Reducingthe total nutrients(nitrogen supplements
andYNB)from10.53to5.26or2.63g/ldidnotchange
ethanol production signi®cantly (P>0.05). However,
furtherreductionofnutrientsto1.05or0.53g/lreduced
the rateofethanol productionconsiderably
P0:01.
Ethanolproductionandyieldobtainedduring optimizationofnitrogensupplementationduringfermentation