两种发酵工艺对黄原胶发酵的影响

Effect of two fermentation processes on xanthan gum

对添加表面活性剂TritonX - 10 0与补水两种不同工艺条件对黄原胶发酵的影响进行了研究。结果表明 :( 1)产胶初期添加 40× 10 -6TritonX - 10 0的试验组对黄原胶产胶率的促进作用最为明显 ,其产胶率可达3.95 1g/10 0mL ,较对照组提高约 11% ,碳源转化率为 71.836 %。 ( 2 )保持碳源含量 6 .5 % ,当发酵进行至 36h时补加 2 0 %的水分 ,黄原胶的产胶率可达 4.96 2g/10 0mL ,较对照组提高约 15 % ,碳源转化率为 76 .338%。

Effect of Triton X 100 or water added on xanthan gum fermentation was with Xanthomonas campestris HL 9901 studied. It showed that: (1) 40ppm Triton X 100 added at the beginning of gum producing to the fermentation media had significant effect on the productivity, and its gum productivity reached 3.951g/100mL, exceeded the control by 11%. The carbon transformation ratio was 71.836%. However, it improved the viscosity of colloid by the addition of Triton X 100 at the initiate of fermentation is superior to the control. (2) If the carbon concentration was kept at 6.5%, the gum productivity reached 4.962g/100mL, increased by 15% when 20% water added after 36h fermentation, and the carbon transformation ratio was 76.338%.