Research Journal of Microbiology1816-4935xxxx-xxxxScience International10.3923/jm.2006.70.75ZhuShengdong WuYuanxin YuZiniu TongHaibao ChengDachang XieDecheng 1200611Xanthan fermentation processes were investigated in a 5 L Mechanically Stirred Aerated Fermenter (MSAF) with and without external loop. Experimental data showed that the process with external loop had higher final xanthan gum concentration, shorter fermentation time and lower energy consumption.]]>Cacik, F., R.G. Dondo and D. Marques,200125409418Garcia-Ochoa, F., V.E. Santos, J.A. Gasas and E. Goemz,200018549579Lo, Y.M., C.H. Hsu, S.T. Yang and D.B. Min,200124187193Miller, G.L.,195931426428Zhao, X.M., Z.D. Hu, A.W. Nienow, C.A. Kent and S. Chatwin,19942198209Zhu, S.,19921992