Sweet sorghum represents a readily available renewable carbohydrate feedstock for biofuel production. Generally, the sweet sorghum growing season and window for processing is short and it is often desirable to store a sugar-rich material for future processing. Therefore, we investigated the possibility of storing three different sweet sorghum sugar syrups under a layer of soybean oil; then we investigated subsequent yeast bioethanol fermentation.

A layer of oil on the surface of the syrup reduced sugar loss in 30 and 40°Bx syrups, but the loss was still 21–36 %. Storage of 50°Bx syrup resulted in an 11–18 % loss of sugars with or without a surface layer of oil. Elevated levels of lactic and acetic acids, caused by bacterial contamination, almost completely inhibited yeast fermentation; however, when ethanol-producing microorganisms were part of the contamination, stored syrups produced a bioethanol at a yield of 83–91 %, compared to theoretical.

甜高粱代表了一种易于获得的可再生碳水化合物原料，可用于生产生物燃料。通常，甜高粱的生长季节和加工时间很短，通常需要储存富含糖的材料以备将来加工。因此，我们研究了在豆油层下储存三种不同的甜高粱糖浆的可能性。然后我们调查了随后的酵母生物乙醇发酵。

糖浆表面的油层减少了30和40°Bx糖浆中的糖损失，但损失仍为21–36％。储存50°Bx糖浆会导致含糖或不含油的表层糖损失11-18％。由细菌污染引起的乳酸和乙酸水平升高，几乎完全抑制了酵母发酵；但是，当产生乙醇的微生物是污染的一部分时，与理论值相比，储存的糖浆产生的生物乙醇产率为83-91％。