Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.
2004
Volume 7
Issue 2
Topic:
Biotechnology
ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
Rymowicz W. , Lenart D. 2004. ENHANCED PRODUCTION OF OXALIC ACID IN ASPERGILLUS NIGER BY THE ADDITION OF METHANOL, EJPAU 7(2), #03.
Available Online: http://www.ejpau.media.pl/volume7/issue2/biotechnology/abs-03.html

ENHANCED PRODUCTION OF OXALIC ACID IN ASPERGILLUS NIGER BY THE ADDITION OF METHANOL

Waldemar Rymowicz, Dorota Lenart

 

ABSTRACT



The stimulating effects of methanol on the growth and production of oxalic acid from post-refining fatty acids (by-product of plant oil production containing free fatty acids) by a mutant of Aspergillus niger were investigated in submerged fermentation experiments. Both the final concentration and the yield of the product were highest when 1.5 % (w/v) methanol was added at the time of inoculation culture. With a medium containing of 50 g/l fatty acids, production reached a maximum of 75 g/l oxalic acid with yield on fatty acids consumed up to 1.57 g/g after 7 d. The concentration of oxalic acid and the product yield was 1.4 and 1.34 times higher, respectively, than the control (without methanol).

Key words: Aspergillus niger; biosynthesis; fatty acids; methanol; oxalic acid..