• 한국환경농학회지
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• 제26권1호
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• pp.25-35
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• 2007

인공습지나 수변녹지 및 완충 저류지와 같은 수질정화시설을 조성하는데 이용할 수 있는 수생식물을 선발하고자 낙동강 하류에 자생하는 수생식물과 외래 수생식물, 습생작물을 대상으로 부영양화 성분(T-N, T-P) 및 EC 관련 무기성분에 대한 정화능력을 검정하였다. 수생식물의 생육기간 동안 $225{\sim}444\;L\;m^{-2}$ 범위의 생활오폐수를 사용하였으며, 건물생산량이 많았던 벼와 부들, 줄, 비자루국화, 율무, 털물참새피 등이 350 L $m^{-2}$ 이상으로 가장 많은 생활하수를 소모하였다. 질소와 인의 체내흡수량과 실제 정화능력(정화효율 및 정화량) 및 수확 후 토양을 분석한 결과, 초장이 크면서 건물량도 많았던 벼, 비자루국화, 부들, 율무, 털물참새피, 줄 등이 부영양화성분에 대한 우수 정화식물로 선발되었다. 무기성분 중 K에 대한 정화력은 부영양화성분의 우수 정화식물로 선발된 수생식물과 더불어 물상추와 부레옥잠이 높은 결과를 보였다. EC와 관련이 높은 Ca와 Na, Cl에 대한 정화효과가 우수한 수생식물로는 물상추와 부레옥잠, 털물참새피가 선발되었으며, 특히 털물참새피는 $SO_4$에 대한 정화효과도 뛰어났다.

• 한국전산유체공학회지
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• 제22권1호
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• pp.1-7
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• 2017

The mixing of water and chemicals is an important process in the water purification plant. In this paper, we compare PDM(pump diffusion mixer) and hydraulic mixer at the basin in the mixing process. The proper flow rates are predicted and compared in both mixers using CFD technique. As a result, the flow rate of purifier chemical liquid should be 5% of that of water for the optimal performance of mixing process. The characteristics of the two mixing methods are compared with each other for strong and weak points on the operation of the purification system, discussed in the view point of CFD simulations.

• 수도
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• 통권14호
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• pp.10-29
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• 1978

• 수도
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• 제22권3호통권73호
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• pp.120-131
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• 1995

• 한국농공학회논문집
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• 제58권6호
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• pp.47-54
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• 2016

This study is a basic research on the functional performance review for the use of environmentally friendly construction materials as lapilli-bio block. The neutralization processed Mt. Backdusan and Mt. Hallasan lapilli-bio block were identified vegetation characteristics and water purification properties. As a result, the adsorption of root was more favorable, depending on the material properties of many voids Lapilli. And if the neutralization processed lapilli-bio blocks maintain a long-term immersion conditions in contaminated water was found to be expected from the improvement effect of SS, T-N and T-P. However, field trials and continuous studies are expected to be identified by the use of lapilli-bio block.

• Journal of the Korean Wood Science and Technology
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• 제15권4호
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• pp.12-17
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• 1987

To extract arabinogalactan from larch (Larix Leptolepis), chips immersed with water(20-$90^{\circ}C$) for 1hr, were defiberized by refiner. The liquors were recovered and purified to pure arabinogalactan by ion exchange resin(IRC-50 a. IR-45) or MgO. Additionally the optimal condition in purification with MgO was also investigated. 1. The amounts of solids(crude sugars) and pure arabinogalctan in solids are 8.6-11.3% and 7.3-8.5%(raw material = 100), respectively. 2. Phenolic materials in crude sugars are removed up to 96-89% by ion exchange resin and 94-88% by MgO, while recovery yields of pure arabinogalactan are 81-75% on purification with ion exchange resin and 91-87% on purification with MgO. 3. The optimal conditions of purification with MgO are the addition of 35mg MgO/0.5g of crude sugars, 45 minutes at $70^{\circ}C$, or 25 mg MgO, 30 minutes at $85^{\circ}C$.

• Tribology and Lubricants
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• 제38권4호
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• pp.121-127
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• 2022

This study presents the development of an integrated oil purification system consisting of moisture removal, oil flushing, and oil filtering devices. In this system, the oil flushing device is combined with a micro-bubble generator. Oil purification is necessary for ensuring the high performance of the lubricant through the efficient removal of contaminants and thus enables good maintenance of mechanical systems. The developed purification system removes moisture, varnish, and solid particles. Moreover, during oil purification, the oil flushing device separates foreign materials and contaminants remaining in the lubricating oil piping or mechanical systems. The microbubble generator, which is combined with the oil flushing device, can separate harmful contaminants, such as sludge, wear particles, and rust, from piping or lubrication systems through the cavitation effect. Moisture is removed using a double high-vacuum chamber, while sludge and varnish are removed via electro-absorption using a high-voltage generator. Additionally, the total maintenance cost of the system is reduced through the use of domestically fabricated cartridge filters composed of glass fiber and cellulose. The heater, which maintains the temperature of the lubricant at 60℃, can process 41,000 L of lubricant simultaneously. Multiple tests confirmed that the proposed integrated purification system exhibits good performance in oil flushing and removal of water and varnish.

• 한국환경과학회지
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• 제2권4호
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• pp.291-297
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• 1993

The COD values and chloride ion concentrations of the Taewha river flowing through Ulsan area were determined along the main stream and the relationships between CODs and chloride ion concentrations were described. The results showed that the middle-upper stream and downstream of the Taewha river were polluted deeply with municipal sewage and self-purification occured in the middle-downstream of the river. When domestic sewage is a main source of pollutants, and is especially the only source of chloride in the stream water, the ratio of COD/[$\textrm{Cl}^{-}$] will be utilizable as a measure of self-purification of the stream.

• 한국농공학회:학술대회논문집
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• 한국농공학회 1998년도 학술발표회 발표논문집
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• pp.500-507
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• 1998

The measures for water quality improvement have been planned to introduce for several reservoirs which were badly polluted among the sites included in the Network of Agricultural Water Quality Survey (NAWQS). Considering conditions of circumstances around reservoirs, self-purification systems such as natural ecosystem, oxidation ponds with plants, grassed waterways, weirs, and manmade plant-islands are taking into account enhancing to trap nutrients in waters running off from agricultural lands. The Pollutant Run off Ratios were analysed to predict the effects of water quality improvement for self-purification systems. The cost of water quality improvement was evaluated. The correlation equation between cost and irrigation area showing high correlation coefficient was derived.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2009년도 춘계학술발표회
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• pp.39-40
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• 2009

하천관리의 기본 목표는 안정적인 수량의 확보와 수질의 확보이다. 아울러 재해를 예방하고 안정적으로 용수를 확보하며, 자정 기능의 유지와 하천 생태계를 유지하면서 친수, 생활, 문화, 산업 공간으로 활용되면서 인적, 물적, 생물들이 교류하여 하천을 통한 문화와 산업이 활성화 되어야 한다.