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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.)

Acidic and thermal pre-treatments for anaerobic digestion inoculum to improve hydrogen and volatile fatty acid production using xylose as the substrate

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Mockaitis, Gustavo [1, 2] ; Bruant, Guillaume [1] ; Guiot, Serge R. [1] ; Peixoto, Guilherme [2, 3] ; Foresti, Eugenio ; Zaiat, Marcelo
Total Authors: 6
[1] Natl Res Council Canada, Anaerob Technol & Bioproc Control Grp, Energy Min & Environm Portfolio, NRC, 6100 Royalmount Ave, Montreal, PQ H4P 2R2 - Canada
[2] Univ Estadual Campinas, Interdisciplinary Res Grp Biotechnol Appl Agr & E, Sch Agr Engn, GBMA, FEAGRI, UNICAMP, 501 Candido Rondon Ave, BR-13083875 Campinas, SP - Brazil
[3] Univ Estadual Paulista, Fac Pharmaceut Sci Araraquara, Bioproc & Biotechnol Dept, FCFAR, UNESP, Araraquara Jau Rd, Km 01, Campus Univ, BR-14801902 Araraquara, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: RENEWABLE ENERGY; v. 145, p. 1388-1398, JAN 2020.
Web of Science Citations: 2

Xylose is a by-product of lignocellulosic biomass processing for production of second-generation biofuels and could be suitable for bioproduct manufacturing. This paper describes an innovative approach that enables the system to achieve high yielding for hydrogen production. The study compared 4 physico-chemical pre-treatments performed in an anaerobic mixed culture (acidic, thermal, acidic-thermal and thermal acidic) to achieve an inoculum with a high-efficiency xylose to hydrogen conversion under mesophilic conditions (30 degrees C). The acidic pre-treatment was the most efficient to select microorganisms able to produce hydrogen and volatile acid from xylose. Kinetics has shown that acidic pre-treatment had a hydrogen/xylose molar yielding factor of 1.57 (molar base) and a hydrogen maximum production rate of 253 mL H-2 h(-1). Mass balance considered all possible metabolic pathways using xylose as a substrate. Anaerobic degradation of ethanol was the most active pathway for hydrogen production in all experiments, except for the control. Each pre-treatment performed for the original inoculum resulted in different microbiological profiles, but the genus Clostridium was the most abundant in all assays. Acidic pre-treatment stimulated the growth of organisms from the genera Peptostreptococcaceae, Truepera and Kurthia, which could be related to the better results in hydrogen production found in this condition. (C) 2019 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 13/18172-2 - Anaerobic fermentation of products from acidogenic digestion of sugarcane bagasse pentose liquor for ethanol and butanol production
Grantee:Gustavo Mockaitis
Support type: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 09/15984-0 - Bioenergy production from wastewaters and environmental fitting of liquid and solid wastes generated
Grantee:Marcelo Zaiat
Support type: Research Projects - Thematic Grants
FAPESP's process: 10/18463-9 - Fundaments of bioprocessing of sugar cane bagasse hydrolised to organic acids as subproducts and H2 as energetic source
Grantee:Gustavo Mockaitis
Support type: Scholarships in Brazil - Post-Doctorate