A fully online sensor-equipped, disposable multiphase microbioreactor as a screening platform for biotechnological applications

Susanna Lladó Maldonado, Peter Panjan, Shiwen Sun, Detlev Rasch, Adama M. Sesay, Torsten Mayr, Rainer Krull*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A new disposable, multiphase, microbioreactor (MBR; with a working volume of 550 μl) equipped with online sensors is presented for biotechnological screening research purposes owing to its high-throughput potential. Its design and fabrication, online sensor integration, and operation are described. During aerobic cultivation, sufficient oxygen supply is the most important factor that influences growth and product formation. The MBR is a microbubble column bioreactor (μBC), and the oxygen supply was realized by active pneumatic bubble aeration, ensuring sufficient volumetric liquid-phase mass transfer (k L a) and proper homogenization of the cultivation broth. The μBC was equipped with miniaturized sensors for the pH, dissolved oxygen, optical density and glucose concentration that allowed real-time online monitoring of these process variables during cultivation. The challenge addressed here was the integration of sensors in the limited available space. The MBR was shown to be a suitable screening platform for the cultivation of biological systems. Batch cultivations of Saccharomyces cerevisiae were performed to observe the variation in the process variables over time and to show the robustness and operability of all the online sensors in the MBR.

Original languageEnglish
Pages (from-to)65-75
Number of pages11
JournalBiotechnology and Bioengineering
Issue number1
Publication statusPublished - 1 Jan 2019


  • biosensor
  • microbioreactor (MBR)
  • optical sensor
  • real-time online analytics
  • screening platform
  • sensor integration

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology

Cite this