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Bioprocessing in Food and Feed

Efficient fermentation process development and scale-up

Microorganisms are routinely used in the food and animal feed industries for processes such as alcohol fermentation, the acidification of dairy products or ensilage. Besides, bacteria and fungi are gaining popularity in the production of food additives such as vitamins, antioxidants or bioactive peptides.

Introduction to Bioprocessing

For decades, bioprocessing has been used for the industrial production of beverages as well as for the production and preservation of food and feed ingredients. But also for the production of new food and feed additives, functional foods and various types of novel foods bioprocessing has proven its value. In the literature, there are many interesting examples of how researchers tackle the challenges in food and feed applications.

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Microbial fermentation

E. coli fermentation in controlled, stirred-tank bioreactors can deliver very high cell densities and product yields. The process outcome not only depends on the medium composition and the bacterial strain, but also on the used bioprocess control strategies. The short protocol on E. coli cultivation shows which steps have to be taken during the preparation and conduction of a bioprocess run in a DASbox® Mini Bioreactor System or in DASGIP® Parallel Bioreactor Systems.

Process Development for Silage Inoculants

Researchers at BIOMIN® Research Center used a DASGIP® Parallel Bioreactor System for process development of a Lactobacillus sp. fermentation as silage inoculant.

Strain and process characterization

The development of high-throughput processes for the genetic modification of microorganisms increases the number of potential product candidates that must be analyzed with respect to their suitability for the production of proteins.

Researchers at BIOMIN® Research Center used a DASGIP® Parallel Bioreactor System for process development of a Lactobacillus sp. fermentation as silage inoculant


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Scale-down

Advanced mini bioreactor systems can harmonize operations between development and production groups while supporting the aims of Quality by Design (QbD) . To meet today‘s demands of process development these systems need to mimic all aspects of large-scale fermentation, and offer comprehensive data and information management tools to support regulatory requirements for both filing support and QbD-driven process development.

Evonic® has established a 2 L process for production of a nutritionally relevant amino acid in E. coli. This process was successfully adapted to the smaller working volume of a DASbox® Mini Bioreactor System with close monitoring of all relevant process parameters and comprehensive evaluation of data to prove reliable and reproducible results.

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High cell-density fermentation

Compared to cell culture applications, fermentation processes require much higher kLa values for proper mass transfer. Especially in high cell-density fermentations, there is much heat generated by the microbial growth which has to be efficiently dissipated. High microbial densities place increased demands on the fermentation equipment, especially regarding mixing and cooling. This is a special challenge, particularly in single-use fermentation .
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Download application note

Scale-up

In microbial production of food additives, successful scale-up to production volume is key for a competitive business. Suitable parameters and setpoints need to be identified and critical engineering parameters to be considered. These include vessel and impeller geometry, mass transfer rate, power numbers (Np) and impeller power consumption per volume (P/V). Simulation of computer fluid dynamics (CFD) can help predicting fluid flow conditions in the different scales .

Further downloads

Genetic Engineering & Biotechnology News: Tackling the Challenge of Scalability

Fermentation Systems for Bioprocess Scale-up from Small to Pilot/Production

Optimization of Computer Fluid Dynamics Modeling

Scale-up of bioprocess cultures from bench scale to pilot or production scale requires identifying key engineering characteristics to produce predictable and proportional product yields at each scale.

Cell Culture Scale-Up in Stirred-Tank Single-Use Bioreactors

Bioprocess development usually is carried out in systems with small working volumes.

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