• Journal of Navigation and Port Research
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• v.34 no.5
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• pp.375-381
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• 2010

This study was carried out for advanced treatment development on shipboard sewage. We employed SBR process using Bacillus sp. to remove Organic compounds, Nitrogen and Phosphorus simultaneously. Based on Res. MEPC.159(55) the system was qualified. From the results it was suggested that SBR system might be suitable process for shipboard sewage treatment in terms of pollutant removal efficiency, maintenance and special environmental conditions of ship. More than 90% of COD and BOD were removed. In addition, aover 50% of T-N and T-P were reduced.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2014.10a
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• pp.85-86
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• 2014

본 연구에서는 유입수의 변동이 심하고 전문가가 부재한 환경인 선박에서 발생하는 오수의 효과적인 처리를 위하여 RCM공법을 선박오수처리장치에 적용하는 실험실 규모의 실험을 수행하였다. 질소 인의 고도처리 효율과 선박이라는 특수환경과의 접목성을 검토한 결과 RCM공정에 유효미생물을 주입하는 방법은 선박환경에 적합한 것으로 평가되었다. 또한 RCM공정은 활성슬러지 공정에서 배출되는 슬러지는 배출시키지 않고 슬러지액화분해조(SDC)에서 재분해하여 순환함으로써, 최근 해양투기가 금지됨으로 인해 문제가 되고 있는 슬러지의 발생량을 최소한으로 하여 친환경적인 수처리가 가능하다. 복합미생물제제 주입 후 미생물 관찰결과 고도처리에 유리한 미생물종의 출현을 확인하였으며 이들의 상호기작으로 질소 인의 처리에 도움을 주어 처리효율이 높은것이라 판단된다. 유기물 제거효율 실험결과 $BOD_5$, CODcr T-N, T-P의 처리효율이 각각 96, 97, 78, 81.68 %로 나타나 Membrane이나 Filter없이도 강화되어가는 해양오염기준을 충족시킬 수 있는 공정으로 판단된다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.11A
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• pp.853-860
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• 2011

In this paper, we proposed a transmission scheme for a full-duplex relay system that minimizes outage probability. A relay system with the full-duplex relay can mitigate resource inefficiency of a half-duplex relay system. However, the mobile station suffers from the interference because the base station and the relay station transmits signal simultaneously to the mobile station. First, we suggest a layered broadcasting for full-duplex relaying. Second, we derive an optimal power allocation for the layered broadcasting in terms of the outage probability minimization. The proposed algorithm shows better performance than a half-duplex relaying system with and without the diversity, and a conventional full-duplex relaying system.

• Journal of Korean Society of Environmental Engineers
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• v.38 no.12
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• pp.676-682
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• 2016

In this study, rainwater-greywater hybrid system was installed and operated for 1 year in order to evaluate its water quantity, water quality, and economic efficiency in building no. 39. This system was expected to overcome each disadvantages of and maximize each advantages. Low-greywater that was washed up from shower room was treated by MBR (Membrane Bioreactor) and ozone oxidation. Rainwater that was collected from the rooftop was stored in a reservoir, and then transferred to the storage tank that was mixed with treated greywater. After 1 year operating in building no. 39, rainwater and greywater was used to supply $2,599m^3$ of toilet flushing water. In terms of water quality, rainwater was satisfied far the greywater reuse standards except for E.coli. Moreover, low greywater quality was acceptable except for E. coli, BOD, SS, and turbidity. In addition, economic analysis was obtained from benefit-cost ratio (B/C) with 1.11. It implies that the feasibility of the project was reasonable. Furthermore, various research and policy to improve the economic efficiency of water recycling facilities is required to expand the use of water recycling facilities.

• 월간낙농육우
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• v.29 no.7
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• pp.158-161
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• 2009

옥산목장은 자연순환형 낙동기반이 탄탄한 곳이다. 3만평의 조사료를 확보해 목장에서 밸생하는 가축분뇨를 전부 퇴비화해 환원하고 있으며 목장에서 발생하는 오수도 충분히 정화될 수 있는 시설을 갖췄다. 넓은 조사료포를 제 때 가꾸기 위해서는 관련 농기계도 확보해야 하고, 축분처리와 오수정화를 위한 설비 구축도 해야한다. 뿐만 아니라 목장을 경영하는 두 부부의 꾸준한 노력과 부지럼함도 담보돼야 한다.

• Journal of Wetlands Research
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• v.25 no.2
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• pp.91-98
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• 2023

Some concrete wastewater generated during construction is in the form of non-point pollution sources that workers, managers, and users are unaware of, and it is not easy to manage as it flows through sewage pipes. Due to these characteristics, construction sludge is inflow into rivers and sewage pipes in the form of non-point pollution sources in an unmanaged state. This study applied the D.W.S method to the concrete retaining wall removal method installed on the road, and the resulting concrete wastewater was physically and chemically treated through a mobile sewage treatment facility, and it was examined whether it met the removal efficiency and wastewater discharge acceptance standards. Accordingly, it is intended to meet the standards for effluent concentration of wastewater during construction by removing 73.5% of BOD and 89.1% of SS through physical and chemical treatment through portable sewage treatment facilities during construction. In addition, we would like to review the adequacy and economic analysis of calculating environmental conservation costs for physicochemical treatment through portable sewage treatment facilities and sewage treatment generated during construction.

• Journal of Korean Medical classics
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• v.19 no.1 s.32
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• pp.207-210
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• 2006

${\ulcorner}$상한잡병론(傷寒雜病論)${\lrcorner}$에 나오는 양허증의 병인병리(病因病理)에 대한 내용을 종합하여 검토하고, 그 처방의 구성 약물과 용약 규율에 대하여 살펴본 결과, 양허증을 치료하는 상용약물로는 부자 계지 건강 오수유 생강 등이 쓰였음을 알 수 있었다. 임상에서 약을 사용할 때에는 장부의 생리적 특징에 근거하여 약물을 배합하여야 좋은 효과를 얻을 수 있다. 예를 들어 심양허(心陽虛)에는 계지감초(桂枝甘草)에 복령(茯笭)을 배합하고, 신양허(腎陽虛)에는 진무탕(眞武湯) 신기환 등(等)에 복령(茯笭), 택사(澤瀉), 백출(白朮) 등의 약물을 배합하여, 비양허(脾陽虛)로 인한 담음(痰飮)에는 계지감초(桂枝甘草)의 신감(辛甘)한 약성으로 화양(化陽)하고, 복령(茯笭), 백출(白朮)로 건비리습(健脾利濕)하는 영계출감탕을 사용하며, 심하(心下)에 수(水)가 정체된 경우에는 윗 처방에 사인 백두구 등의 온건비위(溫健脾胃)하고 성비소식(醒脾消食)하는 약물을 가하여 사용한다. 폐양허(肺陽虛)하여 폐위가 된 경우에는 감초(甘草) 건강(乾姜) 등을 사용하여 온폐복기하는데, 이는 ‘배토생금(培土生金)’의 의미이다. 간양허(肝陽虛)가 나타나는 경우는 매우 드문데, 위기가 허한(虛寒)하여 간(肝)이 소설(疏泄)작용을 못할 때에는, 오수유(吳茱萸)로 온위산한(溫胃散寒)하고, 인삼(人參) 대조(大棗)로 보중익기하며, 오수유(吳茱萸) 생강(生姜)의 신산(辛散)작용으로 간기를 다스리는 오수유탕(吳茱萸湯)을 사용하여 강역지구(降逆止嘔)하며, 혼(魂)을 수렴하지 못하여 생긴 실안(失眼)에는 산조인탕(酸棗仁湯)으로 보간(補肝)하여 치료하며, 간경(肝經)에 한사(寒邪)가 침입하여 근맥이 연급(攣急)하게 된 경우에는 지주산(蜘蛛散)을 사용하여 온경산한(溫經散寒)한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.6A
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• pp.568-576
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• 2010

In this paper, we analyze the outage probability of full duplex relay (FDR) with decode-and-forward (DF) protocol is derived under fading channels. The fading channel for source-relay link is assumed to be Rician fading to consider the infrastructured fixed relay with line of sight (LOS) propagation, and the other fading channels are assumed to be Rayleigh fading. Based on this analytical result, we provide the criterion that FDR shows a lower outage probability than HDR to consider the interference problem and the resource efficiency improvement by full duplex (FD) operation. The accuracy of the analysis is confirmed throughout the simulation results.

• Journal of the Korean Wood Science and Technology
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• v.30 no.1
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• pp.34-39
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• 2002

This study examined the effect of carbonized wastewoods on purification of waste water. The purification ability of charcoals(lump-shaped, approximately 3×3×3 cm) maded by wood-based material for waste water from a kitchen and septic tank was superior to those of thinned wood. For lump-shaped charcoal, gaps between particles in particleboard, and gaps between fibers in MDF were much more effective than micropore in purification of waste water. After purification test, color of waste water from wood-based material charcoals were much more lighter than thinned wood charcoals. In addition, odors of waste water from both charcoals tended to be decreased.

• Journal of the Korea Organic Resources Recycling Association
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• v.28 no.2
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• pp.31-40
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• 2020

As private sewage treatment facilities in Korea are constantly concerned about the distribution and poor construction of defective products, minimum standards for each unit process applicable to the planning and design of sewage treatment facilities are deemed necessary. The problems and requirements of the analysis results of the operation status discussed in this study are as follows. 1) Strengthening education of supervisor of private sewage treatment facility. 2) Poor operation and management of Sewage treatment facilities. 3) A mandatory review of sewage treatment facilities for less than 2 ㎥/day of facilities other than sewage treatment zones. 4) Necessity of management of sewage treatment facility in feedstocks. 5) As a result of the technical review, Improvement plans for Ineligible facility are needed. It is also necessary to prepare a guidebook for design construction and maintenance by investigating and analyzing guidelines and data related to domestic and foreign private sewage treatment facilities.