http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : ( Qunhui Wang ) (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
Effect of Fermentation Conditions on L-Lactic Acid Production from Soybean Straw Hydrolysate
( Juan Wang ),( Qunhui Wang ),( Zhong Xu ),( Wenyu Zhang ),( Juan Xiang ) 한국미생물 · 생명공학회 2015 Journal of microbiology and biotechnology Vol.25 No.1
Four types of straw, namely, soybean, wheat, corn, and rice, were investigated for use in lactic acid production. These straws were mainly composed of cellulose, hemicellulose, and lignin. After pretreatment with ammonia, the cellulose content increased, whereas the hemicellulose and lignin contents decreased. Analytical results also showed that the liquid enzymatic hydrolysates were primarily composed of glucose, xylose, and cellobiose. Preliminary experiments showed that a higher lactic acid concentration could be obtained from the wheat and soybean straw. However, soybean straw was chosen as the substrate for lactic acid production owing to its high protein content. The maximum lactic acid yield (0.8 g/g) and lactic acid productivity (0.61 g/(l/h)) were obtained with an initial reducing sugar concentration of 35 g/l at 30°C when using Lactobacillus casei (10% inoculum) for a 42 h fermentation period. Thus, the experimental results demonstrated the feasibility of using a soybean straw enzymatic hydrolysate as a substrate for lactic acid production.
-
Phenol removal via activated carbon from co-pyrolysis of waste coal tar pitch and vinasse
Ming Gao,Xiaona Wang,Changlei Xia,Na Song,Yuhui Ma,Qunhui Wang,Tianxue Yang,Shengbo Ge,Chuanfu Wu,Su Shiung Lam 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.1
The behavior and characteristics of phenol adsorption by activated carbon produced from co-pyrolysis of coal tar pitch and vinasse were investigated. Coal tar pitch and vinasse (mass ratio of 1 : 3) were firstly co-pyrolyzed and carbonated at 400 oC for 2 h. The carbonized material produced was then soaked with saturated KOH solution and activated at 800 oC for 1 h to form activated carbon. Results from the phenol wastewater adsorption experiments suggest that pseudo-second-order kinetics and the Weber-Morris model could reflect the time-dependent adsorption behavior of phenol wastewater by the activated carbon, revealing that internal diffusion represents the rate-limiting procedure and dominant process to control the adsorption rate in the early stage of the adsorption. Monolayer adsorption played the key role during the phenol adsorption. The adsorption was an endothermic reaction in temperature ranging from 15 oC to 35 oC, indicating that the adsorption speed could be stimulated by the increasing temperature. This study establishes a theoretical foundation for the usage and the potential application of the activated carbon derived from coal tar pitch and vinasse in wastewater treatment.
-
Semi-solid State Fermentation of Food Waste for Production of Bacillus thuringiensis Biopesticide
Wenyu Zhang,Hui Zou,Lin Jiang,Juejun Yao,Jing Liang,Qunhui Wang 한국생물공학회 2015 Biotechnology and Bioprocess Engineering Vol.20 No.6
In this study, Bacillus thuringiensis (Bt) biopesticide was produced through different fermentation processes using food waste with different water contents. The semi-solid state sample with 75% water content presented the highest δ-endotoxin efficiency of 862 μg/mL. δ-endotoxin efficiency increased by 30.2% from that of the solid-state sample (50% water content) and 73.8% from that of the submerged sample (99% water content). Results confirmed that semi-solid state fermentation presents considerable advantages compared with other fermentation types (solid-state and submerged). The timing adjustment of pH and recycling fermentation effectively counteracted the inhibition of pH and product, thereby increasing δ- endotoxin efficiency to 1,648 and 2,478 μg/mL (accumulated value of all four fermentation loops), respectively. A δ- endotoxin slow-release formulation using polylactic acid as the carrier was also developed to effectively promote the stability of Bt biopesticide.
ScienceON
KISS연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
