• Food Science and Preservation
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• v.21 no.3
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• pp.357-364
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• 2014

The quality improvement of the boiled-dried anchovy treated with acidic electrolyzed water (AEW) was investigated. The L value was higher in the anchovy treated with AEW than in the control. Moreover, its ${\Delta}E$ value was 5.08 higher than that of the control. The lipophilic browning degree was also higher than the hydrophilic degree. The degrees of calcium absorption of the control and anchovy treated with AEW were 10.77% and 12.61%, respectively. During their storage in the different conditions (five weeks in $20^{\circ}C$, ten weeks in $4^{\circ}C$, and five months in $-20^{\circ}C$), the lipophilic browning degree of the anchovy treated with AEW was significantly lower than that of the control at the $20^{\circ}C$ storage. The volatile basic nitrogen (VBN) content gradually increased as the storage period increased. During the $20^{\circ}C$ storage, the content of the anchovy treated with AEW was lower than that of the control. The lipid peroxide contents increased with the storage periods, regardless of the temperature, but the content of the anchovy treated with AEW was lower than that of the control. These results indicate that AEW treatment can improve the color quality of boiled-dried anchovy and reduce its VBN and lipid peroxide contents.

• Journal of Environmental Policy
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• v.14 no.2
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• pp.133-148
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• 2015

The number of used oil refining companies has been increased and it causes shortage of the volume of used oil per recycling company. In addition, the number of used oil collecting companies has been increased and it caused excessive competition among companies with excessive costs. Companies use not only proper used oil but also low quality used oil because of shortage of supply. It is the reason of environmental pollution. Also excessive competition brings high cost of refined oil and it becomes a burden on the consumer. Therefore, the recycling improvement plans of used oil is needed because of these causes. First of all, importing used oil from the developed countries of OECD is the one of solution to secure a used oil supply. However, imported used oil should meet the international quality standards and it is examined twice by international authority institute such as K-petro in both exporting and importing countries. Second, the cost would be reduced with the relaxation on regulations of used oil refinement. However, regulation to sediment and water should be separated. Sediment should be kept within 2% and water should be kept within 5%. It is the way to relax the regulations of used oil refinement with preventing environmental pollutions. Finally, the standard of used oil for heater should be regulated strictly. To prevent pollutions, used oil for heater is limited to high quality waste lubricating oil. Also the air pollution prevention device has to be installed on heater.

• The Journal of the Korea Contents Association
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• v.13 no.10
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• pp.266-277
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• 2013

Climate change asks the government to make changes in water management system. Although water demand is increasing according to urbanization, clean and safe water supply is limited. Therefore efficient water management is one of the key issues. Korean water management system is evaluated inefficient because it is executed by five different ministries. This study reviewed previous literature about Korean water management system, analysed present function sharing among 5 ministries, and conducted survey on improvement of water management system. Experts recognized that the most important problem of water policy is the failure of policy coordination among Ministries, and the solution of it is to make a new integral organization or to integrate related functions into one Ministry. Based on them, this study conclude that the central government functions related with water management need to be integrated on a new organization or Ministry of Environment focused on water quality improvement in the light of preservation instead of development.

• Fire Science and Engineering
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• v.22 no.5
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• pp.105-111
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• 2008

Improvement of fire investigation system is required to supplement problem that can happen after product liability law enforcement of our country. This treatise searches special quality of inside and outside of the country fire investigation that was enforced present with theoretical background of manufacture water responsibility law and compared. And is based and grasped objective and hangup in police fire investigation, fire fighting fire investigation, engine fire investigation of private fire judgment. By improvement way accordingly first, proposed fire emotion connection studies and establishment and connoisseurship qualification system establishment etc. in the common people private fire diet, judgment, analysis company's necessity second, fire fighting of fire investigation system, police's member anger third, college.

• Journal of the Korean Society for Marine Environment & Energy
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• v.1 no.2
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• pp.60-70
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• 1998

Masan Bay is a typical enclosed coastal sea and receving body of discharges from Masan city and Changwon city. A POTW(Publicly Owned Treatment Works) started operation from November 1993 when the population of drainage area increased abcent 1.0 million and the effluent from this Plant has being discharged to the enclosed sea where is located at 15km distance from inner Masan Bay. Thus the inflow pattern to Masan Bay has been changed. The main objective of this research is to evaluate the relationship between urban wastewater discharge and water qualify change in a typical coastal zone. It is necessary a) to evaluate the change of input loadings, b) to determine the effect on water quality changes, and c) to find the respective importance of improvement options that must be controlled in the wastewater treatment plant. It was concluded that the sea water quality has being adversely affected by the discharge of insufficiently treated urban wastewater and the nutrient removal in wastewater treatment was very important and urgent.

• Proceedings of the Korea Water Resources Association Conference
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• 2008.05a
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• pp.1957-1961
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• 2008

대전광역시는 대전시의 3대 하천 살리기 사업 중 하나로 갑천을 2009년까지 수영이 가능한 하천으로 개선하는 '갑천 수질개선 기본계획'을 추진하고 있다. 이러한 계획이 성공적으로 수행되기 위해서는 오염물질을 포함하는 지류의 수질을 개선하는 것이 우선되어야 한다. 대전의 탄동천은 상류에 군부대 시설이 밀집해 있고 하수처리장이 운영되고 있는 관계로 하천 수질은 일반적인 하천에 비하여 높은 오염도를 나태내고 있다. 또한 중류지역의 주거시설에서 하수시스템으로 완벽하게 연결되지 못한 부분에서 오염물질이 유출되는 것으로 추정되며, 연구단지등에서 강우시 유출되는 비점오염물질 등이 하천의 수질에 영향을 미치고 있다. 본 연구에서는 탄동천의 상류 자운동의 자운1교부터 갑천과 합류되기 전의 국립중앙과학관 앞까지의 7.4km 구간의 6개 지점과 하수처리장 방류수, 우수 관거 및 지류인 삼성천 등 6개 점오염원 지점의 총 12개 지점에 대하여 현장조사 및 수질측정 을 진행하였다. 본 연구에서는 하수처리장으로 더 이상 제어하기 어려운 오염물질 농도를 추가로 저감하기 위하여 지표형 인공습지 운영 및 설계방안을 연구하였다. 인공습지를 합리적으로 설계하는 경우 결과 탄동천의 수질을 개선할 수 있을 뿐만 아니라 하천 환경을 개선하고 경관을 개선하는 효과가 있을 것으로 기대되며 도시형 소하천들의 수질 개선에 긍정적인 영향을 미칠 것으로 기대된다.

• The Journal of Engineering Geology
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• v.20 no.1
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• pp.25-33
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• 2010

Most of contaminated groundwater in the study area was contaminated by $NO_3-N$ due to inflow of contaminated shallow surface groundwater inflow into groundwater well. Poor grouting and teared screen have increased contaminated shallow surface groundwater inflow into groundwater well. Contaminated shallow surface groundwater was inflowed into groundwater well throughout faults, joints and fracture zone of ESE-WNW, NNW, NW-SE and NS direction. The objective of this paper is to evaluate an improvement of water quality for contaminated groundwater by $NO_3-N$ using compression packer. For this study groundwater samples collected from 46 groundwater wells were analyzed to clarify $NO_3-N$ contents. Groundwater wells over 10 mg/L in $NO_3-N$ content is 9 wells showing 20% among total samples. $NO_3-N$ contents after compression packer installation showed 26~81% low value compared with before compression packer.

• Journal of the Korean association of regional geographers
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• v.4 no.1
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• pp.15-25
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• 1998

A stream plays an important role as the source of drinking water, the ecological space and the living space. But the today's urban stream whose ecosystem is destroyed and water quality become worse in consequence of covering, concrete dyke construction, and the adjustment of high-water-ground[dunchi], is deprived of the function as a stream. Therefore this paper aims to elucidate the role that urban stream plays ecologically and to try to find a improvement to the problem. A stream is the pathway through which several types of the solar radiation energy are transmitted and the place which is always full of life energy. In the periphery of a stream, primary productivity is high and carrying capacity of population is great. Thus ancient cities based on agricultural products grew out of the fertile surroundings of stream. In Korea most cities of the Chosen Dynasty Period based on the agriculture have grown out of the erosional basins where solar energy is concentrated. The role of a stream in this agricultural system is the source of energy and material(water and sediment) and a lifeline. In consequence of the growth of cities and the rapid growing demands of water supply after the Industrial Revolution, a stream has become a more important locational factor of city. However, because cities need the life energy of urban streams no longer, urban streams cannot play role as a lifeline. And As pollutant waste water has poured into urban streams after using external streams' water, urban streams have degraded to the status of a ditch. As the results of the progress of urbanization, the dangerousness of inundation of urban stream increased and its water quality became worse. For the sake of holding back it, local governments constructed concrete dyke, adjusted high-water-ground[dunchi], and covered the channel. But stream ecosystem went to ruin and its water quality became much worse after channelization. These problems of urban stream can be solved by transmitting much energy contained in stream to land ecosystem as like rural stream. We should dissipate most of the energy contained in urban stream by cultivating wetland vegetation from the shore of stream to high-water-ground, and should recover a primitive natural vigorous power by preparation of ecological park.

• Journal of The Korean Society of Agricultural Engineers
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• v.53 no.3
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• pp.13-17
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• 2011

There was a transition from participatory irrigation management (PIM) to public irrigation management (PubIM) in Korea when Korea Rural corporation and Community (KRC) merged with Farm Land Improvement Associations (FLIAs), which had managed 60 % of irrigation areas. While making a number of achievements, some problems occurred in the public irrigation management, such as lack of farmers' participation, increased amount of water usage, and elevating operating costs. Accordingly, this paper suggested ways to increase efficiency in water usage and reduce operating costs under the public management through the motive power of farmers participation. First, WUGs replaced the discarded water management committee should be reorganized to revive the concept of PIM in the form of autonomously reinforced one and the roles and functions of WUGs and the board of representatives should be strengthened. The member of new type of WUGs should participate in the national and regional water management committees as a stakeholder of irrigation water user. And also new type of WUGs initiates not only the management of irrigation water but also the management of irrigation water quality and non-point source pollution in the watersheds. Those additional activities of WUGs should be properly compensated. Second, subsidies (direct payments) should be provided to faithful farmers as an incentive for their labor supply. Third, water fees could be charged to large scale agriculture companies. Fourth, professional managers could be hired, management targets would be adjusted, and incentives should be offered. These efforts are expected to improve the irrigation management by encouraging farmers' participation under public system.

• 한국신재생에너지학회:학술대회논문집
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• 2010.06a
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• pp.172.2-172.2
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• 2010

This study was carried out in order to reduce the installation expense of heating system for greenhouse comparing to geothermal heat pump and develope the coefficient of performance (COP) for a heat pump. For getting plenty of heat flux from geothermal energy. Surface water in river channel was used for getting a lots of geothermal heat by penetrating water through underground soil layer of the river bank that make heat transmission to passing water. The range of water temperature after the process of Ground filtration is 13~18 degrees celsius which is very similar to low heat source of geothermal heat pump system and the plenty amount of heat source from that make the number of geothermal heat exchanging hole and the expense for geothermal heat exchanger construction reduced. Drainage well is also used for returning filtration water to the aquifer that keep the water good recirculation from losing geothermal heat and water resource. For the COP improvement of Heat pump, thermal storage tank with separating insulation plate according to the temperature difference make the COP of Heat pump that is similar to thermal storage tank with diffuser. Developed thermal storage tank make construction expense cheaper than customarily used one's. and that sand filter and oxidation sand (FELOX) are going to be used for improving ground filtration water quality that make heat exchanger efficiency better. All above developed component skill are going to be set on the Ground filtration water source heat pump system and applied for medium, large scale for protected greenhouse in riverside area and on-site experiment is going to do for optimizing the heating system function and overcome the problem happening in the process of on-site application afterward.