The new microalgae-to-biofuels chains for producing diesel and ethanol simultaneously are presented. The techno-economic analysis shows that the break-even prices of diesel and ethanol are estimated about US$0.49/kg and US$2.61/kg, respectively, the internal rate of return (IRR) is close to 29.21%, and the commercial prices and yield of products dominate the profitability of this project. According to life cycle analysis (LCA) standards, the life-cycle greenhouse gas (GHG) emissions for producing diesel and ethanol are 0.039 kg CO₂-eq/MJ FAME and 0.112 kg CO₂-eq/MJ EtOH, respectively. It is verified that the process integration of the heat recovery scheme, the entrainer recovery tower, and CO₂ recycling can effectively reduce life-cycle GHG emissions of this design. Through a specific optimization algorithm under different lipid contents and 180 scenario combinations for the cultivation and pretreatment processes, the compromise solutions between the maximum total revenue and the minimum environmental impact can be found.

介绍了用于同时生产柴油和乙醇的新型微藻类到生物燃料的链。技术经济分析显示，柴油和乙醇的收支平衡价格分别约为0.49美元/千克和2.61美元/千克，内部收益率（IRR）接近29.21％，商业价格和产品的产量主导了该项目的盈利能力。根据生命周期分析（LCA）标准，生产柴油和乙醇的生命周期温室气体（GHG）排放分别为0.039 kg CO ₂当量/ MJ FAME和0.112 kg CO ₂当量/ MJ EtOH。验证了热量回收方案，夹带剂回收塔和CO ₂的过程集成回收利用可以有效减少该设计的生命周期温室气体排放。通过在不同脂质含量和180种方案组合下针对种植和预处理过程的特定优化算法，可以找到最大总收益与最小环境影响之间的折衷解决方案。