• Title/Summary/Keyword: Marine Discharge

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Characterization of Acid-soluble Collagen from Alaska Pollock Surimi Processing By-products (Refiner Discharge)

  • Park, Chan-Ho;Lee, Jae-Hyoung;Kang, Kyung-Tae;Park, Jae-W.;Kim, Jin-Soo
    • Food Science and Biotechnology
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    • v.16 no.4
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    • pp.549-556
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    • 2007
  • The study was carried out to examine on the refiner discharge from Alaska pollock as a collagen resource by characterizing biochemical and functional properties of collagen. The refiner discharge from Alaska pollock surimi manufacturing was a good resource for collagen extraction according to the results of total protein, heavy metal, volatile basic nitrogen, collagen content, amino acid composition, and thermal denaturation temperature (TDT). TDT of acid soluble collagen from refiner discharge showed $20.7^{\circ}C$, which was similar to that of collagen from Alaska pollock muscle and was higher than that of collagen from Alaska pollock skin. TDT of acid-soluble collagen from refiner discharge was, however, lower than those of skin collagens from warm fish and land animal. Acid-soluble collagen from refiner discharge of Alaska pollock could be used as a functional ingredient for food and industrial applications according to the results of water and oil absorption capacities, and emulsion properties. In addition, if the thermal stability of the acid-soluble collagens is improved, collagen from refiner discharge from Alaska pollock could be more effectively used.

Diffusion Modelling of Cold Discharge on Coastal waters (연안역의 냉배수 확산모델링)

  • Kim, Jong-Kyu;Kim, Jong-Hwa
    • Journal of Fisheries and Marine Sciences Education
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    • v.13 no.2
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    • pp.132-145
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    • 2001
  • The cold discharge from LNG(liquefied natural gas) terminal makes the water temperature around the terminal fall down. This temperature reduction may result in serious changes on marine ecosystem of the coastal area. The numerical model experiments of material transport and tidal circulation in the inner bay, Chinhae Bay are investigated in the dispersion of cold discharge from LNG terminal. The condition of ambient water is exposed to tide, tidal current and cold discharge temperature. Simple numerical model experiments highlight the importance of tidal circulation and cold discharge at each case and some results are discussed. The results of this study can be used as the guideline for the site selection of LNG terminals and long-term marine environmental impact assessment.

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Ecological Characteristics of Marine Algal Communities at the Discharge Canals of Three Nuclear Power Plants on the East Coast of Korea (동해안 3개 원전 배수로 해조군집의 생태적 특성)

  • Kim, Young-Hwan;Ahn, Jung-Kwan
    • ALGAE
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    • v.20 no.3
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    • pp.217-224
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    • 2005
  • The species composition and biomass of marine algae at the discharge canals of three (Gori, Wolseong and Uljin) nuclear power plants on the east coast of Korea were investigated seasonally from February 1992 to October 2000. As a result, 103-107 species of marine algae were found at the discharge canals during the past nine years. In general, algal communities established at the discharge canals were less diverse than those at the intake canals and control sites. 43 species (6 blue-green, 9 green, 10 brown and 18 red algae) of marine algae occurred more than 1/6 frequency and thus can be categorized as warm tolerant species. Among these, two green (Urospora penicilliformis, Cladophora albida), four brown (Sphacelaria divaricata, S. rigidula, Sargassum coreanum, S. fulvellum) and four red algae (Stylonema alsidii, Bangia atropurpurea, Hypnea charoides, Chondria crassicaulis) are recorded as warm tolerant marine algae for the first time in Korea during this study. Enteromorpha compressa, Padina arborescens, Amphiroa zonata and Ahnfeltiopsis flabelliformis were common species found more than 50% frequency at the discharge canals of all three nuclear power plants investigated. Dominant species in biomass were Padina arborescens and Amphiroa zonata. Results showed that, as a whole, the red algae appeared as predominant algal group at the discharge canals of all three nuclear power plants on the east coast of Korea. However, the biomass proportion of dominant algae at the discharge canals of each nuclear power plant varied over the year during the past nine years.

Effects of Light, Desiccation and Salinity for the Spore Discharge of Gracilaria verrucosa (Rhodophyta) in Korea

  • Kim Young Sik;Choi Han Gil;Nam Ki Wan
    • Fisheries and Aquatic Sciences
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    • v.4 no.4
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    • pp.257-260
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    • 2001
  • The effects of light, desiccation and salinity on the discharge of spores in Korean agarophyte, Gracilaria verrucosa were studied. Among the examined factors, light after darkness was the most effective for spore discharge. The maximum release of tetraspores was induced at 24 h after the treatment. Desiccation also seems to be conductive to the release of tetraspores. However, its effect, as in treatment of distilled water for salinity, was hardly found in induction of carpospore discharge. This may suggest that spore discharge in this alga is primarily related with photoperiodic rhythm. Also it appears that the amount of light energy received by fertile thalli also significantly affects to the spore release, considering relationship between the amount of the discharged spores and the elapsed time after treatment.

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Performance Analysis on the Ejector System in Flue-gas Discharge Channel of Marine Incinerator (소각기의 배기가스 유로에 이젝터를 적용한 시스템의 성능 분석)

  • Yun, Sang-Kook;Chang, Ho-Gil
    • Journal of Advanced Marine Engineering and Technology
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    • v.35 no.6
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    • pp.773-778
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    • 2011
  • The International Maritime Organization(IMO) could try to adopt more severe amendment to prevent any air pollution from various waste materials by marine incinerator. This study is to analyse the performance improvement through Ansys CFD about new invented system which has three flue-gas discharge channels and sub-ejector installed in the dischage channel in order to evacuate flue-gas well from the combustion chamber. The results showed that the discharge temperature of flue-gas was below the regulated value of IMO by the multi-channels, and the sub-ejector system installed in the discharge channel was highly effective one to improve the flue-gas discharge ability.

Marine Algal Flora and Community Structure of the Intertidal Zone around Shingori Nuclear Power Plant, Korea (신고리원자력발전소 주변 해역 조간대의 해조상 및 군집구조)

  • Han, Su Jin;Jang, Jae Gil;Hwang, Youg Hun;Son, Min Ho;Choi, Han Gil
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.50 no.3
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    • pp.319-325
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    • 2017
  • Marine algal flora and community structures were examined seasonally at three sites around the Shingori Nuclear Power Plant, Korea from February to November 2016. A total of 76 species were identified, including 9 green, 14 brown and 53 red algae. The greatest number of species occurred at Daesongri (51 species) followed by Sinamri (43 species) and at the discharge area (38 species) during the study period. Of the 76 seaweeds, 59 annuals and 17 warm tolerant species were recorded. Annual average biomass in dry weight varied from $168.02g/m^2$ at the discharge area to $222.53g/m^2$ at Sinamri. The coarsely branched form was the dominant functional form of seaweeds at the three sites. Seaweed community structures at the discharge site were distinguishable by decreasing species richness, biomass, species diversity index, richness index, and evenness index. The ratio of warm tolerance species and the dominance index values were remarkably higher at the discharge than those at the other sites.

Difference in Macrobenthic Community Structures at Thermal Effluent Discharge Areas of Two Nuclear Power Plants in Korea (원자력발전소의 온배수 배출해역에서 대형 저서동물 군집구조의 차이)

  • Maeng, Jun-Ho;Kim, Keun-Yong;Kim, Young Ryun;Shon, Myung Baek;Kim, Jin Hee;Son, Min Ho
    • Journal of the Korean Society for Marine Environment & Energy
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    • v.18 no.3
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    • pp.157-165
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    • 2015
  • This study investigated and compared sediment properties and macrobenthic community structures within heated effluent plumes at the discharge areas of Kori Nuclear Power Plant (KNPP) and Sinkori Nuclear Power Plant (SNPP) in Korea, which have different thermal effluent discharge systems. There were significant differences in sand, clay and organic carbon contents between sediments at the two discharge areas. Species richness and abundance of macrobenthos were higher at the SNPP discharge area than at that of the KNPP, although the values at both areas were comparable to previous studies in coastal areas of eastern Korea.

A Study on the Gap Voltage and Machining Stability in Diesinking Electrical Discharge Machining (형조 방전가공에서 극간 전압과 가공 안정성에 관한 연구)

  • 김광열;이상민;이건기
    • Journal of Advanced Marine Engineering and Technology
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    • v.27 no.3
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    • pp.429-436
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    • 2003
  • The electrical discharge machining(EDM) with Si electrode instead of Gr or Cu electrode. made enormous effects on the surface. machining time, anti-caustic workpiece surface and so on In this paper. we experimented on the inter-role distance during discharge the electrical phenomenon of inter-pole, the distribution of discharge point. the distribution of off load time. etc., using Si electrode Cu electrode and Gr electrode under the same machining condition. As a result of a large quantity generated exclusive powders. the performance of the EDM using Si electrode. compared with EDM using others. is improved. We show that the quantities of those make far pole-gap discharge and discharge scatter under stable machining status possible.

The Study on the Marine Eco-toxicity and Environmental Risk of Treated Discharge Water from Ballast Water Management System using Plasma and MPUV (Plasma와 MPUV를 이용한 평형수관리장치의 배출수에 대한 해양생태독성 및 해양환경위해성에 관한 연구)

  • Shon, M.B.;Son, M.H;Lee, J.;Lee, S.U.;Lee, J.D.;Moon, C.H.;Kim, Y.S.
    • Journal of the Korean Society for Marine Environment & Energy
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    • v.15 no.4
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    • pp.281-291
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    • 2012
  • In this study, WET (whole effluent toxicity) test with Skeletonema costatum, Tigriopus japonicus and Paralichthys olivaceus and ERA (environmental risk assessment) were conducted to assess the unacceptable effect on marine ecosystem by emitting the treated discharge water from 'ARA Plasma BWTS' BWMS (ballast water management system) using filtration, Plasma and MPUV module. 34 psu treated discharge water from ARA Plasma BWTS shown slight chronic toxicity effect on the P. olivaceus ($7d-LC_{50}{\Rightarrow}100.00%$ treated discharge water, $7d-LC_{25}{\Rightarrow}85.15%$ treated discharge water). Bromobenzene, chlorobenzene and 4-chlorotoluene in 34 psu treated discharge water from ARA Plasma BWTS were higher than in the background original content of seawater. The PECs (predictive environmental concentrations) of bromobenzene, chlorobenzene and 4-chlorotoluene calculated by MAMPEC (marine antifoulant model to predict environmental concentrations) program (ver. 3.0) were 3.34E-03, 2.10E-03 and 1.73E-03 ${\mu}g\;L^{-1}$, respectively and PNECs (predicted no effect concentrations) of them were 1.6, 0.5 and 1.9 ${\mu}g\;L^{-1}$. The PEC/PNEC ratio of bromobenzene, chlorobenzene and 4-chlorotoluene did not exceed one and 3 substances did not consider as persistence, bioaccumulative and toxic. Therefore, it was suggested that treated discharge water from ARA Plasma BWTS did not pose unacceptable effect on marine ecosystem.