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전의찬,이성기 조선대학교 환경연구소 1991 環境公害硏究 Vol.8 No.-
Recently, a number of high-rise buildings have been constructed in big cities such as Seoul. The air pollution levels at these buildings are expected to be generally different from those at the ground level. The purpose of this study is to show the vertical distribution of nitrogen dioxide(NO_(2)) in Seoul City. The concentration of NO_(2) with height were measured at the Korea Exhibition(KOEX) building(54 stories), one of the new high storied buildings. At the same time, the vertical variation of the temperature were measured and the effect of the atmospheric stability on the vertical distribution of air pollutants was analyzed. The result are as follows; 1) In the morning. the minimum concentration was found at 50m above the ground, and the maximum value at the ground level and 110m above the ground. In the afternoon, the minimum value was found at 110m above the ground, and the maximum value at 50m above the ground. At night, the minimum value was found at 50m above the ground, and the maximum value at 160m above the ground. 2) The minimum value of daily average concentration was found at 50m above the ground, and the maximum value at the ground level and 160m above the ground. 3) The daily variation of air pollution concentration turned out to have a close relationship with the atmospheric stability. The NO_(2) concentration was higher in the morning exceeding the long-term air quality standard.
이성기(Seong Key Lee),송영일(Young Il Song) 한국수처리학회 1996 한국수처리학회지 Vol.4 No.2
The effects of anaerobic conditions on Biological Phosphorus Removal and sludge settleability in Anaerobic-Oxic(AO) Process have been studied. Ten systems with different anaerobic configurations and various anaerobic retention time were operated. It has been observed that the growth of some filamentous organisms was suppressed under three-compartment anaerobic cascades as results of more soluble COD reduction and substrate gradient in anaerobic zone. It has been observed that anaerobic retention time should be long enough to reduce soluble COD to penetrate into aerobic zone. Longer anaerobic retention time such as 3 and 5 hours resulted in good phosphorus removal efficency. It was observed that the highest phosphorus removal efficency was obtained in reactor 2 with anaerobic time 3hours in the batch experient. In those systems without anaerobic cascade, severe filamentous bulking took place, even though the anaerobic retention time were similar to those of cascade systems.
전기분해에 의한 돈사폐수의 질소와 인 제거에 관한 연구
이성기(Seong Key Lee),송영일(Young Il Song),이노화(No Hwa Lee) 한국수처리학회 1999 한국수처리학회지 Vol.7 No.3
On this study, Al and Fe electrode applied to the batch reactors and A/O reactors for the removal of nutrients(N, P). It was supplied 1.5V, 3.0V with 2day HRT. First of all, three batch reactors were operated. Al electrode applied in B-II, Fe electrode applied in B-III, and 1.5 voltage was supplied. The removal efficiency of COD, T-N and T-P is 24%, 10%, 14% respectively. When Al+Fe electrode applied in B-I with 3V, 2day HRT, the removal efficiency COD, T-N and T-P is 77%, 50%, 82% respectively. Al+Fe electrode is more effective than each Al and Fe electrodes. As the second, two A/O reactors were operated with 3day HRT. A/O-I reactor is a control reactor, which was not supplied electricity. But, Al+Fe electrode was applied in A/O-II, which was supplied 3.0V. The removal efficiency of COD, T-N and T-P is 72%, 95%, 50% respectively in A/O-II reactor. In A/O-I reactor which is not supplied electricity, the removal efficiency of COD, T-N and T-P is 56%, 49%, 80 % respectively. Electrolysis should be eminent to remove T-P in swine wastewater. MLVSS/MLSS was 0.78 in A/O-I reactor and 0.63 in A/O-II reactor, which turned to 0.43 after 20days. MLSS was increased because of the metal ion extracted into the reactor. The color changed a lot as time goes by. Color of effluent is light yellow in A/O-II, but dark brown in A/O-I. The color in Swine wastewater is very difficult to remove, but it should be effective to remove the color in this system.
전기활성미생물법에 의한 축산폐수처리에 관한 연구 (1)
이성기(Seong Key Lee),송영일(Young Il Song),이진욱(Jin Wook Lee) 한국수처리학회 1997 한국수처리학회지 Vol.5 No.1
Electro-activated microoganism process combines FOBL, activated sludge process and EFOBL in sequence. Organic material is electrolyzed by oxidation-reduction reacted between solution and electrode. Metal ion isolated from both electric poles is adsorbed, coagulated and precipitated with suspended solid. When the temperature is 32℃, the removal rate of COD is 42%, which is most effective. To raise the temperature until 32℃, Iron needs 20V and Tungsten needs 15V. BOD is removed up to 40% with 3day HRT in FOBL and BOD removal rate in activated sludge process using effluent of FOBL is about 50% with 4day HRT, 80% with 6day HRT, 89% with 8day HRT. 90∼99% of BOD removal efficiency could be accomplished with 1day HRT in EFOBL. In the electro-activated microoganism process, Each removal rate of BOD, COD, TSS is 93.8%, 88.9%, 91.6% with 12day HRT. T-N, T-P are removed 73.1%, 73.1% with 12day HRT.
이성기 ( Seong Key Lee ),송영일 ( Young Il Song ),김현중 ( Hyun Jung Kim ) 한국수처리학회 2003 한국수처리학회지 Vol.11 No.2
N/A This study was performed to investigate removal of pollutants removal by advanced molecule decomposition wastewater treatment of livestock wastewater. This process was to applied several systems, especially ozone and ultrasonic. The results are as follows. The concentration of BOD in livestock wastewater was 11,712.9㎎/ℓ and BOD removal efficiency was 99.9% of the total process. The BOD removal rate appeared to raise the decomposition and sediment tank. This was reasonable for radical reaction, adsorption and coagulation. The COD removal efficiency was 99.6% and the concentration of COD was 4,742.2㎎/ℓ. The Primary decomposition process and sedimentation tank were shown to have a higher COD removal rate. The TSS removal efficiency was 99.8% and appeared to raise the primary sedimentation tank. It appeared effective for adsorption and coagulation. The T-N removal efficiency was 98.9% and revealed to raise the primary decomposition process. It was reasonable of ammonia stripping. The T-P removal efficiency was 99.9% and was shown to raise the primary sedimentation tank. It effected coagulation reaction. In conclusion, the results of this research suggested that advanced molecule decomposition process can be an effective treatment of livestock wastewater.
이성기 ( Seong Key Lee ),송영일 ( Young Il Song ),김현중 ( Hyun Jung Kim ),임항선 ( Hang Seon Lim ),서광엽 ( Gwang Yeob Seo ),이인호 ( In Ho Lee ) 한국수처리학회 2004 한국수처리학회지 Vol.12 No.3
N/A This study that do single cathode discharge structure electron generating device and do electron generating device with high voltage high frequency pulse corona with do electromagnetism wave device batch type experiment of synthetic wastewater and swine wastewater. The results are as follows. Appeared higher than Run A and Run C in temperature and pH change Run B reaction end 10 day in an experiment do single cathode discharge structure electron generating device batch. Run A pH change decreased by effect of created hydrogen peroxide as reaction is proceeded. Run B pH upward tendency is impact of hydroxides that is reaction product with free electron and water by that form electron generating device. In COD of Run B and Run C, T-N, T-P removal comparison Run B 15 - 20% higher appear . Run B COD, T-N, T-P removal on reaction 5day all items most High removal efficiency see . COD removal could raise removal efficiency to 88% to reaction 3day in occasion of sample of that concentration such as synthetic wastewater in an experiment do electron generating device with high voltage high frequency pulse corona. A large amount of electron and T-N removal that use radical of method confirmed that need reaction condition of reaction 4 - 5 day with synthetic wastewater and swine wastewater raising sample total high voltage pulse corona that use sample of 100i. Reaction 5day, T-N removal were seen 42.2% and 38.6% each. It is not good quality by method with high voltage high frequency pulse corona but a large amount of electron and radical did not influence to T-P removal. Result appeared that do not influence in organic matter and nutrient removal by an electromagnetic wave device producer singleness experiment.