State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China.
Bioresour Technol. 2010 Mar;101(6):2049-52. doi: 10.1016/j.biortech.2009.10.078. Epub 2009 Dec 5.
Enhanced bio-hydrogen production from pretreated corncob by integrating dark-fermentation with photo-fermentation process was investigated in this study. In the first step, the maximum bio-hydrogen yield and rate from corncob by dark-fermentation was 120.3+/-5.2 mL H(2)/g-corncob and 150 mL H(2)/(Lh), respectively. In the second step, a hydrogen yield of 713.6+/-44.1 mL H(2)/g-COD was obtained from digesting the effluent of dark-fermentation by photosynthetic bacteria. Meanwhile, COD removal efficiency achieved 90%. Bio-hydrogen production in the first step was mainly attributed to the bioconversion of the reducing sugars and oligosaccharides in the hydrolyzate of corncob. Bio-hydrogen production in the second step was due to the biodegradation of acetic acid, butyric acid, butyl alcohol and ethanol in the effluent of dark-fermentation.
本研究探讨了在黑暗发酵与光发酵工艺相结合的条件下，从预处理玉米芯中生产生物氢的方法。在第一步中，玉米芯经黑暗发酵的最大生物氢产量和速率分别为 120.3+/-5.2 mL H(2)/g-玉米芯和 150 mL H(2)/(Lh)。在第二步中，从黑暗发酵的废水中通过光合细菌消化获得了 713.6+/-44.1 mL H(2)/g-COD 的氢产量。同时，COD 去除效率达到 90%。第一步中的生物氢生产主要归因于玉米芯水解物中还原糖和低聚糖的生物转化。第二步中的生物氢生产则归因于黑暗发酵废水中乙酸、丁酸、丁醇和乙醇的生物降解。
