Effect of sucrose concentration on oxalic acid biosynthesis by Aspergillus niger

Ewa Walaszczyk , Elżbieta Gąsiorek , Waldemar Podgórski


The aim of the work was to determine the influence of initial sucrose concentration in fermentation medium on oxalic acid synthesis by Aspergillus niger W78C in submerged batch culture. Cultivations were conducted in synthetic medium containing sucrose in the concentration of 100, 125, 150, 175 or 200 g·dm–3. As the result of the present investigation, the optimal sucrose concentration was found at the level of 125 g·dm–3. In medium containing this amount of carbon source, 70.2 g·dm–3 of oxalic acid was obtained. When substrate concentration was the highest, 200 g dm–3, the amount of product was only 5.2 g·dm–3 higher than in medium with 125 g·dm–3 of sucrose. Moreover, an increase of the initial sucrose concentration resulted in process time extension, an increase of citric and gluconic acids concentration and a decrease of productivity and oxalic acid yield.
Author Ewa Walaszczyk (EaE / IChaFT / DBaFA)
Ewa Walaszczyk,,
- Department of Biotechnology and Food Analysis
, Elżbieta Gąsiorek (EaE / IChaFT / DBaFA)
Elżbieta Gąsiorek,,
- Department of Biotechnology and Food Analysis
, Waldemar Podgórski (EaE / IChaFT / DBaFA)
Waldemar Podgórski,,
- Department of Biotechnology and Food Analysis
Journal seriesZeszyty Problemowe Postępów Nauk Rolniczych, ISSN 0084-5477, (B 13 pkt)
Issue year2017
Publication size in sheets0.5
Keywords in Englishoxalic acid, Aspergillus niger, biosynthesis, sucrose, carbon source
Languageen angielski
Effect_of_sucrose_concentration_on_oxalic_acid.pdf 354,2 KB
Score (nominal)13
Score sourcejournalList
Citation count*2 (2020-09-20)
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