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Biohydrogen production by Thermoanaerobacterium thermosaccharolyticum KKU-ED1: Culture conditions optimization using xylan as the substrate

机译:解热嗜热厌氧杆菌KKU-ED1产生的生物氢:以木聚糖为底物的培养条件优化

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Thermophilic hydrogen production from xylan by Thermoanaerobacterium thermosaccharolyticum KKU-ED1 isolated from elephant dung was investigated using batch fermentation. The optimum conditions for hydrogen production from xylan by the strain KKU-ED1 were an initial pH of 7.0, temperature of 55 °C and xylan concentration of 15 g/L. Under the optimum conditions, the hydrogen yield (HY), hydrogen production rate (HPR) and xyla-nase activity were 120.05 ± 15.07 mL H_2/g xylan, 11.53 ± 0.19 mL H_2/L h and 0.41 units/mL, respectively. The optimum conditions were then used to produce hydrogen from 62.5 g/L sugarcane bagasse (SCB) (equivalent to 15 g/L xylan) in which the HY and HPR of 1.39 ± 0.10 mL H_2/g SCB (5.77 ± 0.41 mL H_2/g xylan) and 0.66 ± 0.04 mL H_2/L h, respectively, were achieved. In comparison to the other strains, the HY of the strain KKU-ED1 (120.05 ± 15.07 mL H_2/g xylan) was close to that of Clostridium sp. strain X53 (125.40 mL H_2/g xylan) and Clostridium butyricum CGS5 (90.70 mL H_2/g xylan hydrolysate).
机译:使用分批发酵技术研究了从象粪中分离的解热嗜热厌氧杆菌KKU-ED1从木聚糖中产生嗜热氢。 KKU-ED1菌株从木聚糖生产氢气的最佳条件是初始pH值为7.0,温度为55°C,木聚糖浓度为15 g / L。在最佳条件下,产氢量(HY),产氢率(HPR)和木聚糖酶活性分别为120.05±15.07 mL H_2 / g木聚糖,11.53±0.19 mL H_2 / L h和0.41单位/ mL。然后使用最佳条件从62.5 g / L甘蔗渣(SCB)(相当于15 g / L木聚糖)制氢,其中HY和HPR为1.39±0.10 mL H_2 / g SCB(5.77±0.41 mL H_2 / g木聚糖)和0.66±0.04 mL H_2 / L h。与其他菌株相比,菌株KKU-ED1的HY(120.05±15.07 mL H_2 / g木聚糖)接近于梭状芽胞杆菌。菌株X53(125.40 mL H_2 / g木聚糖)和丁酸梭菌CGS5(90.70 mL H_2 / g木聚糖水解产物)。

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