Performance of Conical Spouted Beds Technology for Anaerobic Digestion of Wastes from Wine Production

The wine production generates a large amount of organic wastes, such as skins and scrapes; lees; and vinasse [1], suitable for valorization. The anaerobic digestion produces a methane-rich biogas and and an organic by-product, a digestate, which requires pretreatment for later use for fertilization of fields or as compost. The Spouted Beds technology has been successfully applied for treatment of biomass wastes [2-6].

In this paper, a conical spouted bed has been applied for valorization of grape skins and scrapes wastes by anaerobic digestion. The digestión has been performed with different percentages of substrate and inoculum under temperature in the mesophilic and thermofilic ranges (between 35 and 55 ºC), for times between 3 and 6 weeks. The methane content in the generated biogas, measured by the Geotech Biogas-5000 analyzer, was higher than 52%.

Acknowledgements

This work was performed with financial support from the Spanish Ministry of Economy and Competitiveness and co-funded by the European Union through ERDF funds (Projects CTQ2014-59312-P and CTQ2017-89199-P).

References

[1] Wine Institute, OIV report on the world vitivinicultural situation (2017).

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[3] San José, M.J., Alvarez, S., García, Peñas, F.J., Fuel 110 (2013b) 178.

[4] San José, M.J., Alvarez, S., Peñas, F.J., García, I, Chem. Eng. J. 238(15) (2014a) 227.

[5] San José, M.J., Alvarez, S., García, Peñas, F.J., Chem. Eng. Res. Des. 92 (2014b) 672.

[6] San José, M.J., Alvarez, S., López, R., Catal. Today 305 (2018) 13-18.