Purification of Nitrogen and Phosphorus from Mariculture Effluent by Caulerpa Sertularioides

Key words: 
• Caulerpa sertularioides /
• density /
• effluent treatment

Abstract: Mariculture waste water effluent was treated with Caulerpa sertularioides at the densities of 20 mg·L^-1,60 mg·L^-1and 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 of 20 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.