期刊
BIORESOURCE TECHNOLOGY
卷 190, 期 -, 页码 321-331出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.04.088
关键词
Aquaculture; Wastewater; Algae; Life cycle assessment; Integrated waste management
资金
- INTERREG IVB NWE program
- Province West-Flanders within the project Energetic Algae (EnAlgae)
- Flemish Government
The environmental sustainability of aquaculture wastewater treatment by microalgal bacterial flocs (MaB-flocs) in an outdoor raceway pond was analyzed using life cycle assessment. Pikeperch aquaculture wastewater treated at pilot scale (Belgium; 28 m(2)) and industrial scale (hypothetical up-scaling; 41 ponds of 245 m(2)) were compared. The integration of the MaB-floc raceway pond in a broader aquaculture waste treatment system was studied, comparing the valorisation of MaB-flocs as shrimp feed and as biogas. Up-scaling improves the resource footprint of the plant (848 MJ(ex),(CEENE) kg(-1) MaB-floc TSS at pilot scale and 277 MJ(ex),(CEENE) kg(-1) MaB-floc TSS at industrial scale) as well as its carbon footprint and eutrophication potential. At industrial scale, the valorisation of MaB-flocs as shrimp feed is overall more sustainable than as biogas but improvements should be made to reduce the energy use of the MaB-floc raceway pond, especially by improving the energy-efficiency of the pond stirring system. (C) 2015 Elsevier Ltd. All rights reserved.
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