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불활성계와 할로카본계 복합 소화약제 및 소화시스템 개발
최근주(Choi, Keun-Joo),안상수(Ahn, Sang-Soo),김종원(Kim, Jong-Won),정종진(Jung, Jong-Jin) 한국화재소방학회 2009 한국화재소방학회 학술대회 논문집 Vol.2009 No.춘계
A compound agent that mixes inert gas agents and halocarbon agents and a complex fire suppression system using the compound agent have been developed. The ultimate goal of this study is to develop the extinguishing agent which doesn't destroy the ozone layer and has low GWP and to develop the fire suppression system. As a result of the test and research for inert gas agents and halocarbon agents, nitrogen and FK-5-1-12 were selected finally and have been tested and studies for three years. Thus, the optimal extinguishing agent and fire suppression system have been accomplished. The performance of the agent and system was tested according to KFI performance test technical standards for gas fire extinguishing system and the fitness of the agent and system for a fire was certified by Korea Fire Industry Technology Institute (KFI).
최근주(Keun Joo Choi),김상구(Sang Goo Kim),손희종(Hee Jong Son),류동춘(Dong Choon Ryu),류재익(Jae Ick Ryoo),손인식(In Sik Son) 한국물환경학회 2002 한국물환경학회지 Vol.18 No.1
Japan Environmental Agency announced 14 kinds of endocrine disruptors was detected on 130 watersheds of Japan in 1998 and the Ministry of Environment of Korea announced 13 kinds of endocrine disruptors involving Bisphenol-A was detected in domestic watersheds in 2000. According to the report, bisphenol-A, nonyiphenol and 4-n-heptylphenol were detected in all domestic watersheds. This study was carried out for finding removal method of 13 species of endocrine disruptors on water treatment processes. The concentrations of prepared endocrine disruptors standard water were about 10 ㎎/L and we analyzed the concentration of endocrine disruptors by W Absorbance. All 13 pieces of endocrine disruptors could be absorbed into the powder activated carbon(PAC) and the phthalates(DBP, DEP, DEHP) could be coagulated but other endocrine disruptors could not be coagulated by coagulant. Ozonation showed that it could not remove endocrine disruptors by measuring W Absorbance, but other researchers reported ozonation could transfered endocrine disruptors to isomer.
최근주 ( Keun Joo Choi ),김상구 ( Sang Goo Kim ),노재순 ( Jae Soon Roh ),손희종 ( Hee Jong Son ),권기원 ( Ki Won Kwon ),신판세 ( Pan Se Shin ) 한국수처리학회 2004 한국수처리학회지 Vol.12 No.3
N/A We have studied removal efficiency of three endocrine disruptors (Amitrol, Nonylphenol, Bisphenol-A) by oxidation, coagulation and adsorption processes by activated carbon (including the used carbons). Ozonation and chlorination can oxidate nonylphenol, bisphenol-A and the more dose of powder activated carbon(PAC) the more removal efficiency. Coal Based carbon had more adsorption capacity of amitrol, nonylphenol and bisphenol-A than other two carbons on isotherm test, next was wood based carbon for nonylphenol, and coconut based carbon for bisphenol-A. Used coal and coconut based carbon had higher removal efficiency for amitrol than virgin carbon with service time. Three virgin carbons had 0-20% adsorption efficiency and the used carbons had 79-90% biodegradibility for amitrol. It was showing that hydrophilic material can be removed by biodegradation. The hydrophobic materials like as nonylphenol and bisphenol-A were effectively adsorbed onto all carbons tested in this study. The adsorption capacity reduced with the operation year, and the extent of the reduction was different depending upon the carbon type and the operation year. The adsorption parameters for nonylphenol and bisphenol-A provided by this study could be valuable when GAC adsorption was considered to handle an accidental spill of nonylphenol and bisphenol-A.
김상구(Sang Goo Kim),최근주(Keun Joo Choi),오형석(Hyeong Seok Oh),노재순(Jai Soon Noh),황영도(Young Do Hwang),박은주(Eun Ju Park),손희종(Hee Jong Son),신판세(Pan Se Shin) 한국수처리학회 2002 한국수처리학회지 Vol.10 No.3
N/A Coagulation and filtration are basic treatment processes in rapid filtration system. Good performance of coagulation process can produce high quality of filtered water which is lower turbidity and particles water. Many factors which effect to coagulation are introduced by many studies but these results of studies are almost impossible to adjust to constructed water treatment processes. Therefore optimum design is very important for producing required water quality. We have researched variations of filtered water quality by coagulation conditions after back wash with filtration time. The most effective factor for a good coagulation is coagulant dose however inject point of coagulant had no effect to producing good filtered water and the lower mixing energy produced good filtered water than higher mixing energy. The period of direct filter`s maturing after coagulant dose is within ten minutes, it will be good indicator for a good coagulant dose. Long time of only air scour did not need to detach floc from filter media because floc detaching occurred not air scour alone but high rate of up flow water by air pressure, after the water in the underdrain moved to the surface of filter by air pressure, the turburance of filter media is stopped. Longer air scour did not effected to media disturbing, so for more achieve effectiveness of air scour, reair scour should be carried out after refill the back wash water in the space of underdrain.