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循环水养殖在水产养殖中占有重要地位,水质净化是其核心技术。该文模拟循环水养殖系统,对3种滤布填料(碳纤维、涤纶无纺布、工业滤纸)构成的挂帘式生物滤池进行研究,通过比较3者的氨氮处理效果来筛选最佳滤布填料,并探究最适滤布填料在不同工况条件(流速、温度、初始氨氮浓度)下的最优处理效果。结果表明,碳纤维生物滤池挂膜速度快,生物量多且稳定,对氨氮和亚硝态氮有更好的去除效果;在30℃条件下,初始氨氮为10 mg/L,经过6 h反应,氨氮去除率可达97%;在一定范围内增大流速,会提高其氨氮的去除效率;初始氨氮浓度为15 mg/L时,氨氮平均去除速率达到0.5 mg/(L·h)。以上研究结果为挂帘式生物滤池在循环水养殖水质净化中的应用奠定了实验基础。
Recycled aquaculture plays an important role in aquaculture, and water purification is its core technology. This paper simulates the recirculating aquaculture system to study the three types of filter cloth fillers (carbon fiber, polyester nonwovens, industrial filter paper) consisting of the curtain-type biological filter, by comparing the three ammonia treatment effect to screen the best filter cloth Filler, and explore the optimal filter cloth filler under different conditions (flow rate, temperature, initial ammonia concentration) under the optimal treatment effect. The results showed that the biofilter of carbon fiber has the advantages of quick film-forming speed, high biomass and stability, better removal of ammonia nitrogen and nitrite nitrogen. Under the condition of 30 ℃, the initial ammonia nitrogen is 10 mg / L, after 6 h reaction , Ammonia nitrogen removal rate of up to 97%; within a certain range to increase the flow rate will increase the ammonia nitrogen removal efficiency; ammonia nitrogen initial concentration of 15 mg / L, the average removal rate of ammonia nitrogen reached 0.5 mg / (L · h). The above results provide experimental basis for the application of the curtain-type biological filter in the water purification of recirculating aquaculture.