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    • 5. 发明公开
    • MICROBIAL CULTURE MEDIUM
    • US20230313256A1
    • 2023-10-05
    • US18003991
    • 2021-07-01
    • LONZA LTD
    • Nuria ADELANTADOHauke HOLMChristoph KIZIAK
    • C12P21/00C12N1/20
    • C12P21/00C12N1/20
    • A method of reducing precipitation in a bacterial fermentation process for producing a fermentation product, which fermentation process comprises the steps:

      a) cultivating the host cells for bacterial growth in a batch phase using a batch medium; and
      b) cultivating the host cells for producing the fermentation product in a fed-batch phase using a feed medium;

      which feed and batch media are each unprecipitated media solutions, wherein:

      i) the batch medium comprises an amount of calcium salts, magnesium salts, phosphate salts and at least one chelating agent, which is a citrate salt and/or citric acid at an amount of at least 5 mM, and/or EDTA at an amount of at least 1 mM; and
      ii) the feed medium comprises an amount of calcium salts which is at least 1 mM, and which is at least 5-fold higher as compared to the batch medium (M/M); and
      iii) the feed medium comprises an amount of magnesium salts which is at least 3 mM, and which is at least 2-fold higher as compared to the batch medium (M/M); and
      iv) the feed medium comprises an amount of phosphate salts which is less than 90% of the amount comprised in the batch medium (M/M).