循环流水产养殖系统净化研究

摘要

文章研究了不同水力停留时间和壳聚糖的投加对循环流水产养殖系统的影响，结果表明，当水力停留时间为8h，系统内除磷，除氨氮、COD效果明显，通过生物滤池和植物滤池的去除，NO2^-浓度下降，植物滤池平均出水浓度总磷1．60mg／L、氨氮0．016mg／L、COD为21．788mg／L；养鱼池投加壳聚糖，出水的色度和浊度都明显降低。%This paper studied the influence of different hydraulic retention time and chitosan additive on recirculating aquaculture system. The results show that, when the hydraulic retention time was 8 h, the removal efficiency of phosphorus, ammonia nitrogen and COD was high. Through the bio - filter and plants filter, the NO2^- concentration dropped. In the effluent of plant filter, the average concentration of phosphorus, ammonia nitrogen and COD was 1.60 mg/L, 0. 016 mg/L and 21. 788 rag/L, respectively. The turbidity and chromaticity were obviously reduced by dosing ehitosan in the fish pond.