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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.)

Kinetics of thermophilic acidogenesis of typical Brazilian sugarcane vinasse

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Koyama, Mirian Harumi ; Araujo Junior, Moacir Messias ; Zaiat, Marcelo ; Nunes Ferraz Junior, Antonio Djalma
Total Authors: 4
Document type: Journal article
Source: ENERGY; v. 116, n. 1, p. 1097-1103, DEC 1 2016.
Web of Science Citations: 2

The kinetics of the acidogenic phase during anaerobic digestion of sugarcane vinasse in differential reactors containing immobilized cells was investigated. The maximum substrate conversion rate (r(max)), substrate saturation constant (K-s) and constant of inhibition by excess substrate (K-is) were determined using vinasse with and without pH adjustment. Simulation and scaling-up of a thermophilic-hydrogen production system were performed. The r(max), values obtained at different pH were similar and near 0.9 mg-Total carbohydrates g-VS-1 h(-1). The K-s obtained from the system without pH adjustment was 10,762.3 mg-Total carbohydrates L-1 (i.e., 2.5 times higher than the system with pH adjustment). No inhibition by excess substrate was achieved in the system without pH adjustment, indicating that sugarcane vinasse can be used to produce hydrogen without input costs. The simulation revealed that hydrogen production is a sensitive process that requires careful balancing of various operational parameters. The payback for the investment in system implementation is 4.4 years. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 13/15665-8 - Structure and functional dynamics of microbial community of anaerobic digesters applied to energy recovery and environmental framework of wastes generated in bioethanol production of 1st and 2nd generation
Grantee:Antônio Djalma Nunes Ferraz Júnior
Support type: Scholarships in Brazil - Post-Doctorate
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: 15/21650-9 - Applied metagenomics for biofuels development and environmental sustainability in biorefineries based on sugarcane
Grantee:Antônio Djalma Nunes Ferraz Júnior
Support type: Scholarships abroad - Research Internship - Post-doctor