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首页> 外文期刊>International journal of hydrogen energy >Enhancing continuous hydrogen production by photosynthetic bacterial biofilm formation within an alveolar panel photobioreactor
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Enhancing continuous hydrogen production by photosynthetic bacterial biofilm formation within an alveolar panel photobioreactor

机译：通过在肺泡板光生物反应器内形成光合细菌生物膜来增强连续产氢

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Photofermentative hydrogen production at higher rate is desirable to make the technology of biological hydrogen production in practical application. An easy fabricating alveolar panel photobioreactor with high surface-to-volume ratio was proposed in this study to realize biofilm formation and used for developing a continuous bioprocess of hydrogen production. Effects of key operating parameters, i.e. variation in intensity of incident light, initial concentration of carbon substrate and flow rate on the rate of nitrogenase-based H-2 production were investigated using response surface methodology (RSM) with Box-Behnken design. Surface and contour plots of the fitted regression model revealed that optimum H-2 production rate of 57.6 mL/h/L was obtained at 125.9 mu E/m(2)/s incident light intensity at 590 nm light wavelength, 52.4 mM initial concentration of carbon substrate and 209 mL/h flow rate. Regular groove surfaces within this photobioreactor were considered to have mutual effects on enhancement of continuous hydrogen production by enriching bacterial cell density, enhancing mass transfer of carbon substrate to facilitate release of protons and electrons, enhancing removal of molecular H-2, and uniformly distribution of incident light within the photobioreactor for sufficient conversion into ATPs. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
机译：为了使生物制氢技术在实际应用中具有较高的速率，光发酵制氢是理想的。本研究提出了一种易于制造的具有高表面体积比的肺泡平板光生物反应器，以实现生物膜形成，并用于发展连续的制氢生物过程。使用具有Box-Behnken设计的响应面方法（RSM），研究了关键操作参数（即入射光强度的变化，碳底物的初始浓度和流速对基于固氮酶的H-2产生速率）的影响。拟合回归模型的表面和轮廓图显示，在590 nm的光波长，初始浓度52.4 mM下的入射光强度为125.9 mu E / m（2）/ s时，最佳H-2生产率为57.6 mL / h / L。碳底物浓度和209 mL / h流速。认为该光生物反应器内的规则凹槽表面通过增加细菌细胞密度，增强碳底物的传质，促进质子和电子的释放，促进分子H-2的去除以及H2的均匀分布，对提高连续产氢量具有相互影响。光生物反应器内的入射光，足以转化为ATP。 （C）2019氢能出版物有限公司。由Elsevier Ltd.出版。保留所有权利。

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