Effect of sucrose concentration on oxalic acid biosynthesis by Aspergillus niger
Ewa Walaszczyk , Elżbieta Gąsiorek , Waldemar Podgórski
AbstractThe 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.
|Journal series||Zeszyty Problemowe Postępów Nauk Rolniczych, ISSN 0084-5477, (B 13 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||oxalic acid, Aspergillus niger, biosynthesis, sucrose, carbon source|
|Citation count*||2 (2020-09-20)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.