Kim S-H, Han S-K, Shin H-S
Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, South Korea.
Water Sci Technol. 2005;52(10-11):23-9.
This study was conducted to compare the performance of a continuous-flow stirred-tank reactor (CSTR) and an anaerobic sequencing batch reactor (ASBR) for fermentative hydrogen production at various substrate concentrations. Heat-treated anaerobic sludge was utilized as an inoculum, and hydraulic retention time (HRT) for each reactor was maintained at 12 h. At the influent sucrose concentration of 5 g COD/L, start-up was not successful in both reactors. The CSTR, which was started-up at 10 g COD/L, showed stable hydrogen production at the influent sucrose concentrations of 10-60 g COD/L during 203 days. Hydrogen production was dependent on substrate concentration, resulting in the highest performance at 30 g COD/L. At the lower substrate concentration, the hydrogen yield (based on hexose consumed) decreased with biomass reduction and changes in fermentation products. At the higher substrate concentration, substrate inhibition on biomass growth caused the decrease of carbohydrate degradation and hydrogen yield (based on hexose added). The ASBR showed higher biomass concentration and carbohydrate degradation efficiency than the CSTR, but hydrogen production in the ASBR was less effective than that in the CSTR at all the substrate concentrations.
本研究旨在比较连续流搅拌槽式反应器（CSTR）和厌氧序批式反应器（ASBR）在不同底物浓度下发酵产氢的性能。采用经热处理的厌氧污泥作为接种物，每个反应器的水力停留时间（HRT）保持在12小时。在进水蔗糖浓度为5 g COD/L时，两个反应器的启动均未成功。在10 g COD/L启动的CSTR在进水蔗糖浓度为10 - 60 g COD/L时，在203天内表现出稳定的产氢。产氢取决于底物浓度，在30 g COD/L时性能最佳。在较低底物浓度下，氢气产率（基于消耗的己糖）随着生物量减少和发酵产物变化而降低。在较高底物浓度下，底物对生物量生长的抑制导致碳水化合物降解和氢气产率（基于添加的己糖）下降。ASBR的生物量浓度和碳水化合物降解效率高于CSTR，但在所有底物浓度下，ASBR的产氢效果均不如CSTR。
