A new process for the continuous production of succinic acid from glucose at high yield, titer, and productivity

Biotechnology and Bioengineering - Tập 99 Số 1 - Trang 129-135 - 2008
Isabelle Meynial‐Salles1, Sophie Dorotyn, Philippe Soucaille
1Laboratoire d'Ingénierie des Systèmes Biologiques et des Procédés, UMR-INSA/CNRS 5504, UMR INSA/INRA 792, INSA, 135 avenue de Rangueil, 31077 Toulouse cedex 4, France.

Tóm tắt

AbstractA novel three stages continuous fermentation process for the bioproduction of succinic acid at high concentration, productivity and yield using A. succiniciproducens was developed. This process combined an integrated membrane‐bioreactor‐electrodialysis system. An energetic characterization of A. succiniciproducens during anaerobic cultured in a cell recycle bioreactor was done first. The very low value of YATP obtained suggests that an ATP dependent mechanism of succinate export is present in A. succiniciproducens. Under the best culture conditions, biomass concentration and succinate volumetric productivity reach values of 42 g/L and 14.8 g/L·h. These values are respectively 28 and 20 times higher compared to batch cultures done in our laboratory. To limit end‐products inhibition on growth, a mono‐polar electrodialysis pilot was secondly coupled to the cell recycle bioreactor. This system allowed to continuously remove succinate and acetate from the permeate and recycle an organic acids depleted solution in the reactor. The integrated membrane‐bioreactor‐electrodialysis process produced a five times concentrated succinate solution (83 g/L) compared to the cell recycle reactor system, at a high average succinate yield of 1.35 mol/mol and a slightly lower volumetric productivity of 10.4 g/L·h. The process combined maximal production yield to high productivity and titer and could be economically viable for the development of a biological route for succinic acid production. Biotechnol. Bioeng. 2008;99: 129–135. © 2007 Wiley Periodicals, Inc.

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Thông tin xuất bản

Biotechnology and Bioengineering

Tập 99 Số 1

129-135

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