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도갑수,이성희 동아대학교 환경문제연구소 1986 硏究報告 Vol.9 No.3
The management of generating source was studied for effect treatment and disposal of municipal solid waste(MSW). Two house with boiler using briquette, one apartment with central heating system and Bukhan National Park were selected in this study as generating source. Generation rate, composition and properties such as moisture volatile solid(V.S), fixed solid(F.S) and lower heating value(LHV) of each materials in the MSW were measured weekly, and the collection system of MSW in Seoul city were investigated. From this experimental results, the following conclusions were obtained. 1. The annually average generation rate of MSW was 377g/cap.day in the case of apartment and 1350g/cap.day in the case of house which involved briquette ash in 75wt%. 2. As the generation rate changes in a large range in our country(the number of month within 15% above or below yearly mean were more than 33%), It is very difficult to determine the size of collection and treatment facilities. 3. It was possible to recover directly papers and plastic to 90% and 80%of them respectely from the generating source. In this case, the waste resources could be with good quality within 10% moisture content. 4. The weight proportions of garbages(vegetable, food and fruits) and plastic were 46.9 and 9.7wt% in annually average respectively, which were higher than those in other country. The moisture content and V.S. content of MSW were 45.3 and 41.4/wt% in annually average. 5. The lower heating value of MSW was measured to be 2170㎉/㎏ in wet basis after briquette separation, but to go down 800㎉/㎏ after papers and plastic recovery. 6. The equations for estimating LHV in wet basis were obtained in This equation (7) and (8), was found to be more correct than other equations. LHV = 4500Vc + 9500Vp-600W[㎉/㎏]···(7) LHV = 7260 Pi + 2950Pa + 640(P_(G)+P_(F))+4000Pc-600W[㎉/㎏]···(8) 7. The collection system containing separated collection in Seoul city was ineffective owing to the lack of landfill site and loading place of MSW. 8. It is necessary for as to take proper management system for solid waste in the National Park because visitors and generation quantity of solid waste change largely according the place and season. 9. The major collection facilities in the National Park were waste basket and incineration box, but the incineration box was too large and its collection period was irregular, so it was cause to the congestion of solid waste and bad smell. Therefore, we must set up the more waste basket which able to fine within 40∼50 m from the origination place of solid waste and induce the visitor to throw the solid waste, and remove the incineration basket to one-third of total volume for the only purpose of open burning of solid waste at elevated place.
도갑수,이승용 한국화학공학회 1984 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.22 No.4
젖은 벽탑을 사용하여 증류수에 의한 공기중의 산소의 물질전달에 대하여 온도와 액체유량의 영향을 연구하였다. 실험결과치로부터 총괄액상물질전달계수를 계산하였다. 실험은 Reynolds 수가 220∼540, 온도가 5∼40℃의 제한된 범위에서 행하였다. 본 연구의 결과로서; 1. 총괄액상물질전달계수에 대한 온도의 영향은 다음과 같다. K_(L(t)) = K_(L(20)) 1.007^((t-20)) 2. 젖은 벽탑에서 실험결과치의 무차원 상관관계식은 다음과 같다. Sh_L = 83.89(Re_f)^(0.0752) (Sc_L)^(0.2607) A Study on the Oxygen Transfer in the Wetted-Wall Column The effect of temperature and liquid flow rate in the mass transfer of oxygen to liquid water in the wetted wall column was studied. The over-all liquid phase mass transfer coefficient were calculated from the experimental data. The runs were made over a limited range of Reynolds number 220 to 540 and temperature 5℃ to 40℃. As a result of this study: 1. The effect of temperature on over-all liquid phase mass transfer coefficient was obtained as follow K_(L(t)) = K_(L(20)) 1.007^((t-20)) 2. The dimensionless correlation of the experimental data in the wetted wall column was obtained as follow. Sh_L = 83.89(Re_f)^(0.0752) (Sc_L)^(0.2607)