Low-energy biomass pretreatment with deep eutectic solvents for bio-butanol production.

Abstract:

:Waste lettuce leaves - from the "fresh cut vegetable" industry - were pretreated with the deep eutectic solvent (DES) made of choline chloride - glycerol. Reaction time (3-16h) and the operation temperature (80-150°C) were investigated. Enzymatic glucose and xylose yields of 94.9% and 75.0%, respectively were obtained when the biomass was pretreated at 150°C for 16h. Sugars contained in the biomass hydrolysate were fermented in batch cultures of Clostridium acetobutylicum DSMZ 792. The energy consumption and the energy efficiency related to the DES pretreatment were calculated and compared to the most common lignocellulosic pretreatment processes reported in the literature. The DES pretreatment process was characterized by lower energy required (about 28% decrease and 72% decrease) than the NAOH pretreatment and steam explosion process respectively. The Net Energy Ratio (NER) value related to butanol production via DES biomass pretreatment was assessed.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Procentese A,Raganati F,Olivieri G,Russo ME,Rehmann L,Marzocchella A

doi

10.1016/j.biortech.2017.06.143

subject

Has Abstract

pub_date

2017-11-01 00:00:00

pages

464-473

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(17)31047-7

journal_volume

243

pub_type

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