Department of Environmental Science and Engineering, College of Resource and Environment, Sichuan Agricultural University-Chengdu Campus, Chengdu, Sichuan 611130, PR China.
Bioresour Technol. 2013 Feb;130:248-55. doi: 10.1016/j.biortech.2012.12.025. Epub 2012 Dec 14.
In order to recycle the cotton-based waste textiles, a novel process was designed for pretreating waste textiles with phosphoric acid to recover polyester and fermentable sugar. The effects of pretreatment conditions including, phosphoric acid concentration, pretreatment temperature, time, and ratio of textiles and phosphoric acid were thoroughly investigated. Results indicated the mentioned four factors had significant influences on sugar and polyester recovery. Almost complete polyester recovery was achieved by enhancing phosphoric acid concentration, temperature and pretreatment time or reducing the ratio of textiles and phosphoric acid. However, these behaviors decreased the sugar recovery seriously. 100% polyester recovery with a maximum sugar recovery of 79.2% was achieved at the optimized conditions (85% phosphoric acid, 50°C, 7h, and the ratio of 1:15). According to the technical and cost-benefit analysis, it was technically feasible and potentially profitable to recover polyester and sugar from waste textiles by phosphoric acid pretreatment.
为了回收棉基废弃纺织品，设计了一种用磷酸预处理废弃纺织品以回收聚酯和可发酵糖的新工艺。详细考察了预处理条件，包括磷酸浓度、预处理温度、时间和纺织品与磷酸的比例，对糖和聚酯回收的影响。结果表明，这四个因素对聚酯和糖的回收有显著影响。通过提高磷酸浓度、温度和预处理时间或降低纺织品与磷酸的比例，可以实现几乎完全的聚酯回收，但严重降低了糖的回收。在优化条件（85%磷酸、50°C、7h 和 1:15 的比例）下，可实现 100%的聚酯回收和 79.2%的最大糖回收。根据技术和成本效益分析，用磷酸预处理从废纺织品中回收聚酯和糖在技术上是可行的，并且具有潜在的盈利性。
