Biofloc technology (BFT) has been called an environmentally friendly aquaculture approach. The sustainable characteristics of biofloc-based culture are usually linked to the efficient use of water and nutrients and the minimal discard of effluent to the environment. Given the scarcity of sustainability assessment of biofloc-based systems, it is still unclear whether the positive characteristics of BFT make it a real sustainable approach for aquaculture. This study aimed to investigate and apply the emergy synthesis to assess the sustainability of commercial Nile tilapia fingerlings production in a biofloc-based system. The tilapia fingerlings produced on the BFT farm showed a UEV of 2.04E + 03 sej/J, renewability of 32.73%, EYR of 1.00, EIR, and ELR of 2.05, and ESI of 0.49. Compared to other aquaculture systems, the evaluated BFT farm presented emergy indicators with values characteristic of potentially sustainable production. Electricity has the highest representativeness in the emergy input, making the system dependent on resources from the larger economy. The low UEV indicates that the BFT farm is efficient in terms of converting the invested emergy into the system’s output (tilapia fingerlings). A sensitivity analysis shows that replacing the hydroelectric source of electricity with photovoltaic will not improve the emergy performance of the evaluated BFT farm.

生物絮团技术 (BFT) 被称为一种环境友好的水产养殖方法。基于生物絮团的养殖的可持续特征通常与水和养分的有效利用以及排放到环境中的废水最少有关。鉴于基于生物絮团的系统的可持续性评估的稀缺性，目前尚不清楚 BFT 的积极特征是否使其成为水产养殖的真正可持续方法。本研究旨在调查和应用能值合成，以评估基于生物絮团的系统中商业尼罗罗非鱼鱼种生产的可持续性。BFT 养殖场生产的罗非鱼鱼种的 UEV 为 2.04E + 03 sej/J，可再生性为 32.73%，EYR 为 1.00，EIR 和 ELR 为 2.05，ESI 为 0.49。与其他水产养殖系统相比，被评估的 BFT 农场提供了具有潜在可持续生产特征值的能值指标。电力在能值输入中具有最高的代表性，使得系统依赖于更大经济体的资源。低 UEV 表明 BFT 养殖场在将投入的能值转化为系统产出（罗非鱼鱼种）方面是有效的。敏感性分析表明，用光伏代替水力发电不会提高被评估 BFT 农场的能值性能。低 UEV 表明 BFT 养殖场在将投入的能值转化为系统产出（罗非鱼鱼种）方面是有效的。敏感性分析表明，用光伏代替水力发电不会提高被评估 BFT 农场的能值性能。低 UEV 表明 BFT 养殖场在将投入的能值转化为系统产出（罗非鱼鱼种）方面是有效的。敏感性分析表明，用光伏代替水力发电不会提高被评估 BFT 农场的能值性能。