Kluyveromyces marxianus and use thereof

Abstract

The present invention relates to the technical field of fermentation, and provides Kluyveromyces marxianus and a use thereof. The accession number of Kluyveromyces marxianus is CCTCC No: M2023217. The original strain has good lactic acid resistance and low pH value tolerance. The strain obtained by mutagenesis by using the original strain has organic acid resistance and low pH value tolerance. For example, the original strain can tolerate lactic acid having a concentration of 5.5 wt % and can grow under the condition that the pH value is 2, and particularly, the tolerance of the original strain to lactic acid having a concentration of 4.5 wt % to 5.5 wt % reaches 80%-90%. The original strain can effectively transform lactic acid into microbial proteins, has more efficient lactic acid utilization capacity in corn steep liquor fermentation, can increase the additional value of the corn industry, achieves high-value utilization of low biomass resources, reduces, as an alternative protein, the pressure on environmental resources caused by the traditional breeding industry, meets the protein requirements of global population and the field of feed, and achieves economic development and environmental protection of the fermentation industry.

Dependencies are inferred from the claim text.