【摘要】 本文是PVA固定化细胞在35升X2串联柱式生物反应器中进行糖蜜发酵生产乙醇的工业小试报告。工业小试表明:PVA载体填充量与固定化细胞生产乙醇能力不呈正比关系,而通氧则是保证固定化细胞正常发酵的必要条件。在连续发酵中,PVA固定化细胞乙醇生产能力可达到16.7克/升胶·小时和2.2克/升罐·小时,分别是传统发酵乙醇生产能力的8.4倍和1.6倍。发酵周期分别缩短为24小时(以生物反应器有效容积计算)和3.2小时(以PVA载体有效容积计算),约是传统发酵方法的1/2和1/14。采用PVA固定化细胞发酵新工艺可增加乙醇产量80％,生产成本亦可明显降低。更多还原

【Abstract】 This paper deals with the small industrial scale experiment on alcoholic production of molasses by PVA immobilized cell system. A double-column bioreactor system with a capacity of 35 liters was used. The experimental results showed that in the batch fermentation, the alcohol productivity did not positively correlated with the packing of PVA gel , but oxygenation is the necessary condition for the normal fermentation by growing immobilized yeast. In the continuous fermentation process,the alcohol productivity was at the level of 16- 7 g/1 gel, hr and 2. 2g/l jar. hr, which is 8-4times and 1.6 times as high as that in traditional fermentation process respectively. The fermentation cycle was shortened to 24 hours and 3. 2 hours (retained time) respectively, which is 1/2 and 1/14 as long as that in traditional fermentation process. It was estimated that the use of the new technique of immobilized cell can raise production efficiency by 80%.更多还原