Effect of nitrogen sources on microbial production of xylitol.

Experimental investigation on batch fermentation of xylose to xylitol using Candida parapsilosis NCIM-3323 has been carried out and the effect of different nitrogen sources on xylitol production has been investigated. It is noticed that Ammonium sulfate is best suitable compared to other sources used. The present work utilized five nitrogen sources namely Potassium Nitrate, Ammonium Chloride, Ammonium Sulfate, Ammonium Nitrate and Urea in the experiments for a fermentation period of 144 h at 30 0C at pH of 3.5 with initial xylose concentration of 60 g/l. The work was also carried out varying concentration of Ammonium sulfate, wherein it was found that 4 g/l of ammonium sulfate gives highest yield.