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首页> 外文期刊>Journal of Chemical Technology & Biotechnology >Effect of inorganic phosphate on lactate production by Lactobacillus helveticus grown on supplemented whey permeate
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Effect of inorganic phosphate on lactate production by Lactobacillus helveticus grown on supplemented whey permeate

机译：无机磷酸盐对补充乳清渗透物生长的瑞士乳杆菌生产乳酸的影响

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摘要

For batch culture of lactic acid bacteria, seed cultures have to the highly supplemented with complex substrates to obtain an active inoculum. In contrast, for industrial applications, nitrogen supplementation of the fermenter culture must be kept low to minimize costs. Addition of the inorganic phosphate, a low cost component, to the medium increased the lactic acid production rate(40% for media supplemented with 2g dm~(-3) yeast extract), but had no effect on growth rate. This effect was absent for high-nitrogen supplemented medium (20 g dm~(-3) yeast extract), but had no effect on growth rate. This effect was absent for hgih-nitrogen supplemented medium (20 g dm~(-3) yeast extract), because of the lack of phosphorus limitation.
机译：对于乳酸菌的分批培养，种子培养必须高度补充复杂的底物以获得活性接种物。相反，对于工业应用，发酵罐培养物的氮补充必须保持低水平以使成本最小化。向培养基中添加低成本成分的无机磷酸盐可提高乳酸生产速度（对于添加2g dm〜（-3）酵母提取物的培养基，其乳酸生产速度提高了40％），但对生长速度没有影响。高氮补充培养基（20 g dm〜（-3）酵母提取物）没有这种作用，但对生长速率没有影响。由于缺乏磷的限制，因此在添加hgih-氮的培养基（20 g dm〜（-3）酵母提取物）中没有这种效果。

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