针叶蕨藻对养殖废水中氮盐的净化

Purification of Nitrogen and Phosphorus from Mariculture Effluent by Caulerpa Sertularioides

为了阐明大型海藻针叶蕨藻对海水养殖废水的净化效果,设置针叶蕨藻密度为20,60 120 mg·L^(-1)实验组和无针叶蕨藻的对照组,每组3个重复,分析海水养殖废水中NH_4^+-N、NO_2^--N、NO_3^--N的浓度变化。研究结果表明,各实验组水质处理效果均较好;实验进行8 d后,20 mg·L^(-1)处理组NH_4^+-N去除率为99.91%,NO_3^--N去除率为25.80%,;60 mg·L^(-1)处理组NH_4^+-N去除率99.96%,NO_3^--N去除率为25.39%;120 mg·L^(-1)处理组NH_4^+-N去除率为99.94%,NO_3^--N去除率为64.15%。不同处理组NO_2^--N浓度基本无变化。在NH_4^+-N去除速率方面不同处理组间存在极显著差异(P<0.01)。

Mariculture waste water effluent was treated with Caulerpa sertularioides at the densities of 20 mg·L（-1）,60 mg·L（-1）and 120 mg·L（-1）,three replications each treatment,with a blank as the control to observe the change of the concentrations of NH4＋-N,NO2--N and NO3--N in the mariculture effluent. The results showed that all the treatments had better purification effect than the control. After 8 days of treatment C. sertularioides removed NH4＋-N and NO3-N from the effluent by 99. 91% and 25. 80%,respectively,at the density of20 mg·L（-1）,by 99. 96% and 25. 39%,separately,at the density of 60 mg·L（-1）,and by 99. 94% and 64. 15%,separately,at the density of 120 mg·L（-1）. For all the three treatments the concentration of NO2--N was hardly changed in the effluent. Moreover,the NH4＋-N removal speed by C. sertularioides from the effluent was observed significantly different among the treatments.