温度对高负荷生态滤床处理东营市河道水的影响

采用生态滤床对东营市高氯(咸水)河道水进行处理研究,水力负荷控制为5~7 m3/(m2·h)(高出国家标准近5倍),探究不同温度对高负荷生态滤床污染物去除效率的影响。研究结果表明,水温在4~32℃范围内,温度对生态滤床COD、NH4+-N和TP去除率影响较少,污染物去除率较高,验证了势能增氧生态滤床在高氯条件下良好的净化效果。但温度对进水TN浓度影响较大,导致生态滤床对TN去除效果不稳定,推断主要原因是,溶解氧浓度较高和碳源供应不足抑制了反硝化细菌的反硝化反应。

Effects of temperature on treatment of Dongying river water by high load ecological filter bed

The high load ecological filter bed was used for Dongying high chloride (salt water) river water treatment, whose hydraulic load was 5~7 m3/(m2·h) (nearly 5 times higher than national standard). The influence of temperature on the removal efficiency of various pollutants was investigated. The results showed that the removal efficiency of COD, NH4+-N and TP was less affected by the temperature, and the optimal water temperature for the removal of pollutants in the high load ecological filter bed was 4~32℃.The excellent performance of ecological filter bed under high chloride conditions was also proved. However,the influent concentration of TN was greatly affected by the temperature, resulted in removal efficiency of TN was unstable. It was postulated that high concentration of dissolved oxygen and lack of carbon source inhibited the denitrification of denitrifying bacteria.