제지슬러지와 돈분을 이용한 퇴비화과정중 이화학적 특성 변화

민경훈(Kyoung-Hoon Min),장기운(Ki-Woon Chang),유영석(Young-suk Yu) 유기성자원학회 2000 유기물자원화 Vol.8 No.4

본 연구는 퇴비화에 있어서 제지 슬러지 (PMS)와 돈분(PM)의 최적흔합비율을 결정 하기 위해 실시하였다- 제지슬러지는 풍부한 탄소와 적은 질소를 함유하고 있기 때문에 탄소의 공급원으로서 사용되었다. 또한 건조된 제지슬러지는 혼합물의 수분을 조절할 목적으로 점가되었다. 처리구는 PMS-100(PM O%+PMS 80%+DPMS 20%), PMS- 85(15+65+20), PMS-70(30+50+20), PMS-55(45+35+20) 4개로 구성되었다. 퇴비화은 호기성조건에서 정체식(규모 1. 25 m3)으로 실행되었으며 일일 15분씩 공기 를 공급하였고 퇴비화초기에는 주마다 뒤집기 를 실시하였다 퇴비의 부숙도를 평가하기 위해 온도, pH, C/N율과 색도의 이화학성 변화를 조사하였다. 이화학성을 분석한 결과 효과적인 퇴비화을 위한 수분과 C/N율의 최적조건은 각각 25~30과 55~60%이었다. This srudy was conducted to determine the optimal mixing ratio of the paper mill sludge(PMS) and pig manure(PM). Since rhe former conrains lots of rotal carbon and low nitrogen, it was used as carbon source. A1so, dried paper miU sludge(DPMS) was added ro the mixture ro conrrol the water conrent. The treatmenrs was composed of four as follows, PMS-100(PM O%+PMS 80%+DPMS 20%), PMS-85 (l 5+65+20) , PMS- 70(30+50+20), and PMS-55(45+35+20). The mixrures were composred under aerobic condition in 1.25 m3 static piles. The piles were aerated for 15 minutes per day and turned over rhe mixture once a week at rhe early stage of compostmg To estÏmate the maruriry of composts, rhe changes of physico-chemical properries such as temperarure, pH, C/N ratio and color were monirored every week. The 25~30 and 55~60% as optimal condition of C/N ratio and moisture conrenr were respectively recommended for effective composting by rhe evaluation of rhe changes of phsico-chemical properries for materials taken hom compost ftles during rhe composting period. When rhe 30 때d 45% ofPM were mixed wi버 PMS, 나le maruriry time at I않st demanded ro rhe stable state were shorrεned and rhe qualiry of rhe fìnal product was improved in a view of nutritional components.

자치영역 네트워크 토플로지 작성 알고리즘

민경훈 ( Kyoung Hoon Min ),장혁수 ( Hyuk Soo Jang ) 한국정보처리학회 2000 정보처리학회논문지 Vol.7 No.4

A network topology has been an important factor for an efficient network management, but data collection for the network configuration has been done manually or semi automatically by a network administrator or an expert. Requirements to generate an intro-domain network topology ar usually either all IP addresses with subne subnet/supernet mask or the network identification of all IP addresses. The amounts of traffic are generally high in the semi-automatic system due to using large number of low-level protocols and commands to get rather simple data. In this paper, we propose an algorithm which can be executed with only publicly available input. It can find all IP addresses as well as the network boundary of an intra-domain by using an intelligent method developed in this algorithm. The collected data will be used to draw a network map automatically by using a proposed network topology generation algorithm

수평축 해류발전 로터의 설계와 성능해석

조철희(CHUL-HEE JO),김경수(KYUNG-SU KIM),민경훈(KYOUNG-HOON MIN),양태열(TAE-YUL YANG),이현상(HYUN-SANG LEE) 한국해양공학회 2002 韓國海洋工學會誌 Vol.16 No.1

In this research, a design guideline of current generating HAT rotor and acceptable field rotor in offshore environment is proposed. To design HAT rotor model, wind mill rotor design principles and turbine theories were applied based on a field HAT rotor experimental data. To verify the compatibility of the rotor design method and to analyze the properties of design factors, 3 rotor models were designed and experimented in a circular water channel. Three rotor models were designed according to different blade numbers and blade shapes. By changing flow velocity, rotor rpm, the rotor power and efficiency were measured and the properties of rotor were estimated. The results can be effectively applied to the design of current generation rotor.

항공사진을 이용한 정사투영영상생성 모듈 개발

유복모(Yeu Bock-Mo),이석군(Lee Suk-Kun),김의명(Kim Eui-Myoung),민경훈(Min Kyoung Hoon) 대한공간정보학회 1998 대한공간정보학회지 Vol.6 No.2

고품질의 돈분 퇴비를 위한 합리적인 퇴비화 조건 개발

장기운(Ki-Woon Chang),유영석(Young-Seok Yu),민경훈(Kyoung-Hoon Min) 유기성자원학회 2002 유기물자원화 Vol.10 No.4

본 연구는 고품질의 퇴비 생산을 목적 으로 건조된 제 지슬러지와 톱밥을 돈분에 혼합하여 합리적인 퇴비화 조건을 도출히기 위해 실행되었다. 돈분은 톱밥과 건 조 제지 슬러지보디 비교적 높은 질소함량으로 인한 낮은 C/N율과 과다한 함수율이 특징이다. 그러므로 건조 제지 슬러지와 톱밥을 첨가하여 퇴 비더미 의 C/N율과 수분함량을 조절하였으며. 퇴비화 방식은 교반정체식을 이용하였다. 퇴비화 초기 흔합된 퇴비더미의 묻리적 특성 때문에 작업성이 용이하지 않았으나 곧 회복되었다 돈분과 톱밥을 혼합한 P-2 처리구(56.6 : 43 .4)는 퇴비화 시작 후 5 일 이내에 퇴비더미의 온도가 60 0C 에 도달했으며, 그 때 P-2 의 수분함량은 58%이었다. 모든 처리구의 pH는 퇴비화 진행과정에서 미약하게 감소하였다. 짧은 퇴비화 기간때문에 T-C와 T-N의 변화는 크지 않았지만 T-C의 감소율은 5~12% 범위였다. 5 개의 돈분 처리구에서 합리적인 퇴비화 조건을 고려하면 최적의 수분함량은 57%이었고 팽화제로써 톱밥을 사용하는 것이 건조 제지슬러지를 처리하는 것보다 퇴비의 품질면에서 우수하였다. This study was conducted to induce the optimal composting conditions of pig manure mixed with sawdllst and dried paper-mill sludge in the composting for ptoduction of high qllality composr. Pig manure contains high water comεm and low C/N ratio because of comparatively high nitrogen coment than sawdust and dried paper-mill sludge. Therefore the addition of dried paper-mill sludge and sawdllst to the raw materials helps controlling the C/N and the water comem of compost pile. The composcing system used in the expenmem was agitated static bed system. The physical properties of the mixed raw materials was nm good at the working conditions in the early stage of composting. The temperature of compost heap reaches at 60 0c within 5 day after staning composting in P-2 treatmenr mixed with pig manure and sawdust(56.6 : 43.4). Then the water comem of P-2 was 58%. The pH in all treatmems werε slowly decreased as the composcing was proceeded. Although the changes ofT-C and T-N were not extended because of the shon composting experimem period. Redllction rates of T -C in treatmems were 5~ 12% without special diffetence. By considering the efficiency of composting in each of fìve treatrnems with pig manure the optimal water contents was abollt 57% level. Mixing a sawdust as a bulking agem was more positive than dried paper-mill sludge from a viewpoim of compost quality.

음식물찌꺼기 고속발효기에 의해 처리된 퇴비의 안정성 검토

김필주(Pil Joo Kim),장기운(Ki Woon Chang),민경훈(Kyoung Hoon Min) 유기성자원학회 1995 유기물자원화 Vol.3 No.1

고속발효 71 에 의해 처리된 음식물찌꺼기 퇴비의 부숙정도를 알아 보기 위해, 고속발효기 두대를 이용하여 추천 운영조건으로 96시간동안 음식불 찌꺼기의 퇴비제조 실험올 실시한 후, 2차적으로 고속발효기를 통해 처리된 처리품을 약 1 루베 규모의 정체식 퇴비화 장치를 이용하여 퇴비화 적정조건으로 재차 퇴비화를 실시하면서 각 단계별로 처리품의 이화학적 특성 및 식물독성올 측정하여 퇴비의 부숙정도를 분석하였다. 고속발효기를 이용한 음식물찌꺼기의 퇴비화시 약 60%정도의 감량효과를 가껴와 취급성이 좋은 처리품올 얻을 수 였였다. 이에 반해 음식물찌꺼기 혼합물의 초기분해만올 도모할 뿐 2-3일만에 완숙퇴비 제조는 불가능하였고, 식물에 시용시 발아억제와 뿌리생장 장해를 유발시켰다. 고속발효기에서 얻어진 처리품을 재차 정체식 퇴비시설을 이용하여 부숙시 최소한 6주 이상 부숙을 시켜야만 완숙된 퇴비로서 이용할 수 있을 것으로 판단되었다. To evaluate the stability of the compost made from food wastes, which were treated in the fermenting tank for 96 hours and then composted additionally in the static pile, physico-chemical properties and phytotoxicities were investigated. When food wastes were treated in the fermenting tank for 96 hours at 55-60.C, there is the effect of decreasing about 60% of total weight and improving the storage and the handling. However, it is impossible to make the matured compost in the fermenting tank within 2-3 days, which is the operating condition recommended by manufacturers. To use compost in the agricultural field , after treating food wastes in the fermenting tank for 2-3 days, it needs to compost additionally in the staic pile under the suitable fermenting condition over 6 weeks.

高等學校 排球選手에 있어서 스포츠傷害의 心理的 要因硏究

민경훈,송채훈,박종남 서강정보대학 1993 論文集 Vol.12 No.-

This study examines the relationship between psychological factors and sport injuries in high school volleyball player and offeris data to improve concentration of team's power. The subjects have collected from 126 high school volleyball players(male:72,female:54) participating The Third Mooduying Cup High School Champianship Volleyball Contest. The factors of this study are A type behavior, locus of control,life event,history of injury, and social support. The results are as follows; 1. Most of all experience three sport injuries, are state of "moderate crisis, and male have more than female in history of injuries. 2. A type behavior, history of injury, and life event scale have an effect to take place sport injury in all players. But other factors are not related to sport injury.