组合式三效生态浮床的构建及应用研究

Study on the Construction and Application of Combined Three-effect Ecological Floating Bed

[目的]构建新式生态浮床并测试其性能。[方法]构建一种以浮篮为基本单元,以粉煤灰轻质陶粒和漂珠为装载材料,集成植物吸收、滤料吸附和生物挂膜三重功效于一体的新式生态浮床,并将该浮床单元体用于水体净化模拟试验。[结果]受试水体的TP、TN、NH3-N和COD浓度分别由0.699 9 mg/L、4.898 mg/L、1.945 mg/L和68.34 mg/L降至30 d后的0.003 2 mg/L、0.051 mg/L、0.001 mg/L和6.23 mg/L,水体修复效果快速而显著。试种的青菜、空心菜和美国四季青草长势良好,发芽率和生长速度高于土壤对照组。[结论]三效生态浮床在净水效率、植物种植方式、运行方式及景观价值等方面均较传统生态浮床有了大幅度的改进和提升,并可实现环境和经济的双重收益。

[Objective]The research aimed to study the construction and function test of combined three-effect ecological floating bed.[Method]A new kind of ecological floating bed which took floating baskets as basic units and took fly ash ceramsites and cenosphere as loading material was designed.It integrated plant absorption,filter material adsorption with biological membrane to purify water body.[Result]The results showed that concentrations of TP,TN,NH3-N and COD were reduced from 0.699 9 mg/L,4.898 mg/L,1.945 mg/L and 68.34 mg/L to 0.003 2 mg/L,0.051 mg/L,0.001 mg/L and 6.23 mg/L after 30 days respectively.Three non-aquatic plants of Chinese cabbage,convolvulus and American-four-season-green grass were cultivated in the floating baskets and grew quite well.Germination rate and speed of growth were faster than the controlled group.[Conclusion]The new ecological floating bed was improved in bed body material,plant cultivating pattern,operation mode and landscape value by comparing to traditional ecological floating bed.It can achieve both environmental and economic benefits.