http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
생물화공 에너지 / 환경 : 미세조류의 이산화탄소 고정화에 미치는 이산화탄소 농도의 영향
윤영상(Yeoung Sang Yun),박종문(Jong Moon Park),(Bohumil Volesky) 한국화학공학회 1999 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.37 No.5
Batch cultivation of Chlorella vulgaris was carried out under various CO₂concentrations in order to understand and describe mathematically the CO₂inhibition of microalgal CO₂fixation. The volumetric CO₂transfer coefficient from mixture gas to culture medium was estimated from the volumetric O₂transfer coefficient obtained experimentally. Using this transfer coefficient and aquatic equilibrium relationship between dissolved inorganic carbons, the behavior of dissolved CO₂was calculated during microalgal culture. When air containing 0.035%(v/v) CO₂was supplied into microalgal culture, the fixation rate was limited by CO₂transfer rate. However, the limitation was disappeared by supplying mixture gas containing above 2%(v/v) CO₂and the dissolved CO₂concentration was maintaind at the saturated value. In the range of CO₂partial pressure in the flue gases from thermal power stations and steel-making plants, the microalgal CO₂fixation rate was inhibited. The CO₂fixation rate was successfully formulated by a new empirical equation as a function of dissolved CO₂concentration, which could be useful for modeling and simulating the performance of photobioreaction with enriched CO₂. Also, it was found that the CO₂inhibition of microalgal CO₂fixation was reversible and that micoalgal CO₂fixation process could be stable against a shock of unusually high CO₂concentration.
In Seob Kwak,Yeoung-Sang Yun,원성욱,Sun Beom Choi,Juan Mao,김석,정봉우,윤영상 한국화학공학회 2011 Korean Journal of Chemical Engineering Vol.28 No.3
The removal and recovery of nickel(II) from wastewater of an electroplating factory was investigated using the waste Escherichia coli biomass as the biosorbent. The results were compared with those from using Amberlite IRN-150 as a commercial sorbent resin. The resin showed better performance with a qmax value of 30.48 mg/g compared to 26.45 mg/g for the biomass, as predicted by the Langmuir isotherm model. Kinetic experiments revealed that the biosorption equilibrium was attained within 15 min. In the recycling of the sorbents, the desorption of nickel(II) from Amberlite was only 50%, which is too low for the adsorption performance of the resin to be maintained at an economic level in subsequent cycles. In contrast, the biomass exhibited reasonable adsorption-desorption performance over three repeated cycles. The capability for repeated use of the sorbent over several cycles and for recovery of the metal ions is the main advantage of the waste biomass.
서은옥(Eun-Ok Seo),최은오(Eun-Oh Choi),윤영상(Yeoung-Sang Yun),정봉우(Bong-Woo Chung) 동아시아식생활학회 2008 동아시아식생활학회지 Vol.18 No.1
White bread containing lotus root powder was previously reported as unsatisfactory with respect to appearance and chewiness. In this research, white bread samples were prepared using ethanol(2 wt.%) and lotus root powder(3, 6, or 9 wt. %), and compared to those prepared without ethanol (reference breads). The volumes and heights of the reference breads increased with increasing lotus root powder content. The moisture contents of the breads prepared with ethanol were higher than those of the corresponding reference breads. The hardness and fracturability of the breads made with ethanol were lower than those of the reference breads; however, springiness, cohesiveness, adhesiveness and chewiness were enhanced. In terms of appearance and sensory qualities, optimum results were obtained when the ethanol was added along with 6 wt. % lotus root powder. Overall, the results indicate that adding ethanol can improve the quality of white breads that contain lotus root powder.