复合水平流人工湿地对氮和有机污染物的 去除效果和动态变化

将半咸水(S=7.5±0.1)复合水平流人工湿地同室内水泥池养殖暗纹东方鲀(Takifugu obscurus)结合,构建室内集约化养殖—湿地生态系统,研究了人工湿地处理养殖循环用水过程中,湿地不同沿程处理系统对NH4+-N、NO2--N、NO3--N、TSS和COD的去除规律和动态变化.结果表明,人工湿地对上述水质指标有良好的净化效果,NH4+-N平均去除率66.37％,NO2--N平均去除率97.68％,NO3--N平均去除率7.63％,TSS平均去除率80.39％,COD平均去除率16.50％.各水质指标在湿地床内的动态模型可表示为曲线:CL=C0·exp(K1L2+K2L+K).

Nitrogen and organic matter removal efficiency and dynamic feature of integrated horizontal constructed wetlands

An integrated horizontal constructed wetland was integrated into an indoor recirculating aquaculture system for culturing obscure puffer (Takifugu obscurus). The aim of the study was to examine dynamic characteristics of NH₄⁺-N, NO₂^--N, NO₃^--N, TSS, and COD during the treatment of integrated horizontal constructed wetland under the condition of brackish water (7.4-7.6, salinity). The mean removal efficiency of NH₄⁺-N, NO₂^--N, NO₃^--N, TSS, and COD was 66.37%, 97.68%, 7.63%, 80.39%, and 16.50%, respectively, during recirculation process. According to each characteristic dynamic curve, a model was set up as follows: C_L=C₀ ·exp(K₁L²+K₂L+K₃).