Dark fermentation, anaerobic digestion and microbial fuel cells: An integrated system to valorize swine manure and rice bran
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Andrea Schievano [1] ; Tommy Pepè Sciarria [1] ; Yong Chang Gao [2] ; Barbara Scaglia [1] ; Silvia Salati [1] ; Marina Zanardo [3] ; Wei Quiao [2] ; Renjie Dong [2] ; Fabrizio Adani [1]
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[1] University of Milan
University of Milan
Milán, Italia
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[2] China Agriculture University
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[3] University of Padova
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- Localización: Waste management, ISSN-e 0956-053X, Vol. 56, 2016, págs. 519-529
- Idioma: inglés
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Resumen
This work describes how dark fermentation (DF), anaerobic digestion (AD) and microbial fuel cells (MFC) and solid-liquid separation can be integrated to co-produce valuable biochemicals (hydrogen and methane), bioelectricity and biofertilizers. Two integrated systems (System 1: AD + MFC, and System 2: DF + AD + MFC) are described and compared to a traditional one-stage AD system in converting a mixture (COD = 124 ± 8.1 gO2 kg−1Fresh Matter) of swine manure and rice bran. System 1 gave a biomethane yield of 182 LCH4 kg−1COD-added, while System 2 gave L yields of bio-hydrogen and bio-methane of 27.3 ± 7.2 LH2 kg−1COD-added and 154 ± 14 LCH4 kg−1COD-added, respectively. A solid-liquid separation (SLS) step was applied to the digested slurry, giving solid and liquid fractions. The liquid fraction was treated via the MFC-steps, showing power densities of 12–13 W m−3 (500 Ω) and average bioelectricity yields of 39.8 W h kg−1COD to 54.2 W h kg−1COD.
