Abstract
Itaconic acid production by Aspergillus terreus (A. terreus) was investigated using the undetoxified enzymatic hydrolysate of steam-exploded corn stover as the sole carbon source. The fermentation conditions for A. terreus were optimized based on glucose as the carbon source. Unfortunately, wild-type A. terreus did not grow in the undetoxified enzymatic hydrolysate. Therefore, atmospheric and room temperature plasma (ARTP) mutagenesis was applied to obtain A. terreus mutant AT-90. A. terreus mutant AT-90 grew and secreted itaconic acid in the undetoxified enzymatic hydrolysate. The highest itaconic acid concentration (19.30 g/L) with a yield of 36.01% was obtained from the undetoxified enzymatic hydrolysate of 10% (w/v) steam-exploded corn stover. This work demonstrated that the A. terreus mutant generated by ARTP efficiently improved itaconic acid production from lignocellulose-based carbon source.
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