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영양염류 농도에 따른 부레옥잠(Water hyacinth)의 성장특성에 관한 연구
전만식,김범철 江原大學校 附設 環境硏究所 1994 環境硏究 Vol.11 No.-
The growth rate and the nutrients removal efficiency of water hyacinth in artificial medium were studied. Water hyacinth showed maximum growth rate at the density of 5-18㎏ wet wt./m^(2), when the yield was 0.67-1.23㎏ wet wt./m^(2)/day. The removal rate of phosphorus and nitrogen was 153 and 1,184㎎/m^(2)/day, respectively. Growth rate significantly decreased at low nutrients concentration below 0.8㎎P/ℓ and 3.1㎎N/ℓ. The maximum specific growth rate(μ_(max)) of water hyacinth was 0.101day^(-1) and half saturation concentration(Ks) was 0.032㎎P/ℓ and 0.410㎎N/ℓ for phosphorus and nitrogen, respectively. The shoot/root weight ratio, varying from 1.8 to 14.1, was smaller at low nutrient concentration due to the enhanced development of root. The contents of phosphorus and nitrogen in the dried tissue were 0.22-1.02% and 1.4-4.3%, respectively. The water content was 88.9-93.9%. The removal efficiencies of P and N were 90% and 71% when retention time was 5.7day, and the standing crop was 3.8㎏/m^(2).
전만식(Man Sig Jun),김범철(Bom Chul Kim) 한국환경생물학회 1999 환경생물 : 환경생물학회지 Vol.17 No.1
Nutrients removal by water hyacinth, Eichhornia crassipes(Mart.) Solms from nutrient enriched waters and swinery wastewater were evaluated. The contents of nitrogen and phosphorus of dried water hyacinth increased from 1.4 to 3.3% and 0.21 to 0.80% when water hyacinth available N and P in the culture medium were increased from 0.7 to 5.0 ㎎N/l and 0.06 to 1.5㎎P/l, respectively. Maximum N and P contents were found to be 4.1 and 0.90%, respectively. The significant relationship was observed between the standing crop of water hyacinth and the biomass yield per unit area and time. Biomass yield increased gradually until standing crop reached 15㎏ wet wt./㎡, and then rapidly decreased. The high biomass yield of up to 0.5㎏/㎡/day was obtained in the range of 7 to 20㎏/㎡ of standing crop. The potential removal rates of N and P by the water hyacinth during summer were found to be 2,250 to 2,710 ㎎N/㎡/day and 570 to 595㎎P/㎡/day, respectively, when 15㎏/㎡ in standing crop and nutrient concentrations of culture medium were ranged from 1.24 to 6.2㎎P/l and 3.2 to 32.5㎎N/l, respectively. Inorganic N and P concentrations of swinery wastewater were in the range of 82 to 121 ㎎N/l and 22 to 79㎎P/l, respectively. Nitrogen and P removal rates of water hyacinth cultured in swinery wastewater were found to be in the ranges of 2,000 to 2,600 ㎎N/㎡/day and 157 to 254㎎P/㎡/day, respectively, at 10 times diluted water of swinery wastewater.
전만식(Jun Man Sig) 강원대학교 비교법학연구소 2006 江原法學 Vol.23 No.-
The Ministry of Environment has been seriously considering implementing TMDL(Total Maximum Daily Load) as a mandatory requirement on the Pal-Dang watershed due to the limited alleviation of the water pollution shown in the area and the inadequacy derived from being the only river among the other 3 rivers exempted from such system. The purpose of this paper is to analyze some of the ongoing problems associated with the TMDL and to suggest proper ways of implementing it after considering its adequacy in the implemented region. The TMDL seems appropriate and scientific at first. However, it has a great deal of systematic and technical problems to be solved prior to its implementation. From the technical point of view, insufficient data, reliability of contamination load, reduction of contaminated materials, effects of dam, limited model of water quality are some of the associated problems. Therefore, there would be more of loss than gain when TMDL becomes effective; consequently, it may lead to a policy failure and produce a heavy burden. For the management of the quality of the waterway of Han River, cooperation coming from the central and regional governments as well as effective policies for the adequate development of the upper and downstream of Han River should be preceded. For example, an average BOD per unit area should be set first. Any areas that exceed the limit should pay fines, and the areas without exceeding the limit should be given incentives or development rights accordingly. Moreover, the system of TMDL should be implemented for no other reasons but for the management of the quality of water only. It should be implemented only after resolving already existing institutional and technical problems, namely, easing up the development restrictions around the capital city as well as imposing and withdrawal of incentives. TMDL requires high social expenditure. Thus, this should not be a system built for the entire waterway. The watershed management should be implemented so as to foster the practical water quality management and save the expenses.
이만식(Man Sig Lee),정충택(Chung-Taeg Cheong),이광호(Gwang-Ho Lee),김준호(Jun-Ho kim),이근대(Gun-Dae Lee),홍성수(Seong-Soo Hong) 한국표면공학회 2002 한국표면공학회지 Vol.36 No.1
Zinc phosphating for cold forming of steel was studied with emphasis on decreasing phosphating temperature. To lower phosphating temperature, some techniques, such as adding Cu ion into bath, using activator in the form of pre-dip, and aeration in bath, instead of using conventional accelerator, namely oxidizing agent, have been tried. It was revealed that phosphating, leading to coatings of improved uniformity and fine crystal size, can be carried out using above techniques at lower temperature (55℃) compared to conventional phosphating temperature (80~90℃). Under present condition, it was seen that optimum concentrations of Cu ion in phosphating bath and activator in pre-dip are 0.015% (w/w) and 2.0 g/l, respectively. The coating weight was within the range of 15~20 g/㎡. When lubricant was applied into phosphating coatings, the amount of lubricating component (total soap) was found to be 6~10 g/㎡ and the lubricated panel revealed excellent lubricating properties.
화학산업의 인벤토리 구축 및 공정진단을 통한 온실가스 배출 저감에 관한 연구
안준기(Ahn, Jun-Ki),조경오(Cho, Kyoung-O),조현래(Cho, Hyun-Rae),이만식(Lee, Man-Sig) 한국산학기술학회 2011 한국산학기술학회논문지 Vol.12 No.7
본 연구는 기후변화 대응을 위한 온실가스 인벤토리 구축 및 공정진단을 통해 온실가스 배출 저감 결과를 나타내었다. 또한 기업체의 기후변화 대응에 대한 방향을 제시하였다. 울산지역은 산업단지 중심으로 석유화학, 자동 차, 조선 등 에너지 다소비업체가 많으며, 이산화탄소 배출 저감을 체계적으로 실시 할 경우 국가적 차원에서 이산화 탄소 배출량을 상당히 줄일 수 있을 것으로 판단되어 10개 기업체 대상으로 본 연구를 실시하였다. 10개 기업체 중 5개 기업체의 온실가스 배출량 산정 및 인벤토리 구축 결과 온실가스 배출량의 공정에 따른 직접배출이 높은 것을 알 수 있었다. 또한 에너지 및 온실가스 저감을 위해 약 온실가스저감 227,554만원 경제적 효과 및 온실가스 이산화 탄소 50,740 ton/yr 절감효과를 발생하였다. This study showed the reduced greenhouse gas(GHG) emission through GHG inventory establishment and process diagnosis for a response to climatic change. Also, it presented a direction for company's response to climatic change. Ulsan from its industrial complex has many energy-intensive companies such as petrochemistry, automobile and shipbuilding, and as we judged that the systematic reduction of GHG emission would make a considerable reduction of GHG emission in national dimension we executed this study from 10 companies. It showed the high rate of direction GHG emissions by its process that 5 of 10 companies calculated GHG emission and built its inventory. Also, in order to reduce energy and GHG, it produced about 227,554 million won of its economic effect and 50,740 ton/yr of its sparing effect.
영양염류 농도에 따른 부레옥잠 ( Water hyacinth ) 의 성장특성에 관한 연구
전만식,김범철 ( Man Sig Jun,Bom Chul Kim ) 한국물환경학회 1994 한국물환경학회지 Vol.10 No.2
The growth rate and the nutrients removal efficiency of water hyacinth in artificial medium were studied. Water hyacinth showed maximum growth rate at the density of 5-18㎏ wet wt./㎡, when the yield was 0.67-1.23㎏ wet wt./㎡/day. The removal rate of phosphorus and nitrogen was 153 and 1,184㎎/㎡/day, respectively. Growth rate significantly decreased at low nutrients concentration below 0.8㎎P/ℓ and 3.1㎎N/ℓ. The maximum specific growth rate(μ_(max)) of water hyacinth was 0.101day and half saturation concentration(Ks) was 0.032㎎P/ℓ and 0.410㎎N/ℓ for phosphorus and nitrogen, respectively. The shoot/root weight ratio, varying from 1.8 to 14.1, was smaller at low nutrient concentration due to the enhanced development of root. The contents of phosphorus and nitrogen in the dried tissue were 0.22-1.02% and 1.4-4.3%, respectively. The water content was 88.9-93.9%. The removal efficiencies of P and N were 90% and 71% when retention time was 5.7day, and the standing crop was 3.8㎏/㎡.
Moon Sook Kim,Man-Sig Jun,Cho A Kim,Jihae Yoon,Jin Hee Kim,Ga Youn Cho 한국조류학회I 2015 ALGAE Vol.30 No.3
The genus of leafy green algae, Prasiola Meneghini, includes marine, terrestrial, and freshwater species. A total of 11 species and one variety have been identified in China, Korea, and Japan. In Korea, Prasiola formosana var. coreana has been reported in Muncheon, North Korea, while a different type of Prasiola species has been reported in South Korea. The South Korean species has been found growing along a small stream originating from Chodanggul Cave, a limestone cave in Samcheok, Gangwon Province. Here, we revised the morphological characteristics of the South Korean Prasiola species and analyzed plastid rbcL, psaB, and tufA genes to clarify its identity. Although the external and anatomical morphologies varied among individuals, our results were very similar to previous reports. Plastid three genes sequences of the South Korean specimens were identical to those of P. japonica collected from Japan as well as to published sequences of P. yunnanica from China. A short rbcL-3P sequence (196 bp) from P. formosana var. coreana, which was identified in the type specimen, was also identical to a sequence from P. japonica. These Prasiola species and variety from Korea, Japan, and China are all distributed in areas characterized by limestone bedrock. Based on morphological, phylogenetic, and distributional features, the South Korean Prasiola species is regarded herein as P. japonica. Here, we also propose to synonymize P. formosana var. coreana and P. yunnanica with P. japonica.