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Applied Biochemistry and Biotechnology

, Volume 78, Issue 1–3, pp 485–499 | Cite as

Electrodialysis of acetate fermentation broths

  • U. N. Chukwu
  • M. CheryanEmail author
Article

Abstract

Electrodialysis (ED) shows good potential for downstream processing of acetate fermentation broths, to separate acetic acid while unreacted glucose and other nutrients are partially recycled back to the fermenter. With conventional anion- and cation-exchange membranes, higher current increased acetate flux, water flux, and energy consumption. Multiple ED stacks connected in series with unequal initial volumes for a batch process maximized acetate concentration in the concentrating stream to 134g/L calcium-magnesium acetate (CMA) in the fermentation broth at pH 6.8. Back-transport of acetate from the product into the feed stream and water transport limit the maximum concentration possible. Cost of ED is about $295/ton acetate for the CMA broth.

Index Entries

Acetate electrodialysis membranes separation 

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Copyright information

© Humana Press Inc. 1999

Authors and Affiliations

  1. 1.Agricultural Bioprocess LaboratoryUniversity of IllinoisUrbana

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