Potential of Duckweed for Swine Wastewater Nutrient removal and Biomass Valorisation through Anaerobic Co-digestion
Potential of Duckweed for Swine Wastewater Nutrient removal and Biomass Valorisation through Anaerobic Co-digestion
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DOI：
10.13044/j.sdewes.d5.0137
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发表时间：
2017-06
期刊：
影响因子：
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通讯作者：
Luis Peña;Margarida Oliveira;R. Fragoso;E. Duarte
中科院分区：
文献类型：
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作者：
Luis Peña;Margarida Oliveira;R. Fragoso;E. Duarte
在过去的几十年里，植物净化被认为是一种有效的废水处理技术。本研究报告了一个实验室规模的净化试验猪废水使用浮萍。在猪废水中观察到的最高生长速率为3.1 ± 0.3 gDW m−2 day−1，最高氮和磷吸收量分别为140 mg N m−2 day−1和3.47 mg P m−2 day−1。猪场废水测定中的化学需氧量去除率为58.9 ± 2.0%。此外，通过与猪废水厌氧共消化的生物质增值进行了评估。结果表明，在特定的甲烷生产率（约40%）相比，单一基质厌氧消化明显改善。最高的甲烷比产量，131.0 ± 0.8 mL CH 4 g−1化学需氧量，是在每升预处理的养猪废水中含有100 g浮萍的混合物中获得的。水-养分-能量关系的方法被证明是有前途的猪废物管理。
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.