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가축분뇨 소화효율 증대를 위한 병합혐기성소화 특성 평가
정재훈 ( Jae-hoon Jeung ),김도영 ( Do-yong Kim ),정우진 ( Woo-jin Chung ),장순웅 ( Soon-woong Chang ) 한국폐기물자원순환학회(구 한국폐기물학회) 2021 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2021 No.-
본 연구에서는 가축분뇨의 혐기성소화 효율을 증대시키기 위해 농업부산물 및 폐사축을 혼합한 병합 혐기성 소화에 대한 연구를 수행하였다. 연구는 BMP test의 형태로 수행되었으며, 각 원료의 혼합 비율별 바이오가스 발생량 및 메탄수율을 산정하여 소화효율을 평가하였다. 가장 높은 효율을 나타낸 것은 0.84 ㎥CH<sub>4</sub>/kgVS로 세 가지 원료가 균등하게 섞인 혼합비율에서 나타났으며, 타 혼합 원료에서도 가축분뇨 단일 소화와 비교하여 메탄수율이 1.03-1.29배 증가한 것으로 확인되었다.
정재훈 ( Jae-hoon Jeung ),이시진 ( Si-jin Lee ) 한국폐기물자원순환학회 2021 한국폐기물자원순환학회지 Vol.38 No.6
In this paper, we studied the efficiency of reducing sulfur inhibition during anaerobic digestion using biochar. The study was conducted using a batch test called the biochemical methane potential test in which various concentrations of Na2S were injected to determine the effects of sulfur. This experiment used leached food wastewater as the feedstock, and the composition of the experiment was divided into three sets; In Set 1, only Na2S was injected except for control, based on sulfur concentration (20-1,000 mg/L). In Set 2, biochar (BC, 5 g/L) were additionally injected to the Set 1 conditions. For comparison, FeCl<sub>3</sub> (24 g/ L) was injected together with Na<sub>2</sub>S in Set 3. The experiment indicated that overall the concentration of H<sub>2</sub>S in the generated biogas was significantly lower than that of other sets in Set 3 (injected with FeCl<sub>3</sub>). Furthermore, the concentration of H2S in Set 2 (injected with biochar) was found to be lower than that of Set 1 in the low-concentration range of Na<sub>2</sub>S. However, there was no significant difference from Set 1 in the high concentration range of Na<sub>2</sub>S. This result indicates that biochar can reduce the inhibition of sulfur; however, the efficiency decreases as the concentration increases. Furthermore, Set 3 yielded lower methane compared to the other sets, where the lowest biogas yield and methane yield were found to be 200+Fe in Set 3 as 0.046 m<sup>3</sup>/kgVS and 0.021 m<sup>3</sup>/kgVS, respectively. On the other hand, the highest biogas yield and methane yield were found to be 25+BC in Set 2 as 0.308 m<sup>3</sup>/kgVS and 0.166 m<sup>3</sup>/kgVS, respectively. This result indicates that Fe can reduce the effects of sulfur; however, it cannot enhance the efficiency of biogas production. Meanwhile, biochar has been seen to enhance both sulfur control and biogas production efficiency and hence can be used as a valuable material.
정재훈 ( Jae-hoon Jeung ),이시진 ( Si-jin Lee ),정성엽 ( Seong-yeob Jeong ),( Nguyen Dinh Duc ),박헌수 ( Hun-su Park ),김정환 ( Jung-hwan Kim ),장순웅 ( Soon-woong Chang ) 한국폐기물자원순환학회(구 한국폐기물학회) 2017 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2017 No.-
화석연료의 고갈로 인한 고유가 상황과 온실가스에 의한 지구온난화가 가시화 되면서 재생 가능한 에너지 개발과 자원의 효과적인 이용을 통한 자원순환사회 구축, 나아가 친환경적인 사회구현이라는 목표를 달성하기 위하여 선진국을 중심으로 환경과 에너지 문제를 해결하기 위한 연구가 진행되어 왔다. 이러한 전망을 토대로 국가적 부담을 최소화하고 실리를 추구할 수 있는 적극적이고 능동적인 대처방안을 강구할 필요성이 절실한 시점이다. 최근 신재생에너지의 확충과 기후변화 협약에 대한 적극적인 대응이 요구됨에 따라 단순 매립되던 폐기물을 에너지로 전환하여 처리하는 방식이 각광받으며 정부 계획 하에 적극적으로 추진되고 있다. 이러한 대응의 일환으로 1990년대 후반에는 유렵을 중심으로 연성에너지 체제에 부합하면서 지방자치단체 지역 공동체, 지역 주민들의 에너지 생산 활동 참여를 중시하는 지역에너지 체제가 대안으로 제시되었다. 에너지자립마을은 화석연료에 대한 의존도가 낮으며 지속가능한 마을과 유사한 것으로, 환경문제와 미래에너지 문제를 함께 고려한 개념으로 마을에서 발생되는 자원을 최대한 이용하고, 그 자원을 순환시키는 마을로 이해될 수 있다. 국내에서 2009년부터 농림수산식품부, 환경부, 지식경제부 등 정부부처가 합동으로 각종 바이오매스를 이용하여 에너지 자립형 마을 시범사업을 추진하면서 축산 바이오매스를 이용하는 바이오가스화 기술은 농촌 지역에 도입할 수 있는 가장 실행 가능한 기술로 평가받고 있다. 본 연구에서는 농촌형 에너지자립마을에서 발생될 수 있는 다양한 유기성폐기물을 대상으로 혼합 원료의 특성과 병합 혐기성소화의 효율을 평가하기 위하여 biochemical methane potential test(BMP test)를 진행하였다. 또한, 본 연구를 바탕으로 혐기성소화와 C/N비의 관계를 알아보고자 하였다.
문대헌 ( Dea Hyun Moon ),정재훈 ( Jae Hoon Jeung ),장순웅 ( Soon Woong Chang ) 한국환경과학회 2016 한국환경과학회지 Vol.25 No.2
In this study the optimum conditions for recovery of valuable metal in Electric Arc Furnace Dusts were investigated. 2M of H2SO4, 1~5 of solid/liquid ratio, 0~180 min of leaching time has been established for leaching condition, and for electrowinning, each of Pt, C, Zn, Pb anode and Zn, Cu cathode was compared respectively at pH 2, 4 and 6. The result of elemental analysis of Zn crystal, a lagre quantity of Fe and H has been observed with Zn and other heavy metal, therefore, impurities removing process would be requir for enhancing purity of Zn. As the result, about 60% of Zn has been recovered under condition of 2 M of H2SO4, 1:2 of S/L ratio at 120 min, and Pt or Pb for anode, Zn for cathode has been shown the highest efficiency of electrowinning at pH 6.
한국인의 비만형 인슐린비의존성 당뇨병 발생기전에 있어서 β₃아드레날린 수용체 유전자 다형성의 의의
고은미(Eun Mi Koh),안규정(Kyu Jeung Ahn),김경아(Kyoung Ah Kim),김연선(Yeun Sun Kim),정재훈(Jae Hoon Choung),민용기(Young Ki Min),이명식(Myung Shik Lee),이문규(Moon Kyu Lee),김종원(Joung Won Kim),김광원(Kwang Won Kim),김성운(Sung Woon 대한내과학회 1997 대한내과학회지 Vol.53 No.6
N/A Objectives : The β₃adrenergic receptor(β₃-AR) may play an important role in the regulation of energy expenditure and lipolysis. A mutation of the β₃- AR gene(Trp64Arg) has been reported to be associated with early onset of non-insulin dependent diabetes mellitus(NIDDM), obesity and syndrome X which are related with insulin resistance. It is well known that Korean NIDDM patients, in contrast to Caucasians, are mainly non-obese and have experienced severe weight loss during the course of disease. We studied the frequency of the mutation in Korean NIDDM patients and non-diabetics control and evaluated the clinical characteristics of Korean obese NIDDM patients. We investigated the frequency of the mutation in NIDDM patients and clinical characteristics of the patients with the mutation in order to elucidate the significance of the mutation in the pathogenesis of NIDDM in Koreans. Methods: We studied 401 NIDDM patients and 99 controls. The NIDDM patients were divided into two groups, non-obese group and obese group, according to their body mass index at diagnosis of the disease. The Trp64Arg mutation was detected by the PCR/RFLP method using restriction enzyme Mva I. Results: The Trp64Arg allele frequency(16M) of NIDDM did not differ from that(16%) of controls. Although the mutant allele frequency was not different between non-obese and obese group both in NIDDM patients and controls, the frequency of patient with the mutant allele was significantly higher in obese NIDDM patients than in non-obese NIDDM patients(38.5% vs. 26.9%, P=0.04). However, no significant differences were found in clinical and laboratory findings between the NIDDM patients with the mutant allele and those without the mutant allele. Conclusion: These data suggest that β³-AR mutation might be associated with Korean obese NIDDM, and other factors might also be associated with the development of obesity and insulin resistance in NIDDM patients.