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.

제조기업의 공급사슬통합과 성과

윤재홍,김영수,이근호 東亞大學校 2002 東亞論叢 Vol.39 No.-

Recently, many manufacturing companies had increased interests in supply chain integration activities between customers and suppliers and their performances. The reasons are increasing costs in manufacturing, faster life cycle of products and lack of scared resources. The purpose of this study is to search the literature about the supply chain integration activities among manufacturers, suppliers and customers. First, supply chain integration was composed of four ; logistics integration, supplier integration, purchasing integration, and information integration. Second, we try to verify the relationship between supply chain integration strategy, supply chain integration performance, and manufacturing performance. Third, we proposed the conceptual framework of supply chain integration and performance in manufacturing. This proposed model will be helpful for achieving competitive advantage and will be analyzed empirically in the near future.

충남대학교 기초과학분야의 효율적 육성에 관한 연구

윤화중,진성일,윤민중,윤혜수,이영하,최철규,이천배,신대현 충남대학교 자연과학연구소 1986 忠南科學硏究誌 Vol.13 No.2

Chungnam National University (CNU) is located in Daeduk Science Town, a center of science and technology in Korea, and it is expected to play an important role in the development of science in Korea. With this in mind, the basic natural sciences at CNU should be more actively supported in both education and research. Accordingly analysis and comparison of the basic science program at major college in Korea as well as those in the USA and Europe has been performed. The current cooperative relationship between CNU and research institutes in the science town has also been analyzed. This study has resulted in propositions to make more efficient the upbringing of the basic sciences at CNU, by focusing on the following points ; a) to improve academic affairs, b) to make graduate studies substantial, c) to secure highly qualified faculty members, d) to increase cooperation in research between CNU and reserch institutes, e) to enlarge research laboratories and acquire more equipment and facilities.

제조기업의 e-비즈니스 전략을 통한 공급사슬 통합에 관한 연구

윤재홍,이근호,김영수 東亞大學校 經營問題硏究所 2002 經營論叢 Vol.23 No.-

This study examines how to achieve the supply chain integration by developing e-business strategy in the manufacturing company. In order to achieve this goal, the definition of e-business was introduced, first. Second,environment analysis for developing e-business strategy was conducted. Third,the process developing e-business strategy was explained, Forth, the supply chain integration developing e-business strategy was proposed. The proposed model showed the interaction among manufacturing goals(such as cost, quality,delivery,and flexibility), e-business strategy,suppliers and customers. The model was applied for the automobile and heavy weight machine industries. This model will be helpful to enhance the competitiveness in the age of e-bussiness management.

대학생을 위한 예비 부모 교육 프로그램 개발을 위한 연구

윤기영,전효숙,박상임,이미숙,이석란,박수옥 서원대학교 학생생활연구소 1998 학생생활연구 Vol.16 No.-

The purpose of this study are to examine reference materials, existing lecture analysis, investigate how student response about new lecture model and to project the basic direction of pre-parent education program. The result of this study are as follows ; <Lecture Model : Parent and Child> Sequence Theme 1 Introduction, Positive Self-Concept 2 Love and Sex 3 Friends versus Lovers 4 Marriage 5 Parenting and Parent's Role 6 Pregnancy and Embriology 7 Brith 8 Middle Term Exam 9 Parent's Role for Infant and Toddler 10 Parent's Role for Child 11 Parent's Role for Youth 12 Society and Environment for Child Care 13 Communication for Parent-Child 14 Problem solving method for Child Care 15 Parent in Future 16 Final Exam

그래픽 프로그래밍 언어와 가상 인스트루먼트를 이용한 네트웍 기반 실시간 실험실 자동화 시스템의 설계

윤근수,정원영,박영석 경남대학교 공업기술연구소 2000 硏究論文集 Vol.18 No.-

오늘날 개인용 컴퓨터와 네트웍의 발전과 함께 가상 인스트루먼트는 프로세스 자동화, 공장 자동화, IC패킷 테스트, 데이터 획득, 실험실 자동화, 기계 컨트롤 등의 광범위한 자동화 영역에 사용되고 있다. 가상 인스트루먼트는 네트웍을 통한 개방구조로 원격지에서 제어 및 모니터 링을 제공하며, MMS (Modular Measurement System)와 재사용 가능한 컴퓨터 프로그램 모듈을 이용하여 시스템의 개발 및 유지 보수가 용이해서 비용을 줄일 수 있다는 장점을 가지고 있다. 본 논문에서는 그래픽 프로그래밍 언어인 HP VEE(Hewlett Packard Visual Engineering Environment)와 가상 인스트루먼트를 이용하여 네트웍 기반 실시간 실험실 자동화 시스템을 효과적으로 디자인하는 방법을 제안하였고, 초전기(Pyroelectricity)현상을 측정하는 시스템에 적용하여 전형적인 시스템 디자인에 비하여 효과적인 결과를 얻었다. In the present, because of the developments of the personal computers and the communication networking technologies, VI (virtual instruments) is getting popular and useful in the fields of the automatic processings and controls, IC packet test, factory automation, DAQ(data acquisition), laboratory automation, and machine control etc. VI System provides the control/ monitoring measurement processes from the remote location, the open structures by networking, an easy maintenance and inexpensive developments using MMS (modular measurement system), and the usability of a numerous reusable computer program module. In this paper, we propose a method to design network-based real-time laboratory automation system using the graphic programming language, HP VEE (Hewlett-Packard Visual Engineering Environment), and virtual instruments. Then for the pyroelectricity measurement system, the proposed system gives more effective results than the conventional system based on the processing times and utilities.

분리 대두단백의 소화율과 전기영동패턴에 미치는 Phytate의 영향

윤재영,조희경,이서래 이화여자대학교 생명과학연구소 1993 생명과학연구논문집 Vol.4 No.-

Phytate 함량이 다른 두 분리 대두단백(HSPI; high-phytate soy protein isolate, LSPI; low-phytate soy protein isolate)을 제조하여 pH 및 phytate 첨가량이 그들의 용해도와 소화율에 미치는 영향을 알아보았고 분리 대두단백을 용해도에 따라 분별한 후 그들의 특성을 전기영동을 통하여 알아보았다. LSPI와 HSPI 모두 분자량이 13.6~81.1 kDa 에 이르는 단백질 성분으로 이루어져 있으며 산성 pH에서 18.0~35.0 kDa의 단백질은 phytate와 잘 결합하지 않는 특성을 가졌다. LSPI를 용해도에 따라 분별하였을 때 gliadin을 구성하는 단백질은 pH2에서 phytate와 쉽게 결합하지 않았다. 대두 단백질은 pepsin 소화율은 phytate 첨가량이 증가할수록 크게 저하되었다. This study was carried out to examine the effects of phytate addition on the solubility and digestibility of the low-phytate soy protein isolate (LSPI) and high-phytate soy protein isolate (HSPI). In SDS-polyacrylamide gel electrophoresis of soy protein isolate, different patterns of proteins were observed in both HSPI and LSPI at various phytate and pH levels, suggesting that phytate may bind specifically to certain protein fractions at a particular pH. For example, proteins of M.W. 1.8~3.5kDa resisted phytate binding at acidic pH. LSPI was fractionated into albumin, globulin, gliadin and glutelin; and phytate was shown to bind with difficultly to all three gliadin bands. Effects of phytate on the pepsin digestibility of soy proteins were apparent, especially in the short term digestion.

CCl₄에 의한 Ta₂O_5의 염화반응에 대한 속도론적 연구

김병수,최영윤 대한금속재료학회 2005 대한금속·재료학회지 Vol.43 No.5

The chlorination reaction of tantalum pentoxide is one of the important intermediate steps to produce high purity tantalum metal by a chlorination method. The results of experiments on the kinetics of the reaction between tantalum pentoxide and gaseous carbon tetrachloride are presented in this paper. The experiments were carried out in the temperature range 723 and 798 K, using a thermogravimetric analysis technique. The solid reactant was powder of tantalum pentoxide (-44 μm). A shrinking core model was found to fit well the chlorination reaction rate over the entire temperature range. The chlorination reaction was controlled by surface chemical reaction, and an activation energy of 46.2 kJ/mol (11.0 kcal/mol) was obtained. (Received February 1, 2005)

내시경적 조임근절개술후에 발생한 췌십이지장 가성동맥류 1예

박수영,김윤정,박진한,전현수,박시형,이영진,이은지,김지현 仁濟大學校 白病院 2010 仁濟醫學 Vol.31 No.-

We reported a case of pancreatic pseudoaneurysm, involving pancreaticoduodenal artery, developed after endoscopic retrograde cholangiopancreatography(ERCP) with endoscopic sphinterotomy. A 54 year old woman was transferred to our hospital due to sustained hematochezia and hypovolemia. A week before admission, she underwent ERCP with endoscopic sphinterotomy for acute cholangitis in local clinics. She developed abdominal pain and hematochezia at 12 hours after the procedures. A post procedure contrast enhanced computed tomography of abdomen demonstrated a pseudoaneurysm in inferior portion of pancreatic head. This was not present on the pre procedure contrast enhanced computed tomography of abdomen and was thought to arise from the pancreaticoduodenal artery as a complication of the pre sphincterotomy. She was brought to our emergency room in a state of hypovolemia. A upper endoscopy showed active bleeding from ampula of vater. An celiac angiography demonstrated pancreatic pseudoaneurysm involving inferior pancreaticoduodenal artery and selective coil embolization of was performed.

10kW BIPV의 PCS 특성에 관한 연구

차인수,윤정필,윤영찬 東新大學校 工業技術硏究所 2004 工業技術硏究 Vol.10 No.-

BIPV(Building Integrated PV) system that is united on constituent outer covering of building can expect dual effects that reduce expenses for establishment of PV system by adding new function as outer covering material of building except producing the electricity. Also, it is a profitable technology in the economical field because it does not need the building site for a special purpose for the establishment as existing stand along PV system. In this paper, it was simulated through the theoretical consideration about output characteristic analysis of PCS and web-based monitoring of 10kW BIPV, finally was examined the validity through the experiment. BIPV system that is proposed in this paper, was established in BIC(Biotechnology Industrialization Center) of Dongshin University, composed with PCS and Web-monitoring system.