首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Ethanol production from sulphuric acid wood hydrolysate ofPinus radiata using free and immobilized cells ofPichia stipitis
Authors:N Qureshi  G J Manderson
Institution:(1) Biotechnology Department, Massey University, Palmerston North, New Zealand
Abstract:Summary Ethanol was produced by a strain ofPichia stipitis adapted to an inhibitory acid wood hydrolysate ofPinus radiata. The best ethanol productivity for batch cultures was 0.21 g/l h at 0.7% ethanol. Varying culture conditions increased ethanol concentration to 0.76%, however the productivity decreased to 0.18 g/l h. A decrease in ethanol concentration in the culture fluid was noted late in the batch which suggested ethanol catabolism. Values of kinetic parameters (K m,K s,mgr max, andV max) were evaluated for this system. The use of calcium alginate immobilized cells in a continuous-flow stirred tank reactor lead to enhanced fermentative performance, namely a maximum productivity of 0.27 g/l h and 1.13% ethanol yield. The immobilized cells in continuous flow reactors represent an attractive option for fermenting sugars released by sulphuric acid hydrolysis ofP. radiata wood.
Keywords:Pichia stipitis  Acid hydrolysate  Pinus radiata  Ethanol
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号