Abstract
Since many years the anaerobic digestion (AD) process has been confirmed as an effective technique for converting organic material into methane-rich-biogas. Nonetheless, the complex lignocellulosic biomass (LB) structure impedes the ability of microorganisms to degrade and convert these compounds into biogas through AD. In this context, a pretreatment step is necessary to enhance LB degradability in order to achieve higher biogas production rate and yield. H2O2 of LB (such as pepper plants and eggplant) is a promising approach to increasing the production of biogas in AD among the different pretreatment methods.
This study reports the effects of hydrogen peroxide pretreatment (H2O2) on the C/N ratio and volatile fatty acids (VFA) of pepper plant and eggplant.
The optimal concentration of H2O2 for the use of pretreated pepper plant and eggplant plant was 3% and 1%,respectively reaching 709,5 ± 3,5g N/kg dry matter and 509,3 ± 2,93g N/kg dry matter.
The results showed that the concentration of soluble total nitrogen (STN) of LB increased from 46,0g ± 0,98 g N/kg dry matter to 61,5 ± 1,41 g N/kg dry matter of pepper plant at 3% (H2O2) and from 45,5 ± 0,48g N/kg to 60,7 ± 1,11 g N/kg dry sample of eggplant. Finally, the maximum VFA concentration was reached at 2% of H2O2 in pepper plant (160% higher than the value observed in the raw material) and at 3% of eggplant (238% VFA higher than the original substrate).
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Hamraoui, K., Siles, J.A., Chica, A.F., Santos, M.Á.M., Bari, H.E. (2021). Hydrogen Peroxide Pretreatment of Lignocellulosic Biomass (Pepper Plant and Eggplant) for Anaerobic Digestion. In: da Costa Sanches Galvão, J.R., et al. Proceedings of the 1st International Conference on Water Energy Food and Sustainability (ICoWEFS 2021). ICoWEFS 2021. Springer, Cham. https://doi.org/10.1007/978-3-030-75315-3_36
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DOI: https://doi.org/10.1007/978-3-030-75315-3_36
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