A cultivation technique for E-coli fed-batch cultivations operating close to the maximum oxygen transfer capacity of the reactor

Research output: Contribution to journalArticle


A cultivation strategy combining the advantages of temperature-limited fed-batch and probing feeding control is presented. The technique was evaluated in fed-batch cultivations with E. coli BL21(DE3) producing xylanase in a 3 liter bioreactor. A 20% increase in cell mass was achieved and the usual decrease in specific enzyme activity normally observed during the late production phase was diminished with the new technique. The method was further tested by growing E. coli W3110 in a larger bioreactor (50 l). It is a suitable cultivation technique when the O-2 transfer capacity of the reactor is reached and it is desired to continue to produce the recombinant protein.


Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Industrial Biotechnology
  • Control Engineering
Original languageEnglish
Pages (from-to)983-990
JournalBiotechnology Letters
Issue number14
Publication statusPublished - 2005
Publication categoryResearch