水力停留时间对复合式厌氧折流板反应器乙醇型发酵制氢系统的影响

水力停留时间(HRT)是厌氧生物制氢工艺的重要工程参数.以红糖废水为底物,研究了HRT对复合式厌氧折流板反应器(HABR)作为乙醇型发酵制氢系统产氢效能的影响.结果表明,在设定的8~36 h范围内的5个HRT中,当HRT为12 h时,HABR制氢系统的效果最佳,产氢速率为13.86 mmol·(h·L)-1,COD去除率为51.51%,五格室的pH值在4.22~4.47之间,液相主要产物为乙醇和乙酸,第1~5格室乙醇和乙酸的比值分别为1.90、1.94、1.80、1.77、1.91,最佳能量生产为11.11 kJ·(h·L)-1.

Influences of Hydraulic Retention Time on the Ethanol Type Fermentation Hydrogen Production System in a Hybrid Anaerobic Baffled Reactor

Effect of hydraulic retention time (HRT) on bio-hydrogen production and operational stability of ethanol-type fermentation was investigated in a hybrid anaerobic baffled reactor (HABR) using brown sugar as substrate. The results showed that five HRTs were examined, ranging from 8 to 36 h. At a HRT of 12 h, the highest hydrogen production rate was achieved 13.86 mmol·(h·L)^-1], with a COD remove rate of 51.51%, and the pH value of five compartments was between 4.22-4.47.The ethanol and acetate were the predominant metabolites. The ratios of ethanol and acetic acid from the 1^th compartment to the 5^th compartment were 1.90, 1.94, 1.80, 1.77 and 1.91, respectively. The results demonstrated that the best energy production rate was 11.11 kJ·(h·L)^-1, occurred at a HRT of 12 h.