Shrimp aquaculture e¥uents were bioremediated in a two-phase system (System A) using the black clam Chione £uctifraga and the benthic microalgae Navicula sp., and then reused to farm whiteleg shrimp Litopenaeus vannamei. In the experimental design, Systems B and C had an identical structure as System A, but no clams or microalgae were added. System B received the same shrimp e¥uents while System C received only estuarine water. Shrimp raw e¥uents had a poor water quality. System A improved the water quality by decreasing the concentrations of total nitrogen, total ammonia nitrogen (TAN), nitrites, nitrates, phosphates, total suspended solids (TSS) and organic suspended solids (OSS). System B also decreased the concentration of TAN, TSS and OSS via sedimentation, but the e¡ect was less pronounced than that observed in System A. Shrimp reared in the bioremediated e¥uents (System A) had better production (3166 kg ha À 1 ) and higher survival (89.2%) than those reared in e¥uents from Systems B (2610 kg ha À 1 ,75.1%) and C (2874 kg ha À 1 ,82.1%). It is concluded that the bioremediation system was moderately e⁄cient and the bioremediated e¥uents were suitable to farm L. vannamei.

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