Abstract
A combined aquaculture-algae system was developed for the purification and reuse of effluent water from intensive fish production in a combination of a high-rate algal pond and extensive fishpond. The integrated system was operated as a closed system, thus the water demand was reduced through the recirculation of the treated water. The pilot-scale experimental system consisted of three different compartments: tanks for intensive fish production, an algal pond where the excess nutrients are removed by algae uptake and a fishpond where the produced algae biomass was consumed by fish. The objective of this study was to describe and evaluate the nutrient transformation efficiency of the combined system through the analysis of the organic carbon, nitrogen and phosphorus budgets.
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