Optimization of citric acid production using a mutant strain of Aspergillus niger on cassava peel substrate

This study established the usefulness of UV-mutation and medium optimization in improving the yield of citric acid. This study highlights the practicability of enhancing citric acid yield using mutant strains of A. niger on agro waste such as cassava peels, coupled with a suitable combination of optimal operational parameters. To the best of our knowledge, this work represents the first reference to the utilization of cassava peel-malted sorghum blend in submerged condition for the production of citric acid by A. niger.