data obtained from the Py-GC/MS analysis revealed that the use of waste concrete promoted the deoxygenation reaction via converting the oxygen containing products such as benzoic acids, benzoates, and terephthalates to valuable deoxygenated aromatic hydrocarbons including benzene, toluene, ethylbenzene, and styrene. This suggests that the waste concrete can be used as a potential catalyst for the production of valuable aromatic hydrocarbons from PET pyrolysis.

• 대한가정학회지
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• 제36권12호
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• pp.191-200
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• 1998

The purpose of this study were to examine the disposal consciousness of foods waste and meal management behavior related to environmental conservation, and to find out the ways to improve the disposal of foods waste. Data were collected from questionaire with 786 housewives who live in Chonbuk area. About 45% of foods waste consisted of vegetables and fruits. The levels of cooking(use) and idsposal behavior among meal management behavior were relatively high, but food preparation(buy) score was low. These results suggested that menu planning before food preparation, and buying some cleaned and trimmed foods in the market should be recommennded to reduce the foods waste. The levels of meal management behavior did not show any significant associaations with disposal consciousness of foods waste but were positively correlated to environmental conciousness. It could be thought that the effort of government administration to reduce and reuse of foods waste is needed to improve the desirable disposal behavior of that, and the well programmed enviornmental education should be more required and practical than increase the environmental conciousness.

• 한국해양공학회지
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• 제15권2호
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• pp.130-134
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• 2001

Recently environmental pollution at sea becomes serious, so every governmental organization makes its effort to solve this problem. Combustible ocean wastes as of ropes, fishing nets, and tires are usually highly polymerized compound materials. The problem of ocean waste treatment can be solved by using the pyrolysis method. Pyrolysis characteristics of ocean waste was examined to get the basic data for the production system of fuel from the ocean waste. Thermogravimetric experiment showed that residual mass rate decreases as the velocity of temperature-rising becomes lower. The pyrolysis of waste rope and fishing net occurs at 300~450$^{\circ}C $ and the waste tire does at 350~450$^{\circ}C $. Pyrolysis time is estimated about 15 to 20 minutes in the temperature range when lively act of pyrolysis temperature reached.

• 문화기술의 융합
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• 제8권3호
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• pp.571-580
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• 2022

해양침적쓰레기는 유령어업으로 인한 폐어구들로 인해 많은 피해와 쓰레기 추정량 편차 증가 등의 문제를 일으키는 주요 원인이 된다. 본 논문에서는 폐어구 사용량, 유통량, 유실량, 회수량에 대한 실태 파악을 위해 실시간 해양침적쓰레기 감지 인공지능 시스템을 구현하고, 성능 개선을 위한 방법에 대해 연구한다. 실시간 객체인식에 우수한 성능모델인 yolov5모델을 활용하여 시스템을 구현하였고, 성능개선 방법으로는 학습데이터의 '데이터 선별 과정'과 '클래스 세분화' 방법을 적용하였다. 결론적으로 비선별된 데이터셋과 클래스가 세분화된 데이터셋의 객체인식 결과보다 불필요한 데이터를 선별하거나 특징 및 용도에 따라 유사 항목을 세분화 하지 않은 데이터셋의 객체인식 결과는 해양침적쓰레기 인식에 개선된 결과를 보인다.

• 한국산업정보학회논문지
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• 제27권4호
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• pp.105-114
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• 2022

국민 소득수준이 향상되고 주택의 도시화 및 경제속도가 빠르게 진행됨에 따라 주거용 생활 폐기물과 음식물류 폐기물이 급격하게 증가하고 있다. 우리나라에서는 1991년 개정된 "폐기물관리법"을 기초로 1995년 생활 폐기물 종량제가 시행되었다. 하지만 시행 이후에도 여전히 음식물류 폐기물의 악취 및 이를 위한 신속한 처리 과정이 사회적 문제로 지속되고 있다. 이러한 이유로 음식 쓰레기 재활용사업이 주목받고 있으며, 음식물류 폐기물의 사료화, 퇴비화, 기타자원화 등 자원 재활용하는 역할에 관하여 본 논문에서는 자원화 과정의 비효율성을 줄이기 위한 음식물류 폐기물 재활용 시(時) 사업장의 경영성과를 향상시킬 요인이 무엇인가에 연구하였으며, 2020년 말 기준 국내 자원 재활용사업을 영위 중인 사업장 394개(공공 238개, 민간 156개) 중(中) 시설물 자료가 미흡한 업체를 제외, 전국 33개 시설 사업장의 투입물과 산출물의 관계를 "자료포락분석"(DEA:Data Envelopment Analysis)을 통해 조사하고, 음식물류 폐기물 시설의 상대적 경영성과에 중요한 역할이 무엇인가에 대하여 연구하였다. 음식물류 폐기물 재활용 사업을 영위 중인 업체의 업력, 시설용량, 자본금, 기계장치가 매출액에 미치는 영향이 무엇인가를 가설로 검증한다.

• 한국환경보건학회지
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• 제38권4호
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• pp.332-339
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• 2012

Objectives: The purpose of this study was to prevent health problems and environmental contamination resulting from inappropriate management of dental wastes and to provide reference data for revision and supplementation of dental clinic waste management guidelines. Methods: From 640 total of dental clinics registered in 16 cities and counties in Gyeongsangnam-do, 100 (60 in Changwon (Masan, Changwon), 29 in Gimhae, and 11 in Jinju) were included in this study. From July 2010 to September 2010, investigators visited the 100 dental clinics and conducted survey interviews using a structured survey questionnaire regarding disposal methods for liquid wastes (suction pump, spittoon container waste, used liquid disinfectants, and X-ray developer), and disposal methods for solid waste (suction pump, spittoon container waste, and general medical waste). Results: All the 100 dental clinics were found to treat liquid waste from suction pumps and spittoon containers in the same manner as general waste water. Nineteen percent of the clinics treated solid waste that was not filtered through the filter of a suction pump as general waste. Fifty or more percent of the clinics treated solid waste in spittoon containers as general waste. Seventy percent of the clinics used disinfectant solution, although most of them treated used disinfectants in the same manner as general waste water. Some clinics treated used X-ray developer and X-ray fixer in the same manner as general waste water. In most of the clinics, used drapes were washed within the clinic. Conclusions: It was found that waste water and dental wastes at some dental clinics were treated in inappropriately. Thus, in conclusion, the development of guidelines regarding proper management of liquid and solid dental waste at dental clinics is required, and hygiene and environmental training for workers at dental clinics is necessary.

• 임상간호연구
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• 제29권3호
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• pp.327-336
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• 2023

Purpose: This study aimed to identify the factors affecting the practice of medical waste management of nurses in tertiary general hospitals after the coronavirus disease 2019 (COVID-19). Methods: The participants were 154 nurses working in two tertiary general hospitals. Data were collected using structured questionnaires and analyzed using an Independent t-test, One-way ANOVA, Scheffé test, Pearson correlation coefficients, and multiple regression analysis using the SPSS/WIN 27.0 program. Results: Factors significantly influencing the subject's practice of medical waste management include medical waste education(β=.18, p=.013), recognition of infection control organizational culture (β=.26, p=.007), and attitudes toward medical waste management (β=.23, p=.011). The explanatory power of these variables for medical waste management practice was 29.0% (F=7.34, p<.001). Conclusion: To improve the practice of medical waste management, a strategy to provide positive attitudes toward medical waste management should be needed when developing medical waste management training programs, and various measures are necessary to make the organizational culture positive for the implementation of infection control guidelines at the organizational level.