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동해안 울진원전의 온배수 방출이 주변 해조군집에 미치는 영향
김영환,안중관,이재일,엄희문,Kim, Young-Hwan,Ahn, Jung-Kwan,Lee, Jae-Il,Eum, Hee-Moon 한국조류학회(藻類) 2004 ALGAE Vol.19 No.3
In order to clarify the structure and seasonal dynamics of warm tolerant benthic marine algal community in Korea, the species composition and biomass of marine algae at the discharge canal of Uljin nuclear power plant on the East Coast of Korea were investigated seasonally from February 1992 to October 2000. 107 species of marine algae were found at the discharge canal during the past nine years. In general, the number of species observed was abundant in spring or summer and less in autumn or winter. 27 species (4 blue-green, 5 green, 6 brown and 12 red algae) of marine algae occurred more than 1/ 6 frequency and thus can be categorized as warm tolerant species. Among these, one brown (Dictyota dichotoma) and four red algae (Gelidium amansii, Anphiroa ephedraea, Hydrolithon sargassi, Marginisporum crassissimum) are recorded as warm tolerant marine algae for the first time in Korea. Padina arborescens, Anphiroa zonata and Corallina pilulifera were common species found more than 75% frequency. Seasonal fluctuations of mean biomass were 0-1,330 g dry wt m^(-2) and dominant species in biomass were Corallina pilulifera (contribution to a total biomass proportion 34%), Anphiroa zonata (23%), Padina arborescens (18%) and Sargassum micracanthum (11%). The red algae appeared as predominant algal group at the discharge canal of Uljin nuclear power plant in the qualitative and quantitative aspects. The green algae such as Enterornorpha compressa appeared rather frequently at the discharge canal, but the biomass proportion was very low, in contrast to Kori nuclear power plant where there was definite green algal dominance. Differences in algal communities developed at the discharge canals of Uljin and Kori nuclear power plant on the East Coast of Korea, particularly biomass proportions of green algae, can probably be related to local environmental factors such as water velocity through the canal and natural seawater temperatures.
김용진(Yong Jin Kim),홍원석(Won-Seok Hong),정상현(Sang-Hyoun Jeong),송영훈(Young-Hoon Song),엄희문(Hee-Moon Eum),장경룡(Kyoung-Ryong Chang),박태성(Tae-Sung Park),심재구(Jae-Gu Shim),한영욱(Young-Uk Han) 대한기계학회 2001 대한기계학회 춘추학술대회 Vol.2001 No.3
Non-thermal plasma can be used to promote chemical reactions to reduce the emission of gaseous pollutants. With such a technique, oxidizing radicals such as OH, HO₂ and O are produced and the reaction of SO₂ and NOx with radicals yield several acids that can be neutralized by injecting ammonia into the gas; the final products, being aerosol particles, can be removed from the flue gas in a particle collector. The size distribution of particulates formed by non-thermal pulsed plasma DeSOx-DeNOx process is analyzed. Experimental studies of particle collection are carried out using fibrous filter and electrostatic precipitator.
박태성,엄희문,김경숙,양석란,장경룡 한국화학공학회 2001 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.39 No.3
플라즈마 공정에 의해 생성된 부산물의 비료로써의 활용성 및 첨가제의 필요성과 냉각수등 공정에 필요한 자료를 확보하고자 반응기 하단에 연결된 반응부산물 tank, 반응기 내부 및 반응기 후단에서 시료를 채취하여 분석하였다. 먼저 반응부산물 tank에서 액체상태로 채취한 시료의 경우, SO₄^(2-) 〉NO₃^- 〉NH₄^+ 으로 관찰되었다. 반면에 반응기에 설치된 냉각수를 사용하지 않고 펄스를 인가하여 짧은 시간내에 실험한 후 반응기 내부(반응전극)에서 채취한 시료의 경우, 염화암모늄이 주생성물로 확인되었다. 한편 반응기 후단에서 고체 상태로 채취한 시료의 경우에는 흡습성이 강한 질산암모늄보다는 황산암모늄이 주생성물이므로 부산물을 포집하는데 bag filter도 유용하게 사용될 수 있을 것으로 예상되었다. The samples from 3 different spots were analyzed to get information about the necessities of additives, the needs of cooling water, and the utilities of byproducts as an agricultural fertilizer. First, the liquid sample gathered from the bottom of reactor was showed SO₄^(2-) 〉NO₃^- 〉NH₄^+. Second, the solid sample collected from reactor inside was identified ammonium chloride came from HCl of the exhausted gas. Third, the solid sample stacked in the exhausted plumbing was indicated as a very high ratios of sulfate/nitrate, therefore, a bag filter can be used as a collecting device of byproducts.
발전소 냉각탑 시스템에서의 High C. O. C. 운전에 대한 연구
박광규,엄희문,문전수,박필양 한국공업화학회 2001 응용화학 Vol.5 No.2
Common chemical treatment programs have been developed through pilot tests and field application tests for the high cycles of concentration (C.O.C.) operation in cooling tower systems of combined thermal power plants. The application of common chemical treatment programs, optimized for the high cycle operation, could save the make-up water of about 25,000 ton/day and reduce the inhibitor chemical cost significantly in the cooling tower systems of combined thermal power plants.