Microalgae biomass is considered by many as a most promising renewable source for future generation feedstock for simultaneous production of biodiesel and bioethanol due to the accumulation of considerable amounts of lipids and carbohydrates, respectively. In this work, defatted green microalga, Chlorella sorokiniana NITTS3 biomass was ultrasonic pretreated and effectively used as a culture medium for ethanol production through fermentation using Saccharomyces cerevisiae NITTS1. The ultrasonic pretreatment improved ethanol yield by 25.83 g/L than untreated defatted microalgal biomass. Carbohydrate content of hydrolysate of defatted microalgal biomass after ultrasonic pretreatment was analyzed and found that hydrolysate primarily possessed simple sugars, namely glucose and xylose. Maximally 52.10 ± 0.12 g/L (86.70 ± 0.52 mg bioethanol/g DMB) of ethanol was produced at optimum fermentation conditions of 30 ℃, pH 4 and 200 rpm. This study results show that pretreated microalgal biomass could be used as a cheap, sustainable feedstock for enhanced ethanol production.

许多人认为微藻生物质是用于同时生产生物柴油和生物乙醇的下一代原料的最有前途的可再生资源，因为它们分别积累了大量的脂质和碳水化合物。在这项工作中，对脱脂的绿色微藻Sorokiniana小球藻NITTS3生物质进行了超声波预处理，并有效地用作了通过酿酒酵母发酵生产乙醇的培养基。NITTS 1。超声预处理与未处理的脱脂微藻生物质相比，乙醇产量提高了25.83 g / L。分析了超声波预处理后的脱脂微藻生物质水解产物的碳水化合物含量，发现该水解产物主要具有单糖，即葡萄糖和木糖。在30℃，pH 4和200 rpm的最佳发酵条件下，乙醇的最大产量为52.10±0.12 g / L（86.70±0.52 mg生物乙醇/ g DMB）。这项研究结果表明，预处理的微藻生物质可以用作廉价，可持续的原料，以提高乙醇产量。