光合菌群利用丁酸产氢的初步研究

Preliminary study on hydrogen production from butyrate by photosynthetic bacteria group

对影响光合菌群利用丁酸产氢的主要因子:初始细胞浓度、温度、初始pH值、光照强度和丁酸浓度进行了研究.结果表明,光合菌群在初始细胞浓度0.2～0.3 g/L,温度30～40℃,pH 6.0～9.0,光照强度2000～8000 Lx,丁酸浓度6～30 mmol/L的范围内均可以保持较高的产氢效率.当初始细胞浓度为0.3 g/L、温度30℃、初始pH 7.0、光照强度为4000 Lx、丁酸浓度为30 mmol/L时该光合菌群具有最大产氢量364 mL,最大产氢效率5.4 mol-H_2/mol-丁酸和最大产氢速率22.2 mL/L/h.

The factors affecting hydrogen production from butyrate by photosynthetic bacteria group, such as initial ceil concentration, temperature, initial pH value, light intensity and butyrate concentra- tion were investigated. The results showed that photosynthetic bacteria group maintained high produc- tion efficiency when initial cell concentration was between 0.2 and 0.3 g/L, temperature was 30-40 ℃, initial pH value was in the range of 6.0- 9.0, light intensity was 2000-8000 Lx and initial butyrate concentration was 6-30 mmol/L. The maximum cumulative hydrogen production quantity of 364 mL, maximum hydrogen yield of 5.4 mol-H2/mol-butyrate, maximum hydrogen production rate of 22.2 mL/ L/h were obtained when initial cell concentration, temperature , initial pH value, light intensity and butyrate concentration were 0.3 g/L, 30 ℃, 7.0, 4000 Lx ond 30 mmol/L, respectively.