title: Sequential hydrolysis of waste newspaper and bioethanol production from the hydrolysate.
abstract: A practical process was developed for production of a high quality hydrolysate of waste newspaper that ensured its complete fermentability to bioethanol. After pretreatment with 0.1N NaOH for 12h and sequential acid and enzyme hydrolysis, 10.1g/L of glucose (50.5%), 1.38 g/L of mannose (6.9%) and 0.28 g/L of galactose (1.4%), a total of 11.76 g/L of fermentable sugars was obtained, which accounts for 88.7% of saccharification efficiency. The Saccharomyces cerevisiae BCRC20271 showed excellent co-fermentability of glucose, mannose and galactose in hydrolysate of waste newspaper. After cultivation of the hydrolysate at 24°C in static culture for 48 h, the final ethanol concentration of 5.72 g/L (96% conversion efficiency) was produced. Overall, 1000 kg of waste newspaper will produce 286 kg (362 L) of ethanol by the process developed, which reveals that waste newspaper has higher potential than many other lignocellulosic and seaweed feedstocks for bioethanol production.
authors: Department of Bioindustry Technology, Da-Yeh University, Changhua, Taiwan.
authors: Fang-Chen
authors: FC
authors: Wu
authors: Department of Environmental Engineering, Da-Yeh University, Changhua, Taiwan.
authors: Shu-Sing
authors: SS
authors: Huang
authors: Department of Environmental Engineering, Da-Yeh University, Changhua, Taiwan. Electronic address: ils@mail.dyu.edu.tw.
authors: Ing-Lung
authors: IL
authors: Shih
mesh_terms: D056804:Biofuels; D001709:Biotechnology / Q000379:methods*; D050260:Carbohydrate Metabolism / Q000187:drug effects; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation / Q000187:drug effects; D005662:Furaldehyde / Q000031:analogs & derivatives / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis / Q000187:drug effects; D009524:Newspapers as Topic; D012441:Saccharomyces cerevisiae / Q000187:drug effects / Q000378:metabolism; D012972:Sodium Hydroxide / Q000494:pharmacology; D013997:Time Factors; D014866:Waste Products
chemical_list: D056804:Biofuels; D014866:Waste Products; D000431:Ethanol; D012972:Sodium Hydroxide; C008046:5-hydroxymethylfurfural; D005662:Furaldehyde
keywords: Bioethanol; Fermentation; Hydrolysis; Lignocellulosics; Waste newspaper