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oai:uvadoc.uva.es:10324/535892022-05-30T20:51:36Zcom_10324_1173com_10324_931com_10324_894col_10324_1371

Anaerobic digestion of food waste coupled with biogas upgrading in an outdoors algal-bacterial photobioreactor at pilot scale Marín de Jesús, David Fernando Méndez Rodríguez, Lara Suero Martín, Irene Blanco, Saúl Fernández-Polanco Íñiguez de la Torre, María Muñoz Torre, Raúl Photobioreactors Fotobioreactores Anaerobic digestion Digestión anaeróbica Biomethane Biometano Producción Científica This work aimed at integrating the anaerobic digestion of food waste (FW) with photosynthetic biogas upgrading at pilot scale in order to obtain a high quality biomethane and a nutrient-laden algal biomass as the main byproducts from FW treatment. The performance of a 100 L anaerobic digester treating food waste integrated via raw biogas and digestate injection with a 1.2 m2 outdoors high-rate algal pond (HRAP) was evaluated. Biogas production in the digester averaged 790 ± 89 mL g VSin-1 (68 ± 8 L d-1) (35 °C, 1 bar) at a loading rate of 0.86 g VS L-1 d-1 and a steady state chemical oxygen demand removal efficiency of 83 ± 7%. The biogas produced (60% CH4 / 39% CO2) was upgraded in a 2.5 L absorption column interconnected with the HRAP via culture broth recirculation at a liquid to biogas ratio of 2, resulting in a maximum CO2 removal efficiency of 90% and a maximum CH4 content of 93.9%. The HRAP, supplied with the centrifuged liquid digestate supplemented with synthetic wastewater (5.0 ± 1.1 L d-1, Total nitrogen (TN) = 793 ± 110 mg N L-1, P-PO43- = 39 ± 19 mg P L-1), supported TN and total phosphorus maximum removal efficiencies of 100% in both cases. Pseudoanabaena sp. and Chlorella vulgaris were identified as the dominant species. Junta de Castilla y León - Fondo Europeo de Desarrollo Regional (projects CLU 2017-09, CL-EI-2021-07 and UIC 315) Ministerio de Ciencia, Innovación y Universidades (grant FJC 2018-038402-I) 2022-05-30T09:23:24Z 2022-05-30T09:23:24Z 2022 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Fuel, 2022, vol. 324, Part A, 2022, 124554 0016-2361 https://uvadoc.uva.es/handle/10324/53589 10.1016/j.fuel.2022.124554 eng https://www.sciencedirect.com/science/article/pii/S001623612201403X?via%3Dihub#ak005 Attribution-NonCommercial-NoDerivatives 4.0 Internacional info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ © 2022 The Authors application/pdf Elsevier https://uvadoc.uva.es/bitstream/10324/53589/4/Anaerobic-digestion-food-waste.pdf.jpg Hispana TEXT http://creativecommons.org/licenses/by-nc-nd/4.0/ UVaDOC. Repositorio Documental de la Universidad de Valladolid https://uvadoc.uva.es/handle/10324/53589