Journal
RESOURCES CONSERVATION AND RECYCLING
Volume 129, Issue -, Pages 27-35Publisher
ELSEVIER
DOI: 10.1016/j.resconrec.2017.09.024
Keywords
Aspergillus niger; Cellulose hydrolysis; Circular textile; Fungal cellulase; Solid state fermentation; Textile waste recycling
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Funding
- Hong Kong Innovation and Technology Commission for the Innovation and Technology Fund [ITP/109/15TP]
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This study investigated the feasibility of using textile waste as feedstock for cellulase production through solid state fermentation. Aspergillus niger CKB was selected with the highest cellulase activity (0.43 +/- 0.01 FPU g(-1)) after 7 days of cultivation on pure cotton. Material modification techniques including autoclaving, alkali pretreatment and milling were applied on six types of textiles with various cotton/polyester blending ratios. The results indicated that using autoclaved textile blending cotton/polyester of 80/20 led to the highest cellulase activity (1.18 +/- 0.05 FPU g(-1)) with CMCase, beta-glucosidase and avicelase activities of 12.19 +/- 0.56 U g(-1), 1731 +/- 4.98 U g(-1) and 2.58 +/- 0.07 U g(-1), respectively. The fungal cellulase was then extracted and applied to textile waste hydrolysis, in which a sugar recovery yield of 70.2% was obtained. The present study demonstrates a novel circular textile waste-based biorefinery strategy with recovery of glucose and polyester as value-added products.
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