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임목폐기물의 산 가수분해 후 중화제에 따른 에탄올 제조 비교 분석
조중식 ( Jung-sik Cho ),김광렬 ( Kwang-yul Kim ),주붕비 ( Zhu Pengfei ),조병렬 ( Byung-yeol Cho ),연익준 ( Ik-jun Yeon ) 한국환경기술학회 2015 한국환경기술학회지 Vol.16 No.6
임목폐기물을 이용하여 바이오 에탄올과 같은 고부가 가치 에너지 회수를 위해서는 산 가수분해 후 발효 효모를 접종하기 전에 산 가수분해로 생성된 당화액 중의 잔류 산에 대한 중화가 필요하다. 본 연구에서 임목폐기물의 산 가수분해 후 중화제에 따른 에탄올 생산성을 비교 분석한 결과 중화제로 KOH보다는 Ca(OH)<sub>2</sub>가 우수하며 S. cerevisiae와 Y. stipitis의 에탄올 전환반응 특성을 종합하여 볼 때 에탄올 생산성은 Y. stipitis보다 S. cerevisiae가 더 우수한 것으로 보여 임목 폐기물을 이용한 에탄올 제조 시 중화제로 Ca(OH)<sub>2</sub>와 S. cerevisiae가 더 효율적인 것으로 나타났다. 또한, A(혼합활엽수)보다 B(혼합침엽수)의 에탄올 농도가 높았으며, 이 결과 침엽수가 에탄올 생산에 더 적합할 것으로 판단된다. The neutralization of the residual-acid in wood hydrolyzate produced by the acid- hydrolyzed is required, after the acid-hydrolyzed and before the injection of the yeast fermentation, for high-value energy recovery, such as bio-ethanol using of forest tree waste. In this study, productivity of ethanol by each different neutralizer after the acid- hydrolyzed was compared. As a result, Ca(OH)<sub>2</sub> is better than KOH in the performation of neutralizer. And S. cerevisiae is better than Y. stipitis in the productivity of ethanol from the ethanol conversion characteristics. From the result, as neutralizer, Ca(OH)<sub>2</sub> and S. cerevisiae was effective in ethanol production using the forest waste. Also, the ethanol concentration was higher than A(mixed-broadleaf tree) and B(mixed-needleleaf tree). thus needleleaf is determined to be more suitable for ethanol production.
A Study of Bio-Energy Production using Suspended Wood Waste from Dam
조중식(Cho, Jung-Sik),신수정(Shin, Soo-Jeong),조병렬(Cho, Byung-Yeol),이병찬(Lee, Byung-Chan),이준호(Lee, Jun-Ho),연익준(Yeon, Ik-Jun) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.05
The use of renewable energy sources is becoming increasingly necessary to minimize the problems derived from the global warming impacts caused by the utilization of fossil fuels as well as their limited supply and reservoir. Also, localized heavy rain has occurred in many areas. As a result, suspended wood waste is being inflow into the dam and the problem of waste disposal has occurred. It is a unique renewable and alternative source for the production of energy. The experiment using wood waste (dry weight 25.0g) was conducted for extraction sugars such as xylose, lactose and glucose. For the sugar extraction from wood waste, hydrolysis experiment using wood waste was conducted by two steps. First step was reacted with 72% sulfuric acid (24.0N and 37.5 ml) for 1hr at 30?C and second step was reacted at 105?C for one hour after adding 2.45times of hot water. Extracted sugar was used in the experiment of sugar consumption to estimate feasibility of ethanol production using yeast(P. Stipitis and S cerevisiae). As a result, sugar extracted from wood waste was effective consumed by yeast(P. Stipitis and S cerevisiae). The consumption rate by yeast was S. cerevisiae was faster than that of P. stipitis. It can be confirmed that resource as ethanol production using wood waste was available.
초고층 건축물의 개방형 BIM 적용을 위한 정보환경 구축 기초 연구
김인한(Kim In-Han),최중식(Choi Jung-Sik),조대구(Cho Dae-Gu),추승연(Choo Seung-Yeon),조근하(Cho Geun-Ha) 대한건축학회 2012 대한건축학회논문집 Vol.28 No.2
The interoperability problem among different software applications has been regarded as one of main limitations preventing wide adoption of BIM. Based on the motivation, IFC based open BIM has internationally developed as a solution for the problem. However, despite much interest and effort, the open BIM technologies are rarely introduced to the construction industry and need more technical development for a practical application as well. This paper aims to develop a standard process and guideline for wide adoption of open BIM technologies. The paper has analyzed previous studies related to open BIM applications focusing on super-tall buildings, reviewed required technologies of open BIM, defined information environment such as IDM, MVD, and finally proposed a standard process and guideline using an open BIM application scenario. The proposed standard process and guideline can be expected to improve interoperability among BIM applications and quality of information.
GIS(Geographic Information System) 및 예측기법을 통한 가축사육 현황 분석
정지선 ( Ji-sun Jung ),조중식 ( Jung-sik Cho ),연승원 ( Seoung-won Yeon ),김종표 ( Jong-pyo Kim ),연익준 ( Ik-jun Yeon ),황의진 ( Eui-jin Hwang ) 한국폐기물자원순환학회(구 한국폐기물학회) 2016 한국폐기물자원순환학회 추계학술발표논문집 Vol.2016 No.-
최근 축산업은 육류 소비량 증가 및 정부의 장려 축산정책으로 발전하고 있으며 소규모 축산농가에서 집단화 및 대형화되어 고소득 향상 사업으로 변해가고 있다. 하지만 소득향상이라는 이점 외에 가축사육과정에서 배출되는 분뇨에 의해 각종 민원뿐만 아니라 인근 수계로의 노출로 인한 수질오염과 2차 토양오염, 가축전염병, 해충번식, 폐기물 등 가시적인 환경오염이 발생하고 있다. 따라서 정부는 가축분뇨의 체계적인 관리를 위해 “가축분뇨 관리 및 이용에 관한 법률”을 제정하여 시·군 지역의 가축분뇨관리세부계획을 수립하도록 하였다. 본 연구는 괴산군의 가축분뇨관리세부계획 수립을 위한 것으로 괴산군 지역의 가축사육 및 분뇨발생량 현황을 분석하였고 축종 및 사육두수 분포특성을 확인하기 위해 GIS(Geographic Information System)를 이용하여 분석하였다. ArcMap ver. 9.3을 사용하여 가축사육 주소지를 좌표 변환하였으며, 축종별 사육두수 범위별 분포현황을 조사하였다. 또한 최소자승법과 로그함수법으로 축종별 사육두수 및 가축분뇨 발생량을 예측하여 괴산군 가축분뇨관리세부계획 수립에 적용하고자 하였다.
국내 원전 방사화 콘크리트 구조물 해체공사 리스크 분류체계 구축 : 구조적·인적 리스크를 중심으로
이상렬(Lee, Sang Ryul),문효수(Moon, Hyo Soo),조한광(Cho, Han Kwang),권나현(Kwon, Na Hyun),최중식(Choi, Jung Sik),안용한(Ahn, Yong Han) 한국퍼실리티매니지먼트학회 2021 한국퍼실리티매니지먼트학회지 Vol.16 No.2
Lee, Sang Ryul Moon, Hyo Soo Cho, Han Kwang Kwon, Na Hyun Choi, Jung Sik Ahn, Yong Han Abstract The purpose of this study is to develop a risk breakdown structure by deriving structural and job risks that may occur during the dismantling of radiated concrete structures in nuclear power plants. In order to achieve the purpose, the similarity between nuclear power plant dismantling and construction demolition work was analyzed, and a work breakdown structure was established to derive risk factors for each cutting work type and structural and job risks based on expert interviews. As a result, this study developed a practical risk breakdown structure that can be used when dismantling nuclear power plants.
소나무 뿌리 폐기물을 이용한 목질 펠릿 제조 - 목부와 뿌리로 제조한 펠릿의 특성 비교
신수정(Shin, Soo-Jeong),한규성(Han, Gyu-Seong),명수정(Myeong, Soo-Jeong),조중식(Cho, Jung-Sik),연익준(Yeon, Ik-Jun) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.10
Different biosolid fuel (wood pellet) properties between trunk and root of pine (Pinus densiflora) biomass were investigated. Trunk has more organic solvent extracts and Klason lignin content which has higher heating values than root biomass component. In root biomass, polysaccharides content was higher than trunk biomass. Based on Higher Heating Value (HHD) analysis and ash content, trunk biomass showed better solid fuel characteristics than root biomass. But pine root biomass had lower HHD than trunk biomass, its HHD values were higher than other hardwood or annual plant lignocellulosic biomass.