An economical biorefinery process for propionic acid production from glycerol and potato juice using high cell density fermentation.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

An economically sustainable process was developed for propionic acid production by fermentation of glycerol using Propionibacterium acidipropionici and potato juice, a by-product of starch processing, as a nitrogen/vitamin source. The fermentation was done as high-cell-density sequential batches with cell recycle. Propionic acid production and glycerol consumption rates were dependent on initial biomass concentration, and reached a maximum of 1.42 and 2.30gL(-1)h(-1), respectively, from 50gL(-1) glycerol at initial cell density of 23.7g(CDW)L(-1). Halving the concentration of nitrogen/vitamin source resulted in reduction of acetic and succinic acids yields by ∼39% each. At glycerol concentrations of 85 and 120gL(-1), respectively, 43.8 and 50.8gL(-1) propionic acid were obtained at a rate of 0.88 and 0.29gL(-1)h(-1) and yield of 84 and 78mol%. Succinic acid was 13g% of propionic acid and could represent a potential co-product covering the cost of nitrogen/vitamin source.

Detaljer

Författare
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Industriell bioteknik
  • Kemi
Originalspråkengelska
Sidor (från-till)504-512
TidskriftBioresource Technology
Volym135
StatusPublished - 2013
PublikationskategoriForskning
Peer review utfördJa

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Relaterad forskningsoutput

Dishisha, T., 2013, 154 s.

Forskningsoutput: AvhandlingDoktorsavhandling (sammanläggning)

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