부산 온천천의 하계 우수기 수질 및 퇴적물 환경 특성

이영형,문창호,강현정,최성률,김석현,Lee, Young-Hyeong,Moon, Changho,Kang, Hyun-Jung,Choi, Seong-Ryul,Kim, Suk-Hyun 한국환경과학회 2020 한국환경과학회지 Vol.29 No.6

Water and sediment qualities were investigated in the Oncheon Stream and at the Wondong bridge of the Suyoung River, during the summer rainy season, 2019. Dissolved oxygen (DO) showed the lowest levels at 4.7 and 5.0 m/L, and biogeochemical oxygen demand (BOD) showed the highest at 5.3 mg/L downstream where the tributary flows into the main river. Chemical oxygen demand (COD) increased from 2.0 to 5.9 mg/L on average as it flowed downstream, The COD/BOD ratio decreased gradually as it flowed downstream, reaching 1.0. However, COD/BOD ratio at the Wondong bridge was 5.8-22.2, indicating that easily biodegradable and non-biodegradable organic matter flows into the Oncheon Stream and Suyoung River, respectively. Total nitrogen (T-N) / total phosphorus (T-P) ratio tended to decrease from 72 to 21 as it flowed downstream, measuring 71 to 86 at the Wondong bridge. The water quality index (WQI) generally improved better than grade IV after heavy rainfalls. However, DO and T-P were the parameters that deteriorated the WQI. Ignition loss (IL), COD, T-N, and T-P of sediments had distribution of 1.44 ± 1.01%, 0.35 ± 0.16%, 43 ± 63 mg/kg, and 10.9 ± 21.9 mg/kg, respectively. These were several times lower than the annual averages of IL, T-N, and T-P in 2017 before the dredging project was conducted in the first half of 2018.

음식물쓰레기 주입형태에 따른 혐기성 소화조의 메탄가스발생특성에 관한 연구

이영형(Young-Hyeong Lee),박성현(Sung-Hyun Park),성낙창(Nak-Chang Sung) 유기성자원학회 2001 유기물자원화 Vol.9 No.4

본 연구에서는 음식물 쓰레기의 주입형태에 따른 혐기성 소화조의 메탄가스 발생특성에 대해 알아보고자 하였다. 하수슬러지와 음식물 쓰레기 를 각각 1:0, 1:0.1, 1:0.3 , 1:0.5, 1: 1. 1:2의 비율로 혼합소화시킨 반응조에서의 주입 g VS당 메탄가스 발생량은 40mL, 85mL, 62mL, 67mL, 72mL 및 73mL CH4/g VSarlded였다. 음식물 쓰레기의 업경을 raw food , 2 ~4mm 그리고 2mm이하로 주입하여 혼합소화시킨 반응조에서의 메탄함량이 각각 51.1%, 53.1% 및 50.6 %로 나타나 별차이 를 보이지는 않았으나 입경이 작을수록 높은 메탄발생량을 나타내는 것으로 조사되었다. 주입 음식물 쓰레기의 세척여부와 회수에 따른 탄발생량은 음식 물 쓰레기 를 7 ~8회세척한 경우가 세척하지 않은 경우보다 약 llmL CH4/g VSadded 많이 발생하였다 This srudy was performed to investigate production characterisitic of memane gas in anaerobic digestion reactor according to input rype of food waste. In me ptoduction rates of CH4 gas per g VS,dded, reactor R2, R3, R4, R5, and R6 in which sewage sludge and food waste were combined with mixing ratio of 1:0.l, 1:0.3, 1:0.5, 1:1, and 1:2 showed 85mL, 62mL, 67rnL, 72mL, and 73rnL CH4/g VSadded which were much more man sewage sludge digestion alone. Methane content according ro crushing size of food waste respectively showed 51.1 0/0(raw food) , 53.1 0/0 (2 ~4mm), and 50.60/0( <2mm), In case of memane production according to washing of food waste, R12(7 ~8 times washing) showed me highest memane production.

고정폐색구간에서 복합열차운행에 대한 신호제어기술 고찰

이영훈(Lee Young-Hoon),김종기(Kim Jong-Ki),류상환(Ryu Sang-Hwan),이영형(Lee Yeong-Hyeong) 한국철도학회 2001 한국철도학회 학술발표대회논문집 Vol.- No.-

본 논문은 고정폐색구간에서 차량운전 특성과 속도패턴이 다양한 다종의 열차들이 동일선로에서 복합되어 고밀도 운행을 위한 방법으로, 신호현시에 대한 제반정보를 차상으로 전송받아 기관실 신호표시반에 신호를 현시하는 차상신호방식(Cab Signalling System)중에서, 선행열차의 위치, 선로조건 등 지상의 상태정보를 후속열차가 수신하여 열차 자신의 제동특성 등 차량정보와 비교 분석하여 제동거리를 계산하는 distance to go 방식으로 열차운전속도를 제어하는 ATP (Automatic Train Protection) 시스템을 제안하였다. 폐색구간별 고정된 신호속도단계가 부여되는 ATC(Automatic Train Control) 시스템에서는 운행패턴이 같은 단일차종의 열차만 운행하는 구간에서는 일정속도에 의한 폐색구간 분할로 구간내 distance to go 신호체계가 이루어지지만, 차종과 속도패턴이 서로 상이한 복합열차들의 운행구간에서는 안전거리 확보를 위하여 저속열차의 제동거리를 기준으로 폐색구간 분할 및 속도결정이 이루어지므로 ATP 방식보다 운행효율이 다소 떨어짐을 알 수 있었다. 이를 차량특성과 속도패턴이 다른 3개의 열차를 모델로 하여 열차별 감속도에 의한 제동특성을 ATC와 ATP 선호제어체계에 접목시켜 시뮬레이션을 하였다.

음식물쓰레기와 하수슬러지의 혼합소화 처리에 관한 연구

김정권(Jung Kwon Kim),이영형(Young Hyeong Lee),김철희(Chul Hee Kim),정유진(Yu Jin Jung),성낙창(Nak Chang Sung) 大韓環境工學會 1999 대한환경공학회지 Vol.21 No.5

폐굴껍질의 정석반응을 이용한 수중 인제거 특성

이호수,정유진,김은호,성낙창,이영형 동아대학교 환경문제연구소 1998 硏究報告 Vol.21 No.2

The technology of removing phosphorous, considered as one of the most important control nutrients causing eutrophication in various water bodies, have been investigated by many researchers. Recently, phosphorous crystallization process is emerging as a new technology for phosphorous removal. In this study, waste oyster shells which can be easily obtained from the ocean, were used as a seed crystal, and their effects of several physical/chemical factors on the phosphorous removal efficiencies were examined by batch tests. Ca^(2+) and pH affected phosphorous crystallization process using waste oyster shells. As alkalinity of wastewater increased, phosphorous removal efficiencies gradually decreased. Phosphorous removal efficiencies were increased, as specific area and contact efficiency per unit area of waste oyster shells were increased. In case of high temperature, phosphorous crystallization process was rapidly advanced and phosphorous removal efficiencies were increased. Depending on X-ray diffraction analysis, it was showed that generation materials extracted from the surface of waste oyster shells with short reaction time were dominated by CaHPO₄ ·2H₂O, but progressed to Ca_(5)(OH)(PO₄)₃.

흡착제로써 폐자원을 이용한 염색폐수의 색도제거

김은호,성낙창,김수생,김국태,이영형 동아대학교 환경문제연구소 1998 硏究報告 Vol.21 No.1

Dyeing has always had a pressing need for techniques that allow economical pretreatment for color removal in wastewater. The effectiveness of adsorption for color removal from dyeing wastwater has made it an ideal alternative to other expensive treatment options. This study deals with an investigation on four waste resources locally available in dyeing wastewater treatment for color removal. Peat, bentonite, slag and fly ash were utilized for this study and their performance evaluated against that of granular activated carbon. Color of dyeing wastewater was high removed in peat, bentonite and slag except for fly ash. In point of recycling, if waste resources substituted for a valuable adsorbent such as granular activated carbon, peat, bentonite and slag could look forward to an expected economical effect.

부산광역시 일부하천의 계절적·년도별 수질특성 비교분석

정유진,문종익,성낙창,김부길,이영형 동아대학교 환경문제연구소 1999 硏究報告 Vol.22 No.1

This study is carried out to investigate the water quality change trends in Pusan Metropolitan streams. The temperature of the streams are moderate except in winter period and this can be explained by the Korean meterological characteristics. The pH does not vary by the time but some points are a little low. BOD_(5) and COD_(Mn), the index of water contaminants, be shown as characteristic domestic waste water patterns. The nutrient matters, such as total nitrogen and total phosphate, are appeared to be low. The chronic water quality, as BOD_(5) and COD_(Mn), shows that the loading rates in 1998 are smaller than the past(1983, 1992). Some points show a little high loading in autumn, but this needs more investigation to make clear the cause(s).

폐굴껍질을 산성토양 적용시 토양의 화학적 특성변화에 관한 기초 연구

임진희,문종익,김성우,성낙창,이영형,윤태경 동아대학교 환경문제연구소 1999 硏究報告 Vol.22 No.2

Oyster shell has caused environmental problems in the coast. But it is possible to be used as an acidic soil amendment because it is the alkalic material of pH 9.0. In order to evaluate the utility of the crushed oyster shell as a soil amendment, acidic sandy loam soil was amended with it and then Chinese cabbages were cultivated in pots. The amount of the oyster shell was ⅰ)none, ⅱ)0.5kg/㎥, ⅲ)1.0kg/㎥, ⅳ)1.5kg/㎥, ⅴ)2.0kg/㎥ and ⅵ)2.3kg/㎥. The particle size of oyster shell consists of 34.88% of 40∼100mesh and 14.98% of larger than 100 mesh. It increased pH and the contents of available P₂O_(5) and SiO₂ and exchangeable Ca in used soil The application of oyster shell also increased the height and diameter of Chinese cabbages.