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바이오에탄올 생산을 위한 산림 부산물(폐목재)로부터의 효율적인 당 추출
조중식,정영도,김광렬,조병렬,연익준 한국폐기물자원순환학회 2014 한국폐기물자원순환학회지 Vol.31 No.8
Forest waste was interested as biomass to produce new renewable energy among various materials. To find appropriate conditions of the bio-ethanol production, acid hydrolysis and glucose fermentation experiments were conducted under various conditions. The acid-hydrolysis experiment results show that yield of glucose were increased as raise of temperature, acid concentration and reaction time. As a result, the optimal conditions for producing glucose from forest waste was under 110oC, 35%, and 100 min, respectively. The yield of glucose, which was generated from acid-hydrolysis experiment, was 2.419 mg/g·g from softwood and was 1.192 mg/g·g from hardwood. Also, it was investigated that acetic acid was more efficient than sulfuric acid for acid-hydrolysis process.
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.
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.
조병렬,조중식 忠州大學校 2008 한국교통대학교 논문집 Vol.43 No.-
We analyzed the management index of municipal waste for MBT. The results found out in this study as follows. 1) As a result of computation, the generated quantity of muncipal waste between 1996 and 2005 increased in Cheongju city, but decreased in Chungju city and Jecheon city. 2) The recycling resource after 2000yr decreased according to the management index of municipal waste for MBT.
바이오에탄올 생산을 위한 산림 부산물(폐목재)로부터의 효율적인 당 추출
조중식,정영도,김광렬,조병렬,연익준 한국폐기물자원순환학회 2014 한국폐기물자원순환학회지 Vol.31 No.8
Forest waste was interested as biomass to produce new renewable energy among various materials. To find appropriate conditions of the bio-ethanol production, acid hydrolysis and glucose fermentation experiments were conducted under various conditions. The acid-hydrolysis experiment results show that yield of glucose were increased as raise of temperature, acid concentration and reaction time. As a result, the optimal conditions for producing glucose from forest waste was under 110oC, 35%, and 100 min, respectively. The yield of glucose, which was generated from acid-hydrolysis experiment, was 2.419 mg/g·g from softwood and was 1.192 mg/g·g from hardwood. Also, it was investigated that acetic acid was more efficient than sulfuric acid for acid-hydrolysis process.
조중식 ( Jung Sik Jo ),박명렬 ( Myoung Ryoul Park ),윤성중 ( Song Joong Yun ) 전북대학교 농업과학기술연구소 2009 농업생명과학연구 Vol.40 No.2
건전한 어린모 육묘를 위한 유묘 초기의 무기양분 공급 필요성을 평가하기 위하여 발아 및 유묘 생육초기의 양분 결핍이 유묘 생육에 미치는 영향을 다산벼를 이용하여 조사하였다. 양분 결핍처리는 Yoshida액을 사용하여 질소, 인산, 칼륨, 칼슘, 철 등의 단일성분 결핍처리와 증류수를 이용한 모든 양분 결핍처리를 실시하였다. 양분 결핍처리를 발아시 또는 발아 5일후부터 5-10일동안 처리하여 유묘의 주요 생육형질을 조사 분석하였다. 양분 결핍에 의해 유묘의 초장, 생체중, 지상부생체중, 근장, 근생체중 등이 현저히 감소하였다. 유묘생육 저해정도는 질소 결핍구, 철분 결핍구, 모든 양분 결핍구에서 더욱 컸다. 유묘의 생육은 발아개시기보다는 유묘초기의 양분 결핍에 의해 더 감소되었다. 이상의 결과는 주요 무기 양분이 발아과정에는 미미한 영향을 주나, 유묘의 생육에는 크게 영향을 미치며, 특히 질소와 철분의 영향이 큰 것을 의미한다. 그러므로 건묘육성을 위해서는 유묘종자의 배유양분이 소진되기 이전의 유묘초기에 질소 및 철분 등 무기양분의 공급이 필요한 것으로 판단된다. Infant seedling transplanting outweighs direct seeding in stability, productivity, and product quality of rice cultivation though it requires intensive management in seedling nursery. This study was conducted to identify key mineral nutrients for the production of quality infant seedlings by analyzing the effects of mineral nutrients deficiency on early seedling growth. Deficiency of N, P, K, Ca, Fe, or all nutrients was induced by using Yoshida`s nutrient solution for up to 10 days from germination or 5 days after germination in Dasanbyeo. Seedling height and fresh weight, shoot fresh weight, root number, root length, and root fresh weight were decreased by deficiency of the nutrients, but most severely by N or Fe deficiency. This result demonstrates the relatively greater importance of N and Fe than other nutrients in early seedling growth. Seed germination was little affected by any nutrient. The results indicate that additional supply of nutrients should be considered based on the nutrients levels of nursery soil for quality seedling production.