Reuso de água em um sistema integrado com peixes, sedimentação, ostras e macroalgas

Abstract

Intensive culture effluents have high levels of dissolved nutrients mainly ammonia and others suspended solids. The objective of this work was to use integrated aquaculture with fishes, sedimentation, oysters and macroalgae to improve water quality from a salt water tilapia culture. The fishes water was distributed in three sedimentation aquariums to a 24 h period. Then, water was removed to three oysters aquariums to a equal 24 h period. Later, oysters water was removed to three macroalgae aquariums to more 24 h. Finally, macroalgae water returned to the fishes aquariums. Water turbidity and ammonia, nitrates, nitrites and phosphates concentrations were determined daily. The system was efficient to significantly reduce turbidity and ammonia and phosphates water levels. Nitrates and nitrites levels only were reduced during the sedimentation after system stabilization