基于玄武岩纤维载体的生物膜法净化污染河道水体

为考察不同水体环境状况下,所构建的基于玄武岩纤维的污染河道水体净化技术的净化效能,通过模拟不同pH、温度及DO的污染河道水体环境,研究了水体中的COD、氨氮及TP指标变化规律,得到所构建的净化技术对COD、氨氮及TP的削减速率。研究结果表明,不同温度环境下COD、氨氮及TP的净化效率会随着时间增加而增强;不同DO环境下COD、氨氮及TP的净化效率随时间增加而增强;不同pH条件下COD净化效率随着时间增加而持续增强,氨氮净化效率随时间增加至某一极值后趋于平稳,而TP的净化效率会随着时间增加表现先升高后降低的趋势。此外,实验期间不同水体环境下COD、氨氮与TP皆在温度20~25℃,pH为7,DO为2~4 mg/L时分别获得93%、90%和36%的最大净化效率;根据实验结果得出的最适宜水体环境为温度20~25℃,pH为7,DO为2~4 mg/L;COD、氨氮及TP削减速率分别为0.63~0.84、3.6×10-3~4.0×10-2和7.1×10-4~2.9×10-3 kg/(m3·d)。

Purification of polluted river water by biofilm process based on basalt fiber carrier

In order to investigate the performance of the purifying technology for polluted river water by biofilm process based on basalt fiber carrier under different water bodies environmental conditions,the changing rules of COD,NH3-N and TP were studied by simulating different pH,temperatures and DO polluted river water environment,and then the cut rates of the purification technology for COD,NH3-N and TP were got.The results showed that the purifying rate of COD,NH3-N and TP increased with time at different temperatures and DO environmental conditions,and the purifying rate of COD increased with time at different pH,and the purifying rate of NH3-N increased with time until reaching the maximum value and then leveled off at different pH,and the purifying rate of TP increased first and then decreased with time at different pH,and the maximum purifying rate of COD,NH3-N and TP reached 93%,90% and 36%,respectively under the optimum environmental conditions(temperature of 20~25℃,pH of 7 and DO of 2~4 mg/L),and the rate cuts of COD,NH3-N and TP were 0.63~0.84 kg/(m3·d),3.6×10-3~4.0×10-2 kg/(m3·d) and 7.1×10-4~2.9×10-3 kg/(m3·d),respectively.