The high yield of propionic acid in mixed acid fermentation was the main reason for the low hydrogen production capacity.

混合酸发酵的发酵产物中丙酸含量较高是产氢能力偏低的主要原因。

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An coupling bioprocess for in situ propionic acid recovery coupled with fermentation of vitamin B12 was established based on this technology.

将此工艺用于发酵过程中丙酸的原位吸附分离，建立了维生素b12发酵与丙酸在线分离的耦合过程。

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This suggests that Daidaein can increase the synthesis capacity of ruminal microbial crude protein and alter the rumen fermentation pattern, tend to propionic-type fermentation.

提示，大豆黄酮能提高瘤胃微生物蛋白的合成能力，改善瘤胃的发酵类型，使瘤胃发酵趋于丙酸型。

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