Journal
BIORESOURCE TECHNOLOGY
Volume 266, Issue -, Pages 116-124Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.06.069
Keywords
Anaerobic co-digestion; Renewable energy; Agroindustrial residues; Sulfuric acid; Alkaline hydrogen peroxide
Funding
- CNPq, Brazil [306558/2014-9]
- CAPES, Brazil [MCTI/FINEP/CT-INFRA - PROINFRA - 02/2014]
- CAPES-PNPD, Brazil
- FAPERGS, Brazil [17/2551-0001 086-8]
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Different pretreatments were evaluated on corn stalk (Zea mays) applied as a lignocellulosic source in anaerobic co-digestion with swine manure, using sulfuric acid (H2SO4) and hydrogen peroxide (H2O2) for biogas production purposes. Using H2SO4 we achieved a 75.1% removal of the hemicellulose fraction, in low acid concentrations (0.75% v.v(-1)). However, this technique inhibited the co-digestion process. Pretreatment with 12% of H2O2 (pH 11.5) increased the cellulose fraction by 73.4% and reduced the lignin content by 71.6%. This pretreatment is recommended for biogas production, as it increased the final volume of biogas by 22% and reduced the digestion time by one third. So, a promising alternative was obtained in order to facilitate the anaerobic digestion of the carbohydrates present in this biomass.
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