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https://doi.org/10.13044/j.sdewes.d5.0137

Potential of Duckweed for Swine Wastewater Nutrient removal and Biomass Valorisation through Anaerobic Co-digestion

Luis Pena ; Instituto Superior de Agronomia, University of Lisbon, Tapada da Ajuda 1349-017, Lisboa, Portugal
Margarida Oliveira ; Escola Superior Agrária de Santarém, Politecnic Institute of Santarém, Quinta do Galinheiro, São Pedro 2001-904, Santarém, Portugal
Rita Fragoso ; Instituto Superior de Agronomia, University of Lisbon, Tapada da Ajuda 1349-017, Lisboa, Portugal
Elizabeth Duarte ; Instituto Superior de Agronomia, University of Lisbon, Tapada da Ajuda 1349-017, Lisboa, Portugal


Puni tekst: engleski pdf 673 Kb

str. 127-138

preuzimanja: 608

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Sažetak

Over the last decades, phytodepuration has been considered an efficient technology to treat wastewaters. The present study reports a bench scale depuration assay of swine wastewater using Lemna minor. The highest observed growth rate obtained in swine wastewater was 3.1 ± 0.3 gDW m−2 day−1 and the highest nitrogen and phosphorus uptake were 140 mg N m−2 day−1 and 3.47 mg P m−2 day−1, respectively. The chemical oxygen demand removal efficiency in the swine wastewater assay was 58.9 ± 2.0%. Furthermore, the biomass valorisation by anaerobic co-digestion with swine wastewater was assessed. Results showed a clear improvement in specific methane production rate (around 40%) when compared to mono-substrate anaerobic digestion. The highest methane specific
production, 131.0 ± 0.8 mL CH4 g−1 chemical oxygen demand, was obtained with a mixture containing 100 g of duckweed per liter of pre-treated swine wastewater. The water-nutrients-energy nexus approach showed to be promising for swine waste management.

Ključne riječi

Anaerobic co-digestion, Biogas, Biomass production, Duckweed, Lemna minor, Swine slurry

Hrčak ID:

181486

URI

https://hrcak.srce.hr/181486

Posjeta: 1.155 *