Separation of reducing sugars from lignocellulosic hydrolysate: Membrane experiments & system dynamic modelling
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Kuupäev
2020
Kättesaadav alates
Autorid
Weerasuriya Arachchige, A.R.P.P.
Mezule, L.
Juhna, T.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Separation of fermentable sugars after hydrolysis of lignocellulosic biomass plays a
vital role in second-generation biofuel production. Byproducts and solid fractions generated
during pretreatment and hydrolysis can have adverse effects on fermentation efficiency. Previous
studies have shown that a maximum of 40% (w/w) of sugar yield can be obtained by sequential
UF and NF permeate recovery. This study aimed to introduce a multi-step membrane filtration
process to recover fermentable sugars while removing inhibitory bi-products. Fermentable sugar
recovery was investigated using a recirculation flow between various stages of separation. The
experimental results demonstrated that by introducing NF permeate recirculation to the UF unit
a sequential UF/NF system can achieve 60% (w/w%) recovery of reducing sugars. Based on the
experimental results, a ‘Simultaneous ultrafiltration and nanofiltration model’ was developed
using system dynamics. The model was used to predict the final sugar concentration and sugar
yield using sugar permeability in each membrane as the dynamic variability. The model predicts
that high sugar permeability (or selective permeability) through the ultrafiltration mostly affects
the efficiency of the system, which still is a challenge.
Kirjeldus
Märksõnad
lignocellulosic biomass, fermentable sugars, membrane separation, system dynamic modelling, articles