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首页> 外文会议>Second International Conference on Sustainable Agriculture for Food, Energy and Industry Vol.2 >Comparative Efficiency of Aspergillus terreus and Zymomonas mobilis in Fermenting Sugar Beet Pulp
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Comparative Efficiency of Aspergillus terreus and Zymomonas mobilis in Fermenting Sugar Beet Pulp

机译：曲霉曲霉和运动发酵单胞菌发酵甜菜浆的比较效率

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The efficiency of Aspergillus terreus and Zymomonas mobilis in fermenting sugar beet pulp as monocultures or mixed culture was compared by measuring the changes in pH, biomass, sucrose, reducing sugars and ethanol. For mixed culture or coculture studies Z. mobilis was inoculated into a 24h culture of A. terreus in 100 ml beet pulp (100b fresh weight/1). The maximum biomass was attained at 64 h of fermentation in A.terreus monoculture, while the biomass of Z.mobilis biomass in monoculture was maximum at 40 h. The biomass of both organisms decreased in co-culture. Sucrose utilization was maximum in the first 8 h of growth in Z.mobilis in monoculture. In A. terreus fermentation sucrose utilization was gradual and the rate of sucrose utilization was maximum between 24 and 32 h of fermentation. In co culture fermentation maximum sucrose utilization was observed 8 h after the introduction of Z.mobilis. Z.mobilis produced maximum ethanol 16 hours earlier than A.terreus. The highest ethanol yield in co-culture was attained at 32 h and it was more efficient than the monoculture experiments producing 4.8g/l ethanol from 100g fresh weight/1 beet pulp with 10.2 % sucrose (96.8% theoretical yield).
机译：通过测量pH，生物量，蔗糖，还原糖和乙醇的变化，比较了曲霉菌和运动发酵单胞菌在甜菜果肉单培养或混合培养中的效率。为了进行混合培养或共培养研究，将运动发酵单胞菌接种在100ml甜菜浆（100b新鲜重量/ 1）中的曲霉24小时培养物中。曲霉单培养发酵64 h达到最大生物量，单培养发酵单胞菌生物量在40 h达到最大。在共培养中，两种生物的生物量均下降。在单培养中运动发酵单胞菌生长的前8小时，蔗糖利用率最高。在土壤曲霉发酵中，蔗糖利用是逐渐的，并且在发酵的24至32小时之间蔗糖利用的速率最大。在共培养发酵中，引入运动发酵单胞菌8小时后观察到最大的蔗糖利用率。运动发酵单胞菌比土曲霉提前16小时产生最大乙醇。共培养的最高乙醇产量在32 h达到，并且比单培养实验更有效，后者是从100 g鲜重/ 1甜菜浆中以10.2％蔗糖生产4.8g / l乙醇（理论产率为96.8％）。

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