Abstract
Acetate can be separated from fermentation broths and partially purified by nanofiltration (NF). Membrane performance was a function of pressure, pH, concentration of acetate, temperature, and the presence of other media components. With Nitto-Denko’s NTR729 membrane, average acetate rejection was 60%, glucose rejection was 99%, and flux was 15 L/m2/h at 200 psig, 30°C, pH 5.6, and 20 g/L acetic acid. The best downstream strategy is to clarify the fermentation broth by microfiltration (MF), recycle the cells for improving fermenter productivity, nanofilter the cell-free broth, and then evaporate the permeate. The cost of ceramic MF and NF purification is about $66/t acetate, compared to the cost of potassium acetate ($950/t) or calcium-magnesium acetate ($700/t).
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© 1996 Springer Science+Business Media New York
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Han, I.S., Cheryan, M. (1996). Downstream Processing of Acetate Fermentation Broths by Nanofiltration. In: Wyman, C.E., Davison, B.H. (eds) Seventeenth Symposium on Biotechnology for Fuels and Chemicals. ABAB Symposium, vol 57/58. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-4612-0223-3_2
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DOI: https://doi.org/10.1007/978-1-4612-0223-3_2
Publisher Name: Humana Press, Totowa, NJ
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