The primary practices for waste textile management are landfill and incineration, generating serious environmental problems while they have a high potential for sustainable production of different green products. This study dealt with the economic analysis of bioethanol production and polyester recovery from waste textile through different scenarios. The pretreatment plays a key role in the biofuel production from waste textile and the most promising methods are pretreatment with NaOH, NaOH/urea, NaOH/thiourea, NaOH/urea/thiourea, and N-Methylmorpholine N-oxide, evaluated through scenarios 1 to 5, respectively. After pretreatment, the cotton part is enzymatically hydrolyzed and fermented through simultaneous saccharification and fermentation. Detailed simulations of the processes were carried out by Aspen Plus, and economic studies were conducted by Aspen Process Economic Analyzer for each scenario. The bioethanol production price were 0.447, 0.524, 0.624, 0.618, and 1.244 $/L for scenarios 1 to 5. The total capital investments required for scenarios 1 to 5 were 38.54, 38.60, 38.42, 38.57, and 39.35 M$, respectively. The profitability index for scenarios 1 to 5 were 2.17, 1.92, 1.61, 1.34, and 1.51. Therefore, the biorefinery based on producing bioethanol from waste textile is economically feasible. Moreover, In scenario 1, the payout period was the minimum time of 3.56 year, and the net return rate was 117.16. Sensitivity analysis also reveals that the price of waste textile has a significant impact on the profitability of the designed biorefinery. Scenario 5 is the most sensitive to variations in waste textile price; a 100% increase in the cost of waste textile increases the cost of producing bioethanol to more than 1.45 $/L, respectively.

废纺织品管理的主要做法是填埋和焚烧，虽然它们具有可持续生产不同绿色产品的巨大潜力，但会产生严重的环境问题。本研究涉及不同情景下生物乙醇生产和从废旧纺织品中回收聚酯的经济分析。预处理在废旧纺织品的生物燃料生产中起着关键作用，最有前途的方法是用 NaOH、NaOH/尿素、NaOH/硫脲、NaOH/尿素/硫脲和 N-甲基吗啉 N-氧化物进行预处理，通过情景 1 到5、分别。预处理后的棉花部分通过同步糖化发酵进行酶解发酵. Aspen Plus 对流程进行了详细模拟，Aspen Process Economic Analyzer 针对每种情况进行了经济研究。情景 1 至 5 的生物乙醇生产价格分别为 0.447、0.524、0.624、0.618 和 1.244 美元/升。情景 1 至 5 所需的总资本投资分别为 38.54、38.60、38.42、38.57 和 39.35 M$。盈利能力情景 1 至 5 的指数分别为 2.17、1.92、1.61、1.34 和 1.51。因此，以废旧纺织品生产生物乙醇为基础的生物精炼在经济上是可行的。此外，情景一中，派息期最短为3.56年，净收益率为117.16。敏感性分析还表明，废纺织品的价格对设计的生物精炼厂的盈利能力有重大影响。情景 5 对废旧纺织品价格的变化最为敏感；废纺织品成本增加 100% 会使生产生物乙醇的成本分别增加到 1.45 美元/升以上。