알루미늄 부식 반응조를 조합한 MLE공정에서 하수의 질소와 인 제거

박상일 ( Sang Ill Park ),최형일 ( Hyung Il Choi ),정경훈 ( Kyung Hoon Cheong ),박대훈 ( De Hoon Park ) 한국환경과학회 2013 한국환경과학회지 Vol.22 No.11

The pilot plant experiment was performed to investigate phosphorus and nitrogen removal from domestic wastewater byMLE process combined with aluminum corrosion reactor. When operating 0.5Q and 1Q to internal recycle and sludge recycle in the MLE process, the effluent CODMn concentration of internal recycle 0.5Q were higher than internal recycle 1Q, the removal efficiency rates of NH3-N in the internal recycle 0.5Q were was higher than internal recycle 1Q. Denitrification rates were about 86.8% in internal recycle and sludge recycle 0.5Q. When operating 0.5Q to internal recycle and sludge recycle in the MLE process, the removal efficiency rates of total nitrogen was the highest. The removal efficiency rates of total phosphorus was about 91.5% in the aluminum corrosion reactor.

차종별 도로교통소음레벨과 주파수 특성에 관한 연구

박상일 ( Sang Ill Park ),최형일 ( Hyung Il Choi ),정경훈 ( Kyung Hoon Cheong ),정원삼 ( Won Sam Jeong ),김난희 ( Nan Hee Kim ),이종국 ( Jong Kuk Lee ),오남승 ( Nam Seung Oh ) 조선대학교 공학기술연구원 2008 공학기술논문지 Vol.1 No.2

Quantitative evaluation for the sound source to predict the noise in the field point for the Road Traffic Noise was conducted. The traffic noise level and frequency characteristics as per types of cars for wave process until the noise reaches the field point was measured. 1. Frequency Characteristics while Driving Under freely flowing conditions of traffic, when you drive a bus on a public road, the traffic noise level showed a change of 6.2 dB(Z) from 83.1 dB(Z) to 89.3 dB(Z).The change of traffic noise level was 6.3 dB(Z) from 81.7 dB(Z) to 88 dB(Z) when a van was driven, and 10.8 dB(Z) from 79.5 dB(Z) to 90.3 dB(Z) when a one-ton truck was driven. Also, the change of traffic noise level was 18.6 dB(Z) from 81.3 dB(Z) to 99.9 dB(Z) when a motorcycle was running. All vehicles except for the motorcycle showed similar noise levels of 31.5, 500, 1 k and 2 kHz. The bus showed the highest noise level at 63 Hz and 125 Hz, and a van and an 11 ton truck showed the highest levels at 125 Hz. The one-ton truck was measured at 63 Hz for the highest noise level. The motorcycle was measured at 250 Hz with the highest noise level of 96.7 dB(Z) and at 500 Hz with 95.5 dB(Z), indicating the highest noise level among specific vehicles. 2. Characteristic of Frequency upon Departure The noise level when an urban bus stops to depart was 94.6 dB(Z), which is higher than that of stoppage and driving. When a bus stops, the normal car have an influence on the noise level, and after departure, it brings out the highest noise at 250 Hz and 500 Hz, which is caused by noises from the engine and exhaust. The noise level when a normal car stops to depart was higher than that of stoppage and driving at 85.7 dB(Z). It is high at 63 Hz as it is being reduced from 250 Hz. While a normal car is stopping, higher noise is made at 31.5 Hz, which is considered to be caused by engine noise.

도로교통 소음지도 작성에 관한 연구

박상일 ( Sang Ill Park ),최형일 ( Hyung Il Choi ),정경훈 ( Kyung Hoon Cheong ),염동익 ( Dong Ick Yeom ),진창범 ( Chang Beom Jin ) 한국환경과학회 2007 한국환경과학회지 Vol.16 No.12

감차수국 추출물이 당뇨 유발 흰쥐의 혈당에 미치는 영향

박상일 ( Sang Ill Park ),정경훈 ( Kyung Hoon Cheong ),최형일 ( Hyung Ll Choi ),김용현 ( Yong Hyeon Kim ),김학선 ( Hak Sun Kim ) 조선대학교 공학기술연구원 2009 공학기술논문지 Vol.2 No.2

The study was conducted to investigate the effects of Hydrangea macrophylla var. t1mnbergii extract on blood glucose and lipid concentrations in streptozotocin-induced diabetic rats. Experimental groups were classified into six groups, that is, normal control(Con) group, streptozotocin control(CI) group, Hydrangea macrophylla var. thunbergii(C2) group, hydrangea macrophylla var. thunbergii(50%) + polygonatum odoratum(50%)(C3} group, hydrangea macrophylla var. thunbergii(50%} + Cassia tora(50%)(C4) group, hydrangea macrophylla var. thunbergii(50%) + polygonatum odoratum(25%) + Cassia tora(25%)(C5) group. The blood glucose of C2 and CS groups decreased from 3 weeks. During 6 weeks, the weight of Con group increased S2.93% and C I group decreased S9%. The weight of C2, C3, C4 and CS group \vas 12, 27, 24 and IS%, respectively. The C2 group decreased the fewest. In the CS group, high density lipoprotein(I-IDL) cholesterol(47.4 ± 2.7 mg/dl) decreased the fewest and the triglycerides (63.9 ± 5.2 mg/dl) increased the fewest. Total cholesterol concentration of C2 group(63.8 ± 8.1 mg/dl) was lower t11an the C I group. In conclusion, it seems that Hydrangea macrophylla var. thunbergii extract has an effect on blood glucose, triglycerides, liver function protection etc.

고층 아파트의 도로교통소음 전파특성에 관한 연구

박상일 ( Sang Ill Park ),최형일 ( Hyung Il Choi ),정경훈 ( Kyung Hoon Cheong ),염동익 ( Dong Ick Yeom ),정원삼 ( Won Sam Jeong ),김난희 ( Nan Hee Kim ) 조선대학교 공학기술연구원 2009 공학기술논문지 Vol.2 No.1

Suggesting countermeasures against traffic noise, the result of modeling the noise level distribution of the apartment using RAYNOISE is as follow. l. Characteristic of Noise Level Attenuation as per Frequency of Apartment Space Comparing the difference of measured values on the balcony and in the enter of the living room had a minus value for an applicable value of 62%, which means the balcony is the path where the, sound is being passed. Because the center of the living room is a closed space, it is considered that the sound became higher by reflection and diffraction of sound in the living room. Change of frequency. Attenuation as per space in the 1st, 5th and 8th floors showed the attenuated condition becoming greater as frequency rose by 1 kHz, and it became greater on the higher floor at 31.5 Hz and 63 Hz. On the 11th floor, 63 Hz appeared to have a higher attenuated condition, and it was attenuated similarly in general. 2. Modeling Using RAYNOISE for Noise Level and Characteristics of Frequency in Apartment Space Noise levels measured on the exterior wall of the apartment, on the balcony and in the center of a living room revealed to be higher in low frequency bandwidths in the lower floors. They decreased on the higher floors including the 7th and 8th floors, increased then decreased again on the 9th floor. The noise level in the living room was 45.3 dB(Z), which appeared to be higher than that of the balcony(41.1 dB(Z)). It was also higher than the balcony in all frequency bandwidths. We then compared noise level in two cases while the window of the living room was open. The first case kept the window of balcony 2(bed room 2 directions) closed while the window of balcony 1(living room directions) remained open. The second case kept the window of balcony 1(living room directions) closed while the window of balcony 2(bed room 2 directions) remained open. The noise level in the center of the living room was 45.0 45.6 dB(Z) in the former case and 28.5 29.5 dB(Z) in the latter, thus showing the attenuated effect of f 5.9 16.6 dB(Z). The attenuated effect appeared to be 16.9 17.9 dB(A) characteristics of A.

수죽력과 수죽력 스팀 추출물의 항균활성 및 아질산염 소거작용에 관한 연구

박상일 ( Sang Ill Park ),최형일 ( Hyung Il Choi ),위환 ( Hwan Wi ),박대훈 ( Dae Hoon Park ) 조선대학교 공학기술연구원 2009 공학기술논문지 Vol.2 No.3

In the present study, we evaluated the antibacterial activities and Nitrite scavenging ability of bamboo sap and bamboo sap steam extract. Our analysis revealed that the total phenolic compounds containing the tannic acid in the bamboo sap extract showed 12.7% and in the case of bamboo sap steam extract was 20.9% respectively. The nitrite scavenging ability of bamboo sap steam extract showed about 51%. The antibacterial activities of bamboo sap steam extract on Bacilus subtilis, Listeria monocytogenes, Salmonella choleraesuis subsp. Choleraesuis and Escherichia coli were 13.8, 12.0, 13.5 and 8.3 mM respectively. Furthemore, the bamboo sap steam extract have showed thermostability and no effect on their antibacterial property under themal conditions. Therefore, this finding is useful for the utility of these compounds as additives in food preservations.

한국 남동해안 경주-울산 경계지역 지경리 일대 해안단구 지형발달

황상일(Sang-Ill Hwang),윤순옥(Soon-Ock Yoon),박한산(Han-San Park) 대한지리학회 2003 대한지리학회지 Vol.38 No.4

한반도 남동해안의 감포와 중부 동해안 정동진에서 발견된 해안단구 고고위I면과 고고위Ⅱ면을 울산-경주 경계지역 지경리 일대에서 재차 확인하였다. 특히 이곳에는 현재까지 우리나라에서 보고된 해발고도가 가장<br/> 높은 해안단구인 구정선고도 140m보다 한 단 더 높은 해발고도 155m인 고고위 지경(HH JK)면이 분포한다. 따라서 지경리지역 고고위면의 구정선고도는 해발고도 155m, 140m, 115m로 측정되었고, 형성시기는 각각 MIS 17(72~69만년 BP), MIS 15(63~56만년 BP)와 MIS 13(51~48만년 BP)으로 편년되었다. 또한 고고위면의 규모가 매우 큰 것은 기반암과 고고위면 형성시 해안 지형의 특성에 기인하는 것으로 생각된다. 동해안 중부와 남부에서 고고위면을 비롯한 고위면, 중위면, 저위면의 구정선고도체계가 같으므로, Pleistocene 중기 이후 동해안에는 남북간 지반융기량의 차이가 존재하지 않는다. 해안단구 고고위 지경면, 고고위 I면, 고고위 II면, 고위 I면, 고위 II면의 구정선고도와 형성시기와의 관계로부터 얻은 동해안지역 지반 융기속도는 0.23mm/y로 거의 균일하다. The existence of coastal terraces, HH(High higher) surfaces found at Gampo of southeast coast and at Jeongdongjin of the central east coast were confirmed at Jigyeong-Ri, the areal border between Gyeongjuand Ulsan city on the southeast coast of Korea Peninsula. Especially this study reports HH JK-surface located on the 155m a.s.l., which is the highest altitude among the ancient shorelines of the coastal terraces in Korea. The HH surfaces on the study area are classified into HH JK at 155m, HH I at 140m and HH II at 115m, and each formation stage is related to MIS 17(720~690ka BP), MIS 15(630~560ka BP) and MIS 13(510~480ka BP) respectively. The HH-surfaces remain to be larger than those of H- and L-surfaces. The reason is caused by the unique factors of the coastal geology and morphology on the study area during the formation stage. And also the areal difference by the magnitude of upheaval doesn’t exist from north to south because the altitude system of ancient shoreline on each coastal terrace is same along the east coast. The upheaval rate of the eastern coastal areas was measured in the relation to the ancient shoreline and formation stage among the coastal terraces such as HH JK-, HH I-, HH II, H I- and H II surface, and was almost same as 0.23mm/y.

연구논문 : 철도교통소음의 특성에 관한 연구

최형일 ( Hyung Il Choi ),박상일 ( Sang Ill Park ),염동익 ( Dong Ick Yeom ) 한국환경과학회 2007 한국환경과학회지 Vol.16 No.7

감차수국의 채엽시기와 추출조건에 따른 이화확적 특성에 관한 연구

김학선 ( Hak Sun Kim ),박상일 ( Sang Ill Park ),최형일 ( Hyung Il Choi ) 조선대학교 공학기술연구원 2009 공학기술논문지 Vol.2 No.1

In this study, it results to effect of Nitrogen, amino acids, antioxidant activity by picking time of Hydrangea macrophylla var.thunbergii and compare to phyllodulcin`s content by extraction condition. There was not different in the moisture content 9.08 ~ 9.11 % by Hydrangea macrophylla var.thunbergii picking time. Total nitrogen content of SP-I(July), SP-II(August) and SP-III(September) was each 4.33 ± 0.76, 3.82 ± 0.43 and 3.98 ± 0.34%. SP-I which was the earliest high picking time. The content of minerals depend on early of picking time had many K, Na, Fe, Cu, Ni and late of picking time had many Ca, Al, Mn, Zn. It is desirable to pick it up earlier for the high quality. Because the content of vitamin C was increased by progressing maturity, but the main soluable component as amino acids, caffeine, the total nitrogen was decreased. The content of amino acids was high when picking time was earliest. The antioxidant activity of SP-I 3.09, SP-II 3.70, SP-III 4.73% was lowest when picking time was latest. This results the studying to Hydrangea macrophylla var.thunbergii by extraction condition. The phylloducin`s content of water extraction and 5% ethanol extraction were highest at 60℃.

녹차종자를 이용한 캐리어오일에 관한 연구

김용현 ( Yong Hyeon Kim ),박상일 ( Sang Ill Park ),위환 ( Hwan Wi ),김학선 ( Hak Sun Kim ) 조선대학교 공학기술연구원 2009 공학기술논문지 Vol.2 No.2

This study in order to use the green tea seed with the carrier oil investigated the physicochemical characteristics of green tea seed, fatty acids, crude saponin and refining conditions. Saturated fatty acids of the green tea seed oil were analyzed with palmitic. palmitoleic, heptadecanoic, stearic acid and the unsaturated fatty acids were analyzed with oleic, linoleic, linolenic, eicosenoic acid. Oleic acid content was the highest at 54.2%. Unsaturated fatty acids (82.25%) of green tea seed oil ratio to Saturated fatty acids (17.75%) is about 82 : 18. The green tea seed oil observes with the fact that in order for the unsaturated fatty acids content to be high very it will be able to apply with the plant resources. In order for the unsaturated fatty acids content of the green tea seed oil to be very high it must be able to apply with the plant resources.Acid value of the oil which is refined with alkali-refine, bleaching, deodorizing process O.72(mg KOH/g), iodine value is 91.97(g/100g), peroxide value is 1.87(meq/kg), saponification value is J87.8(mg KOH/g).