Effect of various types of thermal pretreatment techniques on the hydrolysis, compositional analysis and characterization of water hyacinth

•Water hyacinth’s shocking reproduction capability is of great concern worldwide.•Anaerobic digestion is the ultimate solution for managing this weed.•The weed’s lignocellulosic matrix delays hydrolysis and reduces biogas production.•Four types of thermal pretreatment techniques were studied to spee...

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Bibliographic Details
Published in:Bioresource technology 2017-03, Vol.227, p.147-154
Main Authors: Barua, Visva Bharati, Kalamdhad, Ajay S.
Format: Article
Language:English
Subjects:
Air
Bio-chemical methane potential
Eichhornia - chemistry
Eichhornia - metabolism
Hot air oven
Hydrolysis
Lignocellulose
Methane - biosynthesis
Microscopy, Electron, Scanning - methods
Microwaves
Plant Weeds - chemistry
Plant Weeds - metabolism
Solubility
Spectroscopy, Fourier Transform Infrared
Thermal pretreatment
Water hyacinth
X-Ray Diffraction
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Summary:•Water hyacinth’s shocking reproduction capability is of great concern worldwide.•Anaerobic digestion is the ultimate solution for managing this weed.•The weed’s lignocellulosic matrix delays hydrolysis and reduces biogas production.•Four types of thermal pretreatment techniques were studied to speed up hydrolysis.•Hot air oven pretreatment is the most efficient type of thermal pretreatment. The aim of this work was to study the effect of four different types of thermal pretreatment techniques i.e., hot air oven, microwave, autoclave and hot water bath on the hydrolysis, compositional analysis and characterization of water hyacinth. To determine the most efficient thermal pretreatment technique exhibiting enhanced solubilisation. Highest solubilisation was achieved by hot air oven (55.5%), followed by microwave, hot water bath and autoclave. Bio-chemical methane potential (BMP) test of hot air oven pretreated and untreated water hyacinth was conducted. Cumulative methane production of 3039±32mLCH4/gVS was achieved by hot air oven pretreated water hyacinth at 90°C for 1h which was way higher than the cumulative methane production of untreated water hyacinth 2396±19mLCH4/gVS on the 35th day. Compositional analysis and characterization of water hyacinth were also investigated to study the changes in the pretreated samples.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2016.12.036