Degumming of ramie fiber and the production of reducing sugars from waste peels using nanoparticle supplemented pectate lyase

• NP-PL degummed ramie fiber better than PL at 24 and 48 h treatment.
• NP-PL enhanced RS production from fruit and vegetables peels at 50 and 90 °C.
• NP-PL enhanced the weight loss of peels as well as ramie fibers.
• NP-PL enhanced the fiber tenacity and fineness.
• Compared to PL NP-PL was potentially more effective for industrial applications.

Banana, citrus and potato peels were subjected to treatment with hydroxyapatite nanoparticle (NP) supplemented purified pectate lyase (NP-PL), isolated from Bacillus megaterium AK2 to produce reducing sugar (RS). At both 50 and 90 °C production of RS by NP-PL was almost twofold greater than that by untreated pectate lyase (PL) from each of the three peels. The optimal production of RS from banana and citrus peels were after 24 and 6 h of incubation while it was 24 and 4 h for potato peels at 50 and 90 °C, respectively, on NP-PL treatment. NP-PL could degum raw, decorticated ramie fibers as well as enhance fiber tenacity and fineness. The weight loss of the fibers were 24% and 31% better (compared to PL treatment) after 24 and 48 h of processing. These findings have potential implications for the bio-ethanol, bio-fuel and textile industries.