冬-春季节浮床技术净化重污染河水的动态试验研究

Dynamic pilot study on purification of heavily polluted river water with floating bed technology in winter-spring

以苏州市重污染河道水体为研究对象，在冬-春季节进行利用浮床技术种植水芹菜净化重污染河水的动态试验．研究结果表明，进水ID（TN）和ρ（TP）分别为7．05-9．99mg／L和0．29～0．73mg／L，水芹菜能正常生长，在水力负荷为0.5m^3／（m^2·d）的奈件下，水芹菜浮床对重污染河水中的NH3·N，TP，TN的去除率与水温正相关，对藻类的抑制作用稳定；营养盐的去除负荷随原水质量浓度的增加而增大．水芹菜是冬-春季节净化重污染河道的经济有效的生物材料．

A dynamic pilot study on purification of heavily polluted river water by planting Oenanthe javanica with floating bed technology was performed. Some conclusions were drawn： Oenanthe javanica grew normally when TN and TP concentrations in raw water were 7.05-9.99 mg/L and 0.29-0.73 mg/L respectively; with the hydraulic load being 0.5 m^3/（ m^2·d）, the removal rates of NH3-N, TP, and TN from heavily polluted river water by Oenanthe javanica floating bed were positively related to water temperature, and it inhibited the growth of algae stably; the mean removal rate of nutritive salt increased with the concentration of raw water. As a result, Oenantthe javanica is an economical and effective biological material for purification of heavily polluted river courses in winter-spring.