Effect of shear velocity on dark fermentation for biohydrogen production using dynamic membrane.,Bioresource Technology

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Effect of shear velocity on dark fermentation for biohydrogen production using dynamic membrane.
Bioresource Technology ( IF 9.7 ) Pub Date : 2020-03-30 , DOI: 10.1016/j.biortech.2020.123265
Young-Bo Sim ₁ , Ju-Hyeong Jung ₁ , Jong-Hun Park ₁ , Péter Bakonyi ₂ , Sang-Hyoun Kim ₁

Affiliation

This study examined the effect of shear velocity on biohydrogen producing dynamic membrane bioreactor (DMBR) containing 50 µm polyester mesh as supporting material. Increase of shear velocity up to 6.75 m/h enhanced hydrogen production performance as well as biomass retention in both suspended and attached forms, while wash-out was found at a shear velocity of 11.69 m/h. The highest average HPR, HY, suspended biomass, and attached biomass were 26.56 ± 1.49 L/L-d, 1.78 ± 0.10 mol H2/mol glucoseadded, 9.99 ± 0.11 g VSS/L, and 8.82 g VSS/L, respectively, at a shear velocity of 6.75 m/h. Flux balance analysis showed homoacetogenic pathway decreased at the shear velocity of 4.70 m/h with the increase of hydrogen yield based on consumed substrate. The highest copy numbers of Clostridium butyricum was found at the optimum shear velocity. Shear velocity would be a critical operational criteria for continuous biohydrogen production using DMBR.

中文翻译：

剪切速度对动态膜暗发酵发酵生产生物氢的影响。

这项研究研究了剪切速度对以50 µm聚酯网为支撑材料的生物制氢动态膜生物反应器（DMBR）的影响。将剪切速度提高到6.75 m / h可以提高制氢性能以及悬浮形式和附着形式的生物量保留能力，而在11.69 m / h的剪切速度下发现洗出。在剪切机上，最高的平均HPR，HY，悬浮的生物量和附着的生物量分别为26.56±1.49 L / Ld，1.78±0.10 mol H2 / mol葡萄糖，9.99±0.11 g VSS / L和8.82 g VSS / L。速度为6.75 m / h。通量平衡分析表明，基于消耗的底物，在4.70 m / h的剪切速度下，同质产乙酸途径减少，而氢气产量增加。在最佳剪切速度下发现了丁酸梭菌的最高拷贝数。

更新日期：2020-03-30

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