Open AccessEVALUATION OF BIOHYDROGEN PRODUCTION FROM SUGARCANE VINASSE IN AN ANAEROBIC FLUIDIZED BED REACTOR WITHOUT PH CONTROL
Author(s) -
Georgia Nayane Silva Belo Gois,
Williane MacÃado,
Fernanda Santana Peiter,
Taciana Carneiro Chaves,
VinÃcius Sales,
Pablo André Moreira de Almeida Barbosa,
A. K. S. Abud,
Eduardo Lucena Cavalcante de Amorim
Publication year - 2020
Publication title -
latin american applied research
Language(s) - English
Resource type - Journals
eISSN - 1851-8796
pISSN - 0327-0793
DOI - 10.52292/j.laar.2021.504
Subject(s) - biohydrogen , vinasse , hydraulic retention time , pulp and paper industry , chemistry , biogas , bioreactor , anaerobic exercise , anaerobic digestion , fluidized bed , hydrogen production , waste management , hydrogen , wastewater , methane , fermentation , food science , environmental science , environmental engineering , biology , physiology , organic chemistry , engineering
This study aimed to produce biohydrogen from sugarcane vinasse in an anaerobic fluidized bed reactor operated at ambient temperature (26-35 °C) with a progressive increase of the organic load rate (OLR) (17-155 kg-COD m-3 d-1) and without influent pH control. Hydraulic retention times (HRT) of 12, 6 and 4 h were applied to increase the OLR. The highest hydrogen yield, hydrogen production rate and percentage of hydrogen in the biogas were obtained in the HRT of 4 h, corresponding to the values of 2.40 mol-H2 mol-1-carbohydrate, 0.33 L-H2 h-1 L-1-reactor, and 33%, respectively. The butyric acid fermentative route was favored in the process. The PCR/DGGE analysis showed that the microbial community structure was modified along operational stages and increasing OLR caused an increase in microbial diversity. The results indicate that biohydrogen production from anaerobic digestion of sugarcane vinasse can be achieved with no alkalization pretreatment.