Energy-driven biorefineries can be designed considering biotechnological and thermochemical conversion pathways. Nevertheless, energy and environmental comparisons are necessary to establish the best way to upgrade lignocellulosic biomass and set the requirements of these processes in different scenarios. This paper aims to evaluate experimentally a biorefinery producing energy vectors using coffee-cut stems (CCS) as feedstock. The obtained yields were the basis for energy and environmental analysis, in two different biorefinery scenarios: (i) production of bioethanol and biogas and (ii) production of syngas and electricity. The energy results indicated that the overall energy efficiency calculated in the first scenario was only 9.15%. Meanwhile, the second biorefinery configuration based on thermochemical routes presented an energy efficiency value of 70.89%. This difference was attributed to the higher consumption of utilities in the biorefinery based on biotechnological routes. The environmental results showed that the impact category of climate change for the first biorefinery (i.e., 0.0193 kg CO₂ eq./MJ) had a lower value than that of the second process (i.e., 0.2377 kg CO₂ eq./MJ). Thus, the biorefinery based on the biotechnological route presented a better environmental performance. Additionally, the results for both biorefineries allowed concluding that the inclusion of by-products and co-products in the calculation of the environmental analysis can dramatically affect the results.

可以考虑生物技术和热化学转化途径来设计能源驱动的生物精炼厂。但是，必须进行能源和环境比较，以建立升级木质纤维素生物质的最佳方法，并在不同情况下设定这些过程的要求。本文旨在通过实验评估一家以咖啡切碎的茎（CCS）为原料生产能量载体的生物精炼厂。在两种不同的生物精炼方案中，获得的产量是能源和环境分析的基础：（i）生产生物乙醇和沼气，以及（ii）生产合成气和电力。能源结果表明，在第一种情况下计算出的总体能源效率仅为9.15％。与此同时，基于热化学路线的第二个生物精炼厂配置的能效值为70.89％。这种差异归因于基于生物技术路线的生物精炼厂中公用事业的较高消耗。环境结果表明，第一个生物精炼厂的气候变化影响类别（即0.0193 kg CO₂ eq./MJ）的值低于第二个过程的值（即0.2377 kg CO ₂ eq./MJ）。因此，基于生物技术路线的生物精炼厂具有更好的环境性能。另外，两个生物精炼厂的结果都可以得出结论，在环境分析的计算中包括副产物和副产物会极大地影响结果。