Department of Chemical Engineering, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Pohang 37673, South Korea.
Bioenergy Research Center, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Pohang 37673, South Korea.
Bioresour Technol. 2016 Jul;211:478-85. doi: 10.1016/j.biortech.2016.03.100. Epub 2016 Mar 22.
To utilize waste CO for mixed culture gas fermentation, carbon sources (CO, CO2) and pH were optimized in the batch system to find out the center point and boundary of response surface method (RSM) for higher acetate (HAc) production (center points: 25% CO, 40% CO2, and pH 8). The concentrations of CO and CO2, and pH had significant effects on acetate production, but the pH was the most significant on the HAc production. The optimum condition for HAc production in the gas fermentation was 20.81% CO, 41.38% CO2, 37.81% N2, and pH 7.18. The continuous gas fermentation under the optimum condition obtained 1.66g/L of cell DW, 23.6g/L HAc, 3.11g/L propionate, and 3.42g/L ethanol.
为了利用废 CO 进行混合培养气体发酵，在分批系统中优化了碳源（CO、CO2）和 pH 值，以找出用于生产更高乙酸（HAc）的响应面法（RSM）的中心点和边界（中心点：25% CO、40% CO2 和 pH 8）。CO 和 CO2 的浓度以及 pH 值对乙酸生产有显著影响，但 pH 值对 HAc 生产的影响最大。气体发酵中生产 HAc 的最佳条件为 20.81% CO、41.38% CO2、37.81% N2 和 pH 7.18。在最佳条件下进行连续气体发酵可获得 1.66g/L 细胞干重、23.6g/L HAc、3.11g/L 丙酸和 3.42g/L 乙醇。
