BMP test를 통한 음폐수와 하수슬러지의 병합소화 특성 평가

이수영ㆍ윤영삼ㆍ강준구ㆍ김기헌ㆍ신선경(Su young LeeㆍYoung Sam YoonㆍJun Gu KangㆍKi Heon KimㆍSun Kyoung Shin) 유기성자원학회 2016 유기물자원화 Vol.24 No.1

혐기성 소화의 주요 조건 중 하나인 C/N비의 경우 하수슬러지는 5.40으로 낮게 나타난 반면 음폐수(Food waste leachate)는 21.84로 높게 나타났다. C/N비가 낮을 경우 혐기성소화의 저해 요인으로 작용될 수 있기 때문에 음폐수의 높은 유기물 농도 및 C/N 비를 활용하여 메탄가스 발생량 증가시킬 수 있었다. Tchobanoglous이 제안한 이론적 메탄가스 발생량 예측수식을 적용하여 메탄 및 바이오가스 발생량을 산정한 결과 하수슬러지 단일 혐기소화의 경우 305.6 mLㆍCH4/gㆍVS, 689.4 mLㆍCH4/gㆍVS의 메탄, 바이오가스가 발생하였고 음폐수 : 하수슬러지를 1:9로 혼합한 시료는 약 322 mLㆍCH4/gㆍVS, 3:7시료에서는 약 354 mLㆍCH4/gㆍVS, 5:5시료에서는 약 386 mLㆍCH4/gㆍVS의 메탄가스가 발생하는 것으로 분석되었다. BMP 실험 결과 1:9, 3:7, 5:5 비율로 병합 처리한 경우 각각 약 233, 298, 344 mLㆍCH4/gㆍVS의 메탄가스가 발생하였다. 따라서 음폐수의 혼합비율이 높아질수록 메탄가스 발생량은 증가하였고 하수슬러지와 음폐수의 혼합 비율에 따른 병합처리 시 하수슬러지 단독처리에 비해 다량의 메탄가스가 발생되었다. BMP 실험을 통해 생산된 메탄가스의 누적생산 곡선을 Modified Gompertz model과 first order kinetic model에 적용하여 추정한 결과, 메탄생성량은 Modified Gompertz model에서는 238.5, 302.3, 353.6 mL/gㆍVS 발생하였고 first order kinetic model에서는 242.8, 312.5, 365.5 mL/gㆍVS로 음폐수와의 혼합비율이 증가할수록 높게 나타났으며, 최대 메탄생성속도의 경우 3:7비율에서 48.2 mL/gVSㆍday로 최대 메탄생성 속도를 보였다. first order kinetic model의 1차 반응속도상수 k값은 1:9, 3:7, 5:5 비율에 따라 0.32, 0.22, 0.08day-1 나타났다. 1차 반응속도 상수의 경우 음폐수의 혼합비율이 낮을수록 높게 나타났다. Modified Gompertz와 first order kinetic model 모두 실험결과를 잘 모사하였으며, 실험결과와 모의결과의 적합도를 나타내는 상관계수(R2)의 경우 0.92∼0.98으로 높은 상관성을 나타내었다. We mix food waste leachate and sewage sludge by the proportion of 1:9, 3:7 and 5:5. It turns out that they produced 233, 298 and 344 CH4ㆍmL/gㆍVS of methane gas. The result suggests that as the mixing rate of food waste leachate rises, the methane gas productions increases as well. And more methane gas is made when co-digesting sewage sludge and food waste leachate based on the mixing ratio, rather than digesting only sewage sludge alone. Modified Gompertz and Exponential Model describe the BMP test results that show how methane gas are produced from organic waste. According to the test, higher the mixing rate of food waste leachate is, higher the methane gas productions is. The mixing ratio of food waste leachate that produces the largest volume of methane gas is 3:7. Modified Gompertz model and Exponential model describe the test results very well. The correlation values(R2) that show how the results of model prediction and experiment are close is 0.92 to 0.98.

탄소나노튜브를 이용한 고강도 나노복합재료

박영수(Young Su Park),허몽영(Mong Young Huh),안계혁(Kay-hyeok An),김은성,강신재(Shinjae Kang) 한국자동차공학회 2008 한국자동차공학회 지부 학술대회 논문집 Vol.2008 No.11

With major causes of exhaustion and global warming of limited fossil fuel, according to policy of saveenergy and nature-friendly products, it is needed for gas milage to beb increased by compulsion regulation (Corporate Average Fuel Economy, CAFE). For this regulation solution, the diverse and hard tries such as light-weight vehicle, electric car, and fuel cell have carried out to elevate engine efficiency and to reach to a next generation zero-emission vehicle. In light-weight field, it has been tried to find or make much stronger and lighter materials or composites, magnesium alloy and carbon fiber would be a powerful candidate in metals and reinforced plastic composites for light weight vehicles. But, we here introduced carbon nanotube (CNT), which is one of the highest Young’s modulus and strength, and its nanocomposite which would be a new and powerful material to make light weight vehicle. CNT reinforced nanocomposite would solve waste disposal to make up environmental problem and have the advantage in recycling problem that would be or has been occurred in other reinforced composites.

남성화를 보이는 여성에서 발견된 난소의 Steroid Cell Tumor 1예

조인호,정대훈,박영미,서영진,손영실,정철회,강영미,정수전,김영남,이경복,성문수,김기태 인제대학교 2006 仁濟醫學 Vol.27 No.-

Steroid cell tumor is a rare ovarian sex cord-stromal tumor which accounts for 0.1% of all ovarian tumors. Until now, only 4 cases have been reported in domestic literatures. Steroid cell tumor often secrets testosterone and presents virilization in adult women or precocious puberty in children. Treatment is often performed by surgical removal, adjuvant chemotherapy and radiation, but completely accepted treatment was not existed. We experienced a case of steroid cell tumor, which was manifested by typical virilization in a 43-year old patient, who was previously performed hysterectomy and unilateral oophorectomy. So, we present with a brief review of the literatures.

연령대별 요추 추간판탈출증 환자의 요근과 척추주위근 단면적에 대한 분석

공덕현 ( Deok Hyun Kong ),배광호 ( Kwang Ho Bae ),고호연 ( Ho Yeon Go ),강명진 ( Myung Jin Kang ),김준수 ( Jun Su Kim ),양기영 ( Kee Young Yang ),이재훈 ( Jae Hoon Lee ),은영준 ( Young Jun Eun ) 한방재활의학과학회 2010 한방재활의학과학회지 Vol.20 No.4

Objectives :This study was designed to evaluate the correlation of the cross-sectional areas(CSA) of paraspinalis(iliocostalis lumborum, multifidus, longissimus thoracis parts lumborum) and psoas muscle and sex, age, change of the VAS(visual analogue scale) and past history of chronic low back pain in patients suffering from HIVD(herniation of intervertebral disc). Methods :Medical records of 140 subjects with HIVD were retrospectively reviewed. The MRI(magnetic resonance imaging) findings on the patients were scanned and analyzed by PiView program to find the paraspinal and psoas muscle CSA and were evaluated by the correlation of sex, age, change of the VAS, and past history of chronic low back pain. Results :There was significant difference between groups in male and female, young-adults age and middle age, middle age and old age, young-adults age and old age. But the correlation of the paraspinal and psoas muscle CSA and past history of chronic low back pain were partially significant. On the other hand, the correlation of the paraspinal and psoas muscle CSA and change of the VAS were not significant. Conclusions :These results suggest that the cross-sectional areas(CSA) of paraspinalis and psoas muscle have relevance to sex and age.

전자 전단 간섭법과 유한요소법을 이용한 압력용기의 내부결함 측정에 관한 연구

강영준,강형수,채희창 한국공작기계학회 2001 한국생산제조학회지 Vol.10 No.2

The application of laser in pipelines was started from the base of using laser in nuclear facilities, chemical industries and poser plants. Because laser can be delivered to a remote area without any difficulties, the application of laser in many industries can solve many difficulties from limitation of access in danger area and reduce the risks of workers. Therefore, we developed a new experimental technique to measure internal defects of pressure vessels with a combination of shearography and image processing technique. Conventional NDT methods have been taken relatively much time, money and manpower because of performing as the method of contact with objects to be inspected. But digital shearography is a laser-based optical method Much allows full-field observation of surface displacement derivatives. This method has many advantages in practical use, such as loss sensitivity to environmental noise, simple optical configuration and real time mea-surement. In this paper, we find the optimum shearing magnitude with FEM and experiment and measured internal crack length of the pressure vessels at a real time and estimate the error of the results.

High-Volume 플라이애쉬 콘크리트의 기포조직에 관한 연구

강수근,서완용,정철우,김영수 釜山大學校生産技術硏究所 2002 生産技術硏究所論文集 Vol.61 No.-

산업 부산물인 플라이애쉬를 사용한 콘크리트는 내부에 존재하는 다량의 플라이애쉬에 의해 발생하는 공극의 분화 효과에 의해 보통의 콘크리트와는 다른 기포조직을 가질 수 있다. 콘크리트가 동결작용을 받을 시 발생하는 수압을 완화할 수 있는 기포의 영향범위는 기포간의 거리에 의해 결정되며, 이것의 최대값이 기포간격수라고 불리고 있다. 본 연구에서는 High-Volume 플라이애쉬 콘크리트의 기포조직을 카메라를 통하여 입력된 화상의 데이터를 컴퓨터에 의해 정략적으로 처리하는 화상분석법을 이용하여, 연행공기량과 플라이애쉬 콘크리트의 공기량, 비표면적, 기포간격계수 등을 보통 콘크리트와 비교, 분석함으로서 High-Volume 플라이애쉬 콘크리트의 기포조직을 파악하고자 한다. The purpose of this paper is to investigate the air-void spacing factor of high-volume fly ash concrete. For this purpose, the air-void spacing factor of the hardened fly ash concrete was determined by image analysis method for a large number of parameters adjusting such as air contents and the rate of fly ash replacement. Based on the study of the test results, the following conclusions may be drawn. 1) As the rate of fly ash replacement for high-volume fly ash concrete increases, air contents decrease. Furthermore the air content is varied approximately 1 % before and after hardening. 2) As the replacement of fly ash increases, the spacing factor increases due to adsorption of air entraining agent. 3) As the air content decreases and the specific surface increases, the spacing factor of High-Volume fly ash concrete increases.

MX₄-형 유무기 혼성화물의 구성 성분인 TTF-아민 유도체에 대한 연구

강선영,이수경,노동윤 서울여자대학교 2010 자연과학연구논문집 Vol.22 No.-

TTF derivatives containing alkylamine moieties, which are to be used in the design of MX_(4)-type organic-inorganic hybrid, are plotted to be synthesized via a protection of amine moiety with the tert-butoxycarbonyl (Boc) group. Boc-BMTTTF and (Boc)_(2)-BMTTTF were characterized by FT-IR and (1)^H-NMR. The cyclic voltammetry of Boc-BMTTTF indicated the presence of TTF moiety in this compound and showed the same two one-electron redox cycles (E1/2^(1) = 0.590 V and E1/2^(2) = 0.866 V) as those of TTF (E_(1/21)^1 = 0.426 V, E_(1/2)^2= 0.795 V). The Boc derivatives of TTF can be used directly for the preparation of MX_(4)-type organic-inorganic hybrid after the one-step deprotection of Boc group using TsOH.

삼척시 원덕읍 주민을 대상으로 한 류마티스 관절염 및 종양 진단

문수인,이도영,강진석 남서울대학교 2012 남서울대학교 논문집 Vol.18 No.1

Diagnosis of rheumatoid arthritis and cancer requires specific proteins as antigens and it has been developed by using a rapid detection kit and latex agglutination which identify circulating antibodies in the blood sera. In this study conducted by Namseoul University Health Medicine Care Service in October 2010, with the residents in Wondeok-eup, Samcheok city, Kangwon-do, the rapid diagnosis of the rheumatoid arthritis and cancer was performed by analyzing patients' blood sera. Rheumatoid arthritis and cancer were diagnosed in 3 and 1 patients, respectively in a total of twenty-six persons. In the rapid diagnosis of rheumatoid arthritis using by latex agglutination, there were one positive case of C-reactive protein (CRP), one positive case of Rheumatoid factor (RF) and one positive case of both CRP and RF detected. In the rapid diagnosis of cancer, one positive case of prostate specific antigen (PSA) was observed. Key Words : Diagnosis, Kit, Rheumatoid arthritis, Cancer

鐵棒 거꾸로오르기 技에 관한 考察 : 女大生을 中心으로

康榮洙 慶北大學校 師範大學 體育學硏究會 1988 體育學會誌 Vol.16 No.-

The purpose of this study was to analyze the correlation between straddle vault, physique, physical fiteness, and kinesthesis. 60 womens at Daegu National Teacher's college were participated as subjects. 30 subjects sho could perform straddle vault composed study group and the rest was assigned to comparison group. The results indicated as follows: 1. Overall, study group was higher than comparison group in the correlation between straddle vault, physique, physical fitness, and kinesthesis. Of physical fitness Test items, sit-ups ability was not correlated with straddle vault in both groups and foot-pushing force was not correlated with straddle vault ability in study group while slight correlation was shown in comparison group. Clear correlotion between arm extension strength and straddle vault ability was shown in study group, however, low correlation as appreaved in comparison gorup. 2. Kinesthesis was correlated in experiment group, so rotation sensation of study group is expected to be superior to that of comparison group. In colclusion, the study suggest that strengthening of arm strength and back strength is riquired primarily to be able to perform straddle vault.

충청도 지역 일대 저품위 질석의 팽창 특성에 관해서

강헌찬,김영훈,김광수,신선명 동아대학교 건설기술연구소 1996 硏究報告 Vol.20 No.1

The propose of this thesis was to study the usage of the low-grade Vermiculite from the Chung Chong province and also to increase its Value-added. A series of experiments have been done for separation as well as heat-expansion characteristics of the Chung Chong Vermiculite some conclusions can be drawn as follows; 1. Vermiculite from Chung-Yang and Hong-Shung areas wear better than that from Palabora's mine in South Africa in terms of the usefulness for an organic fertilizer. 2. The ratio of the volume expansion of Vermiculite increased along with the temperature. 3. In general, the ratio of volume expansion of the vermiculite from Chung-Yang, Hong-Shung and Palabora's mine in South Africa increased with temperature. But it decreased temporarily in the vicinity of 850℃. The result seems to be due to temporary decrease in the latent heat as the crystal water in the crystals such as Ca_(10)(Mg,Fe)₂A1₄Si_(9)O₃₄(OH)₄, K(Fe,Mg)₃AlSi₃O_(10)(OH)₂and K (Fe,Mg)₃AlSi₃O_(10)(OH)₂evaporated. 4. Above 1050℃, the crystal structure began to change and resulted in partial destruction to produce some dusts. Finally sintering occurred.