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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Biobutanol production from sugarcane straw: Defining optimal biomass loading for improved ABE fermentation

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Author(s):
Pratto, Bruna [1, 2] ; Chandgude, Vijaya [2] ; de Sousa Junior, Ruy [1, 3] ; Goncalves Cruz, Antonio Jose [1, 3] ; Bankar, Sandip [2]
Total Authors: 5
Affiliation:
[1] Univ Fed Sao Carlos, Chem Engn Grad Program, Rod Washington Luis Km 235, BR-13565905 Sao Carlos, SP - Brazil
[2] Aalto Univ, Sch Chem Engn, Dept Bioprod & Biosyst, POB 16100, FI-00076 Aalto - Finland
[3] Univ Fed Sao Carlos, Chem Engn Dept, Rod Washington Luis Km 235, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: INDUSTRIAL CROPS AND PRODUCTS; v. 148, JUN 2020.
Web of Science Citations: 0
Abstract

Key objective of this work was to evaluate the use of cellulosic fraction from sugarcane straw pretreated by liquid hot water (LHW) for butanol production via acetone-butanol-ethanol (ABE) fermentation. Separated hydrolysis and fermentation (SHF), and pre-saccharification and simultaneous saccharification and fermentation (PSSF) were investigated at 10 and 15 % w/v biomass loading. For 15 % w/v, the synergistic effect of weak acids and phenolic compounds made the sugarcane straw hydrolysate poorly fermentable. The 10 % w/v solid load was more favorable (similar to 4-fold higher) in both SHF and PSSF strategies with respect to the ABE production, without including a detoxification step. However, PSSF achieved higher ABE titer (10.5 g/L - SHF; 13.5 g/L - PSSF) and productivity (0.09 g/(L.h) - SHF; 0.14 g/(L.h) - PSSF) when compared with SHF. Using best condition (PSSF at 10 % w/v), it would be possible to estimate a yield of 169 L ABE per ton pretreated sugarcane straw (or 84.5 L ABE per ton of raw sugarcane straw), containing 65 L acetone, 95 L butanol, and 9 L ethanol. This result represents a process efficiency of 28 %, based on carbohydrates content in raw material. (AU)

FAPESP's process: 16/10636-8 - From the cell factory to the Biodiesel-Bioethanol integrated biorefinery: a systems approach applied to complex problems in micro and macroscales
Grantee:Roberto de Campos Giordano
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Thematic Grants