Use of anaerobic co-digestion as an alternative to add value to sugarcane biorefinery wastes

[Display omitted] •The anaerobic co-digestion (AcD) of sugarcane biorefinery wastes was investigated.•Hemicelluloses hydrolysate, yeast extract (YE), vinasse and SBFA were used in AcD.•Sugarcane bagasse fly ash (SBFA) act as an adsorbent for toxic compounds during AcD.•The nutritional supplements an...

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Bibliographic Details
Published in:Bioresource technology 2019-09, Vol.287, p.121443-121443, Article 121443
Main Authors: Adarme, Oscar Fernando Herrera, Baêta, Bruno Eduardo Lobo, Filho, Jose Balena Gabriel, Gurgel, Leandro Vinícius Alves, Aquino, Sérgio Francisco de
Format: Article
Language:English
Subjects:
Anaerobic co-digestion
Biogas
Hemicelluloses hydrolysate
Sugarcane bagasse fly ash
Sustainable biorefinery
Vinasse
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Summary:[Display omitted] •The anaerobic co-digestion (AcD) of sugarcane biorefinery wastes was investigated.•Hemicelluloses hydrolysate, yeast extract (YE), vinasse and SBFA were used in AcD.•Sugarcane bagasse fly ash (SBFA) act as an adsorbent for toxic compounds during AcD.•The nutritional supplements and alkalinity for AcD were provided by YE and SBFA.•A positive energy balance was obtained by the net energy generated by AcD system. In this study the anaerobic co-digestion (AcD) of sugarcane biorefinery by-products, i.e. hemicelluloses hydrolysate (HH) (obtained by hydrothermal pretreatment of sugarcane bagasse), vinasse, yeast extract (YE) and sugarcane bagasse fly ashes (SBFA), was optimized by means of biochemical methane potential experiments. The best experimental conditions of AcD (25–75% HH-to-vinasse mixture ratio; 1.0 g L−1 YE; 15 g L−1 SBFA and 100–0% HH-to-Vinasse; 1.5 g L−1 YE; 45 g L−1 SBFA) led to the production of 0.279 and 0.267 Nm3 of CH4 per kg of chemical oxygen demand (COD) with an energy surplus of 0.43 and 0.34 MJ kg SB−1, respectively. Adsorption experiments using SBFA were carried out and showed this residue could adsorb up to 61.71 and 17.32 mg g−1 of 5-hydroxymethyl-2-furfuraldehyde and 2-furfuraldehyde, thereby reducing toxicity and improving biogas production.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2019.121443