Microalgae are source of third generation biofuel having the key advantage of high lipid productivity. In recent times, biorefinery is seen as promising option to further reduce the production cost of microalgae biofuel. However, exact energy balance analysis has not been performed on important biorefinery routes. In this aspect, three biorefinery routes, all based on lipid based biorefinery route are evaluated for economical production of microalgal biofuel and valorised products. Biorefinery route 1 involves production of biodiesel, pigments, and animal feed. Biorefinery route 2 involves biogas and pigments production and two stage fermentation, and third biorefinery route involves bio-hydrogen and pigments production. Finally, the technoeconomic assessment of three biorefinery routes were reviewed, net energy savings, and life-cycle costing approaches to economize microalgal biorefinery are suggested.

中文翻译：

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基于微藻的生物精炼厂促进循环生物经济技术经济和生命周期分析。

微藻是具有高脂质生产率的关键优势的第三代生物燃料的来源。近年来，生物精炼被认为是进一步降低微藻生物燃料生产成本的有前途的选择。但是，尚未对重要的生物精炼路线进行精确的能量平衡分析。在这方面，对全部基于脂类生物精炼路线的三种生物精炼路线进行了评估，以经济地生产微藻生物燃料和增值产品。生物精炼路线1涉及生物柴油，颜料和动物饲料的生产。生物炼制路线2涉及沼气和色素生产以及两阶段发酵，第三生物炼制路线涉及生物氢和色素生产。最后，审查了三种生物精炼路线的技术经济评估，净节能量，