Effect of various pretreatment methods on sugar and ethanol production from cellulosic water hyacinth

Shahabaldin Rezania, Hossein Alizadeh, Junboum Park, Mohd Fadhil Md Din, Negisa Darajeh, Shirin Shafiei Ebrahimi, Bidyut Baran Saha, Hesam Kamyab

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    Abstract

    Effects of acid, alkali, ionic liquid (IL), and microwave-alkali pretreatments on cellulosic water hyacinth (WH) were investigated based on the total reducing sugars (TRS) and ethanol production. For the first time, IL pretreatment with (1-Ethyl-3-methylimidazolium acetate ([EMIM][Ac]) was used for WH, and the efficiency was compared with the other methods. Cellulase and Saccharomyces cerevisiae were fermented together for 72 h. Based on the results, all pretreatment methods effectively increased the sugar content as well as the ethanol yield. Untreated WH had 25 ± 1.5 mg/g of TRS, which was increased to 157 ± 8.2 mg/g, 95 ± 3.1 mg/g, 51 ± 4.2 mg/g, and 45 ± 2.6 mg/g via alkali, microwave-alkali, acid, and IL pretreatments, respectively. The highest TRS level of 402 mg/g was obtained in 24 h and 6.2 ± 0.4 g/L of ethanol in 48 h of fermentation with the alkali-treated WH. The ethanol production was followed by other treatment methods of WH in the order of microwave-alkali, acid, and IL. The results indicated that the ethanol production from WH was related to the type of pretreatment as well as the TRS production.

    Original languageEnglish
    Pages (from-to)592-606
    Number of pages15
    JournalBioResources
    Volume14
    Issue number1
    DOIs
    Publication statusPublished - Feb 1 2019

    All Science Journal Classification (ASJC) codes

    • Environmental Engineering
    • Bioengineering
    • Waste Management and Disposal

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