안료제조공정시 배출되는 염화알루미늄 용액의 재활용에 관한 연구

한승우(Sung-Woo Han),이헌모(Heon-Mo Lee),윤종호(Jong-Ho Youn),정병곤(Byung-Gon Jeong),양병수(Byung-Soo Yang) 군산대학교 수산과학연구소 2004 군산대학교 수산과학연구소 연구논문집 Vol.3 No.-

제품화시킨 염화알루미늄(AlCl₃) 용액과 현재 각 처리장에서 사용하고 있는 무기응집제(PAC. Alum)를 약품교반실험(Jar-test)을 통하여 응집효율을 비교하여 염화알루미늄(AlCl₃)용액에 대한 재활용 가치를 검토한 결론은 다음과 같다. 1. 안료제조 공정에서 배출되는 리 제거효율이 99.8% 이상으로 나타나 구리 (Cu) 성분 제거에 효과적인 것으로 나타났다. 2. 제품화 시킨 염화알루미늄 (AlCl₃) 용액파 우기응집제인 PAC(10%), Alum(8%) 파의 응 집실험에서 염색폐수 및 화학폐수에 대해서는 염화암루미늄(AlCl₃) 응집제가 PAC (10% ), 비하여 응집효율이 높게 나타났고, 피혁폐수의 경우 Alum(8%) 이 다소 폐수의 종류에 따라셔 응집효율이 다르게 나타나는 것으로 평가되었으나 비교적 염화암루미늄(AlCl₃) 응집제의 응접효율이 우수한 것으로 나타났다. 3, 제품화 사킨 염화암루미늄(AlCl₃) 응집제의 응집특성 실험결과 응집제 주입량 500 - 1,500mg/l 의 범위에서 주입량의 증가로 응집효율이 다소 증가하는 경향을 보이나 그 영향은 미미하였으며 동일 주입량에서 pH 변화에 따른 응집효율차이는 폐수의 종류에 따라서 다르게 나타나 폐수 성상에 따라 응집제 주입량 및 적절한 pH 를 선정하므로서 응집효율을 높일 수 있을 것으로 평가되였다. With the comparision of coagulation efficiency through Jar- Test with the producted AlCl₃ solution and inorganic coagulants - PAC, Alum - which are using at the each wastewater treatment plant, the reuse value for AlCl₃ solution are concluded as follows: 1. The removal efficiency of copper in solution was higher than 99.8 % when the aluminum pieCes were added and reacted in the AlCl₃ solution from the pigment production process. Therefore, the AlCl₃ solution was effective to remove copper. 2. From the coagulation expcr'iments with the producted AlCl₃ solution and inorganic coagulants - PAC (10%), Alum (8%) - the coagulation efficiency of AlCl₃ was higher than that of inorganic coagulants - PAC (10%), Alum (8%) - for a dye and chemical plant wastewater. Wherease, Alum (8%) showed somewhat higher coagulation efficiency than that of AlCl₃ for a leather plant wastewater. It was evaluated that the coagulation efficiency depended on the kinds of wastewater. However, in general, the coagulation efficiency of AlCl₃ was superior to inorganic coagulants - PAC (10%), Alum (8%). 3. The coagulation efficiency tended to be increased with the increase of coagulant in the range of 500 - 1,500 (mg/l) from the characteristic experiment of producted AlCl₃ coagulant. hut the effect was insignificant. 4. Since the coagulation efficiency by the variety of pH at the same dosage was different at the different kinds of wasterwater. Therefore, it was conculded that the coagulation efficiency could be increased by the proper pH and coagulant dosage with the characteristic of wastewater.

연료 분사시기가 디젤기관의 성능에 미치는 영향

임재근(J. K. Lim),최순열(S. Y. Choi) 군산대학교 수산과학연구소 2004 군산대학교 수산과학연구소 연구논문집 Vol.4 No.-

A study on the combustion and exhaust emissions (Soot & NOx) of diesel engine with various fuel injection timing is performed experimentally. In this paper, fuel injection timing is changed from BTDC 20˚ to 14˚ at 2˚ intervals, the experiments are performed at engine speed 1800rpm and from load 25% to 100% at 25% intervals. and main measured parameters are cylinder pressure, rate of pressure rise, fuel consumption rate, Soot and NOx emissions etc. The obtained conclusions are as follows (1) Cylinder maximum pressure is increased with leading fuel injection timing. (2) Specific fuel consumption is indicated the least value at BTDC 18˚ of fuel injection timing. (3) Sact emission is decreased with leading fuel injection timing. (4) NOx emission is increased with leading fuel injection timing.

저압증발형 조수기 개발에 관한 연구

최순열(S. Y. Choe) 군산대학교 수산과학연구소 2004 군산대학교 수산과학연구소 연구논문집 Vol.5 No.-

Accelerated industry development and urbanization during the last three decades have led serious water pollution problems in many parts of the nation. Especially, in region of west and south coast have low fresh water in the dry season of spring and summer. In the place isolated from land, it is important to secure the fresh water for drinking and general service. This study is concerned on the development to low-pressure evaporation type fresh water generator of capacity Hon/day by non-operating boiler in the season of summer. The results obtained from this study are as follows. The maximum production quantity was 1.1ton/day at pressure 40mmHg abs. and temperature 80℃. The water quality showed good coincidence with the calculated values.

메기(Parasilurus asotus)의 部位別 脂肪質成分의 分布

최진호(Jin-Ho Choi),박시향(Si-Hyang Park),노재일(Jae-Il Ro),변재형(Jae-Hyeung Pyeun),최선남(Sun-Nam Choe) 군산대학교 수산과학연구소 1994 군산대학교 수산과학연구소 연구논문집 Vol.1 No.-

This study was designed to elucidate the lipid and its fatty acid composition in various tissues of cat fish. Parasilurus asotus. The free lipid contents in meat, skin and viscera were 5.62%, 26.34% and 19.27%, Whereas the bound lipid contents in those tissues were 2.34%, 2.30% and 19.27%, respectively. The neutral lipid contents in free lipid were 5 times higher than those in bound lipid. while the phospholipid contents in bound lipid were 4 times higher than in free lipid. The neutral lipid was mainly composed of triglyceride (79.84%-99.86%) in free lipid, and esterified sterol & hydrocarbon(55.12-64.33%) in bound lipid. The phospholipid was mainly composed at phosphatidyl choline(52.38-69.98%) and phosphatidyl ethanolamine (24.09-40.48%) in free lipid, and phosphatidyl choline (53.03-58.54%) and phosphatidyl ethamolamine(13.80-19.23%) in bound lipid. The major fatty acids of polar lipid in tree and bound lipids were CI6:0(28.37%, 21.99%). CI8:1(12.01%, 11.52%). C18:2 (17.93%, 14.12%) and C22:6 (17.22%, 20.63%), and those of nonpolar lipid in free and bound lipids were C16:0(14.81%, 18.94%). C18:1(25.93%, 10.89%) and C22:6 (9.95%, 23.44%), respectively. The total essential fatty acid(TEFA) content in skin was slightly higher than that in meat. In both polar and nonpolar lipids in meat w3-HUFA contents of polar lipid were 1.5-2.0 times higher than nonpolar lipid and also w3-HUFA content of bound lipid was slightly higher than that of free lipid. There were significant differences in the lipid classification and its fatty acid composition between free and bound lipids and/or in various tissues.

西海岸의 水産業에 관한 史的考察(Ⅲ)-光復이후 혼란기에 있어서 古群山 郡島와 그 隣接地域을 中心으로-

이길래(Lee Kil-Rae) 군산대학교 수산과학연구소 2004 군산대학교 수산과학연구소 연구논문집 Vol.4 No.-

Since the liberty From Japanese dictatorship in 1945, I have reseached historical fisheries aspect at the KoKunSan Id and it adjacent area an the cofused era till Fisheries cooperations has been carried out in 1962. In case of Fishing industry, it similar to the Fishing Gear, fishing method in used Japanese domination erea. The Fishery industry was very small business. The main Fishing industry was stow netter 15 more or less, the long liner, one pole angling were accomplished in the coastal sea. The major species in the early of 1950 years, corvenia, hairtail flat fish. but compare to the 1953, corveniar hair tail was decreased 2.2 times, 2.6 times respectively. The white fish which was caught 7.7 times in 1957 at Geum river ertuary were disappeared in 1960. In relation with Fishing aqua culture, oyster, seaweed, short necked clam were carried out experimental business but the oyster, short necked clam were successive but seaweed has been faired. In case of Fisheries manufactures, it had been produced dried (hairtail, corvenia, etc.) salted, (hairtail, pomfret, horse mackerel, corvenia, ete.) The base of Fisheries marketing were Gunsan, chang hang, BoRyong, KanKyung Fishery cooperating at the center of Gum river.

군산 지역에서 Loran C Korea Chain (GRI 9930)의 측위정도 연구

이원우(Won-Woo Lee) 군산대학교 수산과학연구소 2004 군산대학교 수산과학연구소 연구논문집 Vol.4 No.-

The Loran C position accuracy is not excellent but the repeatable and relative accuracy is very good, and it is very useful for fishing vessel in coastal waters. The operation of Korea chain(GRl 9930) was begun on January, 1996, and in order to evaluate the accuracy of this chain, it was observed with Loran C receiver (LC-90, Furuno) in June 26, 1997 at the fixed position of Kunsan national university. The obtained results were as follows; The time difference error of M-W, M-X, M-Y pair were 1.29 ㎲, 0.13 ㎲, 2.07㎲ respectively and the mean time differences of M-W, M-X, M-Y pair were 11495.51 ㎲, 28262.33 ㎲, 43150.21 ㎲ respectively. And the mean position error of W-X, W-Y, X-Y were about 859 m, 560 m, 612 m respectively

推測航法과 Loran C航法을 結合한 Hybrid航法의 精度

이원우(Won-Woo LEE),신형일(Hyeong-Il SIN) 군산대학교 수산과학연구소 1994 군산대학교 수산과학연구소 연구논문집 Vol.1 No.-

Recently, Hybrid Navigation Systems combining Omega, NNSS, Loran C and Dead reckoning etc. served to give us highly accurate ship's position, and a number of ships are equipped with these navigation systems. In order to evaluate for the accuracy of this navigation system observations of Loran C, 5970 and 9970 chains and Radar at the same time were made on board m.s "Jeonbuk 401 and 403" training ships of Gunsan Fisheries Collage at nine stations in the yellow sea from July, 1982 to June, 1983, and then were done bV the Hybrid Navigation System combining Dead reckoning and Loran C at the same areas. The authors investigated the accuracy of the Hybrid Navigation System based on measurements of the relative positional error which is defined as the difference between the position fixed by this svstem or the Loran C system, and the one by the Radar. The obtained results are as follows; 1. The mean standard deviation of the time difference of Loran C were about 0.21μs in 9970 chain and about O.O3μs in 5970 chain, and the fluctuation of the time difference of Loran C in 5970 chain was smaller than that in 9970 chain. 2. The positional error between two positions by Radar and the Hybrid Navigation System in 9970 chain was about 0.4 miles, and between two positions by Radar and Loran C was about 0.51 miles. The Hybrid Navigation System was therefore more accurate than Loran C System. 3. The positional error between two positions by Radar and Hybrid Navigation Systyem in 5970 chain was about 0.4 miles, and between two positions by Radar and computer simulation of Loran C was about 0.98 miles. Consequently, Hybrid Navigation System was more accurate than computer simulation of Loran C system.

공구마멸에 따른 절삭력의 RMS 특성

권용기(Yong-Ki Kwon),오석형(Seok-Hyung Oh),김동현(Dong-Hyun Kim) 군산대학교 수산과학연구소 1994 군산대학교 수산과학연구소 연구논문집 Vol.2 No.-

With the use of the NC machine tool, the unmanned production system bas been growing recently in the manufacturing field. Thus there are problems with monitoring adequate tool fracture during the cutting process efficiently. This study was planned and carried out to discover a way of monitoring tool condition in ON-LINE systems during the cutting process. The acquisition of data in cutting force and tool wear has been made in the section examined, to extract the RMS value of the cutting force as specific factors in the cutting process. The fluctuation of the cutting force in accordance with tool wear has been analysed by using experimental data as the RMS characteristics. From the results, it has been shown that the fluctuation of the RMS values for the cutting force has a close relation to flank wear.

한국산 메기(Silurus asotus)의 질병에 관한 연구 Ⅱ. 비브리오병에 관하여

김영길(Kim Young Gill),이근광(Keun Kwang Lee) 군산대학교 수산과학연구소 1994 군산대학교 수산과학연구소 연구논문집 Vol.2 No.-

발병한 양식 메기로부터 vibrio속 균주를 분리하였다. 분리된 균주는 생물학적 생화화적 특성에 기초하여 동정한결과 V.ordalii로 동정되었다. 분리균은 glucose, lactose, maltose와 salicine으로부터 산을 생산하였으며, arabinose, galactose, inocitol과 xylose는 이용하지 못하였다. 분리된 V.ordalii를 각각 KL-1, KL-2라 명명하였다. KL-1과 KL-2는 생리학적 특성이 유사하였다. 즉, pH 5-10, NaCl 0%-6.0%에서 발육하였으며, 또한 NaCl 7.0%, pH 10이상 그리고 pH5이하에서는 발육하지 않았다. KL-1균주를 건강한 메기에 인공 감염시킨 결과 양식장에서 발병된 증상과 동일한 출혈성 궤양이 유발되었다. 감염 24시간 후에 나타난 붉은 반점은 접종 부위 주변에서부터 확장되기 시작했으며, 감염 120시간 후부터는 배지느러미 부위까지 궤양이 확장되었다. 각각 온도에 따른 실험에서는 25℃에서 폐사율이 70% 로 나타났다. 약제 감수성 시험에서 KL-1과 KL-2 균주는 모두 GM, K, N, S와 SxT에 감수성을 나타내었으나, CF 및 L₂와 VA에는 저항성을 나타내었다. Two vibrio sp. strains were isolated from disease catfish(Silurus asotus). The present isolates were identified as Vibrio ordalii based on their biological and biochemical characteristics: they were positive for acid production from glucose, lactose, maltose, sucrose and salicine, while negative for arabinose, galactose, inocitol and xylose. They are named KL-1 and KL-2. KL-1 and KL-2 strains were similar to physiological characteristics : growth was observed at pH 5 to 10 and in 0% to 6.0% NaCl. Two strains did not growth at a concentration above 7.0% NaCl and pHIO. This bacterium was injected into health catfish hypodermically. Such injection was found 10 induce haemorrhagie ulcers very similar to those observed in naturally infected fish. At 24h post-infection, the red spot developed around the injection site and grew bigger to from a red Sport area. At 120h post-infection, the muscle ncerosis was extended near the ventral fin. The seventy percent lethal dosage was appeared to water temperature at 25℃. Two strains were tested for drug senistiveity by plate method. KL-l and KL-2 strains were sensitive to GM. K. N. S and SxT, but resistant to CF. L₂and VA.

동죽의 칼로리 함량에 대한 계절 변화

이정열(Jeong-Yeol LEE) 군산대학교 수산과학연구소 2004 군산대학교 수산과학연구소 연구논문집 Vol.3 No.-

Seasonal changes in calorific content of surfclam, Mactra veneriformis collected from kunsan areas was measured in 1994. The amounts of feces from surfcalm was high from spring to fall according to temperature rising. Variation of calorific contents in feces was varied by month. but was high in June for 3cm group and in September for 2cm group in general. And it was also showed low in February~March and August. The difference between two groups was higher 1.7times in 3cm group than in 2cm group. The variation of calorific contents in carcass and viscera of surfciam was similar to those of feces, but the difference by size was not appeared. The energy used for respiration was high in summer and low in winter. The calorific contents of shell was low in February and after June. About 60.4~60.6% of total energy lossed for feces, so that the assimilation rate was 39.4~39.6%. It was presumed that the spawning period is between June and August. and the annual ring formation is between February and March.