침출수의 물리적 농축 방법에 관한 연구

민달기 京畿專門大學 1998 京畿專門大學 論文集 Vol.- No.26

This paper is an experimental research on the capillary separations of the leachate in Kimpo landfilling site using the wood refinary fibers(WRF) and simple wooven textiles(SWT) materials. As a results, WRF and SWT are the very suctionable materials, and especially well separate the insoluble matters and suspended solids. The removal efficiency of the pollutants are 25∼33% in TCOD, and 32∼40% in TS by the WRF and SWT materials. In continues test, the removal efficiency become rise than batch operating. In experimental results, the treatability and concentration rates of the leachate depend on the capillary height and flowrates of the leachate. And in case study, the requirement for the leachate treatment of 100㎥/hr is estimated only 4,410kg of SWT materials under the optimum condition.

광양제철소 폐기물 소각설비의 공정 진단에 관한 연구

민달기 京畿專門大學 2001 京畿專門大學 論文集 Vol.- No.29

This paper is an research on the evaluation of the incineration capacity on Kwang-Yang Steel Plant. As a result, incineration plant have been operated in over-loading condition since 1998, and wastewater sludge (70 ton/day) that is compose 54% of the all incineration matter is defined as a non-combustible matter. So it is a best method that wastewater sludge must be treatment separately, the waste generation have to reduce the quantity, and the combustible fraction in waste must be expand. To build a multi-hearth incinerator or fluidized bed combustor(FBC) for only wastewater sludge, existing incinerator recover the incineration capacity without supplementary fuels.

임신 입덧에 의해 발증한 베르니케뇌증 환자에서 스테로이드 다량요법과 FLAIR MR기법

한영민,유도성,김영주,허필우,조경석,김달수,강준기 대한신경외과학회 1998 Journal of Korean neurosurgical society Vol.27 No.12

국내 주개류의 질적 특성에 관한 연구

민달기,전승렬,정연규,이병찬 연세대학교 산업기술연구소 1993 논문집 Vol.25 No.1

The Waste generated in Korea have three main distinctive features such as heavy generation, highly portion of briquette ash and organic fraction of municipal solid waste(OFMSW). The management of wastes is confined into simple landfill, and furthermore the suitable landfilling site is subject to restriction. Therefore, Korea government has serious excutive problems to manage the wastes. The establishment of data-base and the evaluation of the characteristics about wastes should be done before any affair. Therefore, in this study, such characteristics as OFMSW form, cooking condition, three composition, density, element analysis, and heating value were evaluated. According to the results of this study, generated from domestic kitchen have vegetable waste more than half of total kitchen wastes, and is characterized by high moisture content, low heating value. In addition, it was found that the improvement of food distribution system and meal preparation program would be the most powerful method to reduce the wastes, and reducing the moisture content from the wastes could make the cost of the wastes management cheaper.

국내 주방쓰레기 발생실태에 관한 연구

민달기,박준환,정연규,정연균 연세대학교 산업기술연구소 1993 논문집 Vol.25 No.1

The waste generation rate of Korea is the first rank of the world and waste generation rate is 2.3 kg per capita per day. In spite of the severe waste problem, the management of wastes is very weak and most of wastes landfilled simply, and the study of waste generation and characteristics is also poor. Therfore, in this wtudy, waste source, unit discharge rate and physicochemical property of organic fraction of muicipal solid wastes, (especially food wastes, are inverstigated, and future waste generation is predicted using DYNAMO simulation. As the result, generation rate of food wastes in dwelling area, market place, cafeteria, and food feeding center are 187 g/cap/day, 975 g/㎡/day, 427 g/㎡/day, and 191 g/cap/day respectively. In addition, the total amount of food wastes generation in Korea is estimated 16,395ton/day (or 6million ton/year), or 454g/cap/day as a unit discharge. Also, the food wastes fraction of the total wastes in the year of 2000 and 2010 is predicted increasing by 31.4%(19,302ton/day) and 35.3% (24,362ton/day)respectively.

합성수지 용기의 환경성 평가에 관한 연구

서광석,민달기 京畿專門大學 1999 京畿專門大學 論文集 Vol.- No.27

This paper is a research on the life cycle assessment (LCA) of plastic bag, bottle and container. In order to compare the environmental analysis of plastic, paper, pulp, aluminium, glass and steel material, it is studied by LCA technique from before-discarded step such as the material collection, processing of product, energy and water consumption, and product transportation, to after-discarded step such as waste product transportation, air and water pollutant discharge, waste generation, and treatment and/or disposal of waste. As a results, plastic material has a better environmental assessment than the other materials in before- and after-discarded step. So, plastic material must be newly concerned with a green material, and must be reappraised to the waste-deposit systems.

회전원판법에 의한 페놀성 폐수처리시 중금속의 영향에 관한 실험적 연구

정연규,민달기,배범한,신창호 연세대학교 산업기술연구소 1988 논문집 Vol.20 No.2

본 연구는 회전원판법(RBC) 에 의한 페놀성 폐수의 처리시 Cd(II), Zn(II) 가 페놀 및 페놀성 유기물 제거에 미치는 영향을 비교 분석한 것으로 pH , 온도, 체류시간, 회전속도를 일정하게 한 뒤, 일정한 페놀농도 system 에 Cd(II), Zn(II) 농도의 단계적 변화 후 정상상태(Steady State)에서 페놀과 페놀성 유기물 제거율 및 Cd(II), Zn(II) 농도를 측정하였다. 본 연구에서 실험결과를 분석하여 얻은 결론은 다음과 같다. 미생물이 Cd(II), Zn(II)의 독성에 영향을 받아, 페놀 및 페놀성 유기물제거율이 감소되었다. 특히, 페놀농도 400mg/L system 에서 Cd(II), Zn(II) 50mg/L 을 유입시킬 때 페놀 및 페놀성 유기물제거율이 50% 미만으로 감소되었다. 또한 Cd(II), Zn(II) 유입으로 system 내의 미생물 종류변화가 거의 일어나지 않는다는 사실을 알 수 있었다. This study is an experimental research about the effects of heavy metal on treatment of phenol and phenolic organics using Rotating Biological Contactors. The concentrations of phenol, phenolic organics, and heavy metal are measured at study after the concentration of heavy metal is made to be changed by steps in constant phenolic concentration system. The temperature, pH, retention time, and the time of rotation are set to be constant. This results of this study obtained by analysing the experimental data are as follows: (1) Phenol removal efficiency and phenolic organics removal efficiency decreased because micro-organism was affected by the toxicity heavy metal. (2) When heavy metal concentration 50 mg/L was inflowed in phenol concentration 400mg/L system, phenol and phenolic organics removal efficiency decreased less than 50 percents. (3) It can be known that change of microorganism species with system was not occured by heavy metal inflow.

Ⅲ형 침전의 특성에 대한 실험적 고찰

김남천,민달기 서울保健大學 1988 論文集 Vol.8 No.1

국내 우유용기 생산 및 사용실태 조사·분석

서광석,민달기 京畿專門大學 2000 京畿專門大學 論文集 Vol.- No.28

Up to now all carton packs used for milk container in our country have been imported abroad. With rapid increase of interest on environment and waste recycling, Environmental Societies and Civil Consumer's Organization restart the Use of Glass Bottle for Milk Movement. From preliminary survey result that glass bottle had many advantages in most test items, we chose the glass bottle as substitute for carton pack, and proposed some regulations such as usable range and detailed regulation, etc. Because at this time it is impossible to rebuild whole pack manufacturing process to substitute carton pack to glass bottle, it may be more favorable to use glass bottle for milk packing under some restricted condition such as easy recollection and reusable circumstances. In addition some governmental regulations to promote glass bottle milk productions and sale and to return all used glass bottles are absolutely required in group catering system. If above is impossible, it will be next choice to set up regulations of milk packing as well as to use glass bottle at some position, and adopt a consumer deposit system in order to increase glass bottle usage, which will help environmental protection and economy.

고·액 분리를 위한 모관분리능의 수학적 모델 산정에 관한 연구

서광석,민달기 京畿專門大學 1997 京畿專門大學 論文集 Vol.- No.25