羽毛藻对石斑鱼养殖废水中氮和磷的吸收特征

Absorption Characteristics of Phosphorus and Nitrogen by Caulerpa sertularoides f. Longipes in Grouper Aquaculture Wastewater

[目的]探讨羽毛藻作为养殖池塘生物过滤器对海水养殖废水的净化作用。[方法]通过在石斑鱼养殖废水中接种适量羽毛藻藻体,测定其对养殖废水中氮、磷营养盐的吸收效果。[结果]羽毛藻对氨氮、硝酸盐的去除率作用较强,第5天对氨氮的吸收率可达97.5%,第2天对硝酸盐氮的吸收率可达96.7%,对于磷酸盐的吸收不明显,通过对氨氮和硝酸盐氮的吸收作用可以将水体中亚硝酸盐氮浓度维持在一个相对较低的水平。[结论]羽毛藻对氨氮、硝酸盐的去除作用较强,可将羽毛藻作为养殖废中水处理接种藻体的一个备选品种。

[Objective] To study the effect of Caulerpa sertularoides f. Longipes as a biotilter in the marine aquaculture wastewater purification. [Method] Absorption effect of nitrogen and phosphorus nutrients was studied through inoculating the amount of C. sertularoides in grouper aqua- culture wastewater. [Result] C. sertularoides had a significantly high removal rate for ammonia nitrogen and nitrate, the absorption rate for ammonia nitrogen reached 97.5% at the fifth day and nitrate absorption rate at the second day reached 96.7%. The phosphate absorption was not obvious. Through absorption of ammonia nitrogen and nitrate nitrogen, nitrite nitrogen concentration in water could be maintained at a relatively low state at the same time. [ Conclusion] The removal effect of ammonia nitrogen and nitrate is stronger, and can be used alternation of vaccination algal species with C. sertularoides as factory circulating water aquiculture system.