| Citation: |
LUO Yongsheng, LI Zhuojia, WEN Guoliang, CHEN Yongqing. Preliminary studies on density changes of Gracilarla tenuistipitata var. liui used for the purification of shrimp effluent[J]. South China Fisheries Science, 2006, 2(5): 7-11.
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Under laboratory conditions, shrimp aquaculture effluent was treated with six densities of Gracilarla tenuistipitata var.liui (0, 10, 20, 25, 30 and 35 g·L-1) respectively for comparing the efficiency of the degradation of NH4+, NO2-, NO3-, PO43- in 24 h. The obtained results showed that all of the five densities used had obvious positive effects on the degradation of NH4+ and PO43-(P < 0.05). The optimal density of Gracilarla tenuistipitata var.liui for degradation was 30 g·L-1, which can result in 69.69% and 92.62% of relative rates of degradation for NH4- and PO43-, respectively.
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