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Hernández Fernández, Adrián

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Hernández Fernández, Adrián
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Universidad de Murcia. Departamento de Ingeniería Química
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    Sustainable recovery from pig slurry using ionic liquid microbial fuel cells and microalgae consortia
    (Springer, 2026-01-10) Iniesta López, Eduardo; Micol Blaya, Alfredo José; Hernández Fernández, Adrián; Sánchez Zurano, Ana; Garrido, Yolanda; Pérez de Los Ríos, Antonia; Hernández Fernández, Francisco José; Ingeniería Química; Facultades de la UMU::Facultad de Química
    Pig slurry management has emerged as a pressing environmental challenge in the context of rapid population growth and intensified livestock production, highlighting the need for sustainable recovery technologies. While microalgae–bacteria (MB) systems offer promising opportunities for nutrient recycling, the high turbidity of raw pig slurry (PS) typically limits their direct application. This study proposes an innovative two-step treatment that combines microbial fuel cells (MFCs) with MB consortia to enhance both pollutant removal and resource recovery from raw PS with COD levels exceeding 18,000 mg·L⁻1. Unlike conventional designs relying on perfluorinated membranes, the MFCs employed an ionic liquid [N8-10,8–10,8–10,1+][Cl−] as a proton exchange medium, achieving 50% of COD removal and generating 57.27 ± 10.99 mW·m⁻2. The effluent was subsequently treated with MB consortia, yielding biomass productivities of 0.1 to 0.2 g·L⁻1·day⁻1, comparable to chemical fertilizer-based controls. Cell density with pre-treated and untreated pig slurry also matched control levels. In pollutant recovery, the combined microbial fuel cell and microalgae-bacteria treatment achieved up to 67% recovery of COD, over 99% of N-NH4+, and between 65 and 85% of P-PO43−. These findings highlight the potential of integrating MFCs with MB consortia as a strategy for raw pig slurry management, t-ransforming waste into renewable energy and bioresources
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    Transforming waste management: converting pig slurry into clean energy and biomass through integrated MFC-microalgae systems
    (Elsevier, 2025-01) Iniesta López, Eduardo; Hernández Fernández, Adrián; Mellado Gómez, Jorge; Sánchez Zurano, Ana; Garrido, Yolanda; Pérez de Los Ríos, Antonia; Hernández Fernández, Francisco José; Ingeniería Química; Facultades de la UMU::Facultad de Química
    Microbial Fuel Cells are emerging as one of the most promising technologies for simultaneous energy generation and wastewater treatment. At the same time, producing microalgae using wastewater as a growth medium has attracted scientific interest due to its potential to produce valuable products. This study presents a novel integrated system combining Microbial Fuel Cells with a Microalgae-Bacteria consortia to treat pig slurry, while simultaneously generating electrical energy and producing valuable biomass. First, Microbial Fuel Cells incorporating an ionic liquid-based membrane ([N8–10,8-10,8-10,1+][Cl−]) were evaluated as a cost-effective and durable alternative to conventional membranes based on per- and polyfluoroalkyl substances. This approach resulted in significant reductions in COD and BOD, while generating a voltage of 550 mV and a power density of 153 mW·m−2. In the second phase, the treated pig slurry was used as a growth medium for microalgae-bacteria. Different concentrations of pre-treated pig slurry (10 %, 20 %, and 30 %) were tested for their effectiveness in nutrient recovery and biomass production. Notably, 100 % of N-NH4+ and over 60 % of P-PO43− were recovered, with biomass productivity and cell density comparable to the control using chemical fertilizers. This combined system shows strong potential for sustainable pig slurry management, renewable energy generation, and biomass production.
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