Characterisation of water hyacinth with microwave-heated alkali pretreatment for enhanced enzymatic digestibility and hydrogen/methane fermentation

Richen Lin, Jun Cheng, Wenlu Song, Lingkan Ding, Binfei Xie, Junhu Zhou, Kefa Cen

Research output: Contribution to journalArticlepeer-review

101 Scopus citations

Abstract

Microwave-heated alkali pretreatment (MAP) was investigated to improve enzymatic digestibility and H2/CH4 production from water hyacinth. SEM revealed that MAP deconstructed the lignocellulose matrix and swelled the surfaces of water hyacinth. XRD indicated that MAP decreased the crystallinity index from 16.0 to 13.0 because of cellulose amorphisation. FTIR indicated that MAP effectively destroyed the lignin structure and disrupted the crystalline cellulose to reduce crystallinity. The reducing sugar yield of 0.296g/gTVS was achieved at optimal hydrolysis conditions (microwave temperature=190°C, time=10min, and cellulase dosage=5wt%). The sequentially fermentative hydrogen and methane yields from water hyacinth with MAP and enzymatic hydrolysis were increased to 63.9 and 172.5mL/gTVS, respectively. The energy conversion efficiency (40.0%) in the two-stage hydrogen and methane cogeneration was lower than that (49.5%) in the one-stage methane production (237.4mL/gTVS) from water hyacinth with MAP and enzymatic hydrolysis.

Original languageEnglish (US)
Pages (from-to)1-7
Number of pages7
JournalBioresource Technology
Volume182
DOIs
StatePublished - Apr 1 2015
Externally publishedYes

Bibliographical note

Funding Information:
This study was supported by the National Natural Science Foundation – China ( 51176163 , 51476141 ), National High Technology R&D Program – China ( 2012AA050101 ), International Sci. & Tech. Cooperation Program – China ( 2012DFG61770 ), Zhejiang Provincial Natural Science Foundation – China ( LR14E060002 ), Program for New Century Excellent Talents in University – China ( NCET - 11-0446 ), Specialized Research Fund for the Doctoral Program of Higher Education – China ( 20110101110021 ), Science and Technology Project of Guangxi Province – China (1346011-1) and Program of Introducing Talents of Discipline to University – China (B08026).

Publisher Copyright:
© 2015 Elsevier Ltd.

Keywords

  • Hydrogen
  • Methane
  • Microwave-heated alkali pretreatment
  • Water hyacinth

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