厌氧序批式反应器产氢

以啤酒厂废水处理厂UASB中的厌氧污泥为种泥,葡萄糖为基质,研究了厌氧序批式反应器产氢。控制反应器内pH为4.0～4.5,温度为（36±1）℃,水力停留时间为8 h,当进水葡萄糖浓度为4 000 mg/L,容积负荷为12 kg/（m3.d）条件下,该厌氧序批式反应器实现了连续高效厌氧产氢。生物气中的氢气含量约为48%～53%,基质产氢率为1.1 mol/mol葡萄糖,COD去除率为15%～25%,最大比产氢速率为84.5 mol/（kg VSS.d）。液相末端发酵产物中乙醇和乙酸的含量占液相末端发酵产物总量的80%以上,表明该反应器内进行的是乙醇型发酵厌氧产氢。厌氧序批式反应器完全可以实现连续高效厌氧产氢,比较适用于日处理量较小的高浓度含糖废水。

Hydrogen production by an anaerobic sequencing batch reactor （ASBR）

Using anaerobic sludge from a UASB of the brewery wastewater treatment plant in Xi’an as seeding sludge and glucose as substrate,hydrogen production was investigated in an ASBR.Results show that steady hydrogen production in the ASBR obtained under the operating conditions of pH value of 4.0~4.5,temperature of（36±1）℃,HRT of 8 h,influent glucose concentration of 4 000 mg/L and organic loading rate of 12 kg/（m3·d）,respectively.Concentration of hydrogen in the biogas produced was about 48%~53% in proportion.The maximum hydrogen producing rate was 1.1 mol per mol of glucose,COD removal rate between 15% and 25%,and the maximum specific hydrogen producing rate 84.5 mol/（kg VSS·d）.Ethanol fermentation was established in the ASBR with that ethanol and acetic acid in the fermentative end products accounted for more than 80%.It implies that the ASBR may be suitable for carbohydrate wastewater treatment in small scale.