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突发性藻类污染常常伴随着藻类的肆意滋生,从而严重影响着水厂的正常运行,更加威胁着居民用水的水质安全。采用弹性填料生物接触氧化工艺处理含藻原水,分析考察了不同水力停留时间、气水比和藻类浓度条件下反应器对藻类去除效果的影响。结果表明,最佳HRT为1.0 h,最佳气水比为1.2∶1;采用最佳工艺条件处理叶绿素a(Chl-a)为70mg/m3的高藻原水时,Chl-a、CODMn和NH+4-N的去除率分别达到65.48%、47.81%和70.54%,且CODMn和NH+4-N的出水浓度能够达到东深供水工程处理目标。说明在该最佳工艺条件下,原水中藻类能够被有效地控制和去除,出水水质稳定,工艺适应性强。
Sudden algae pollution is often accompanied by the indiscriminate breeding of algae, which seriously affects the normal operation of the water plant, threatening the water quality of residential water safety. The algae-containing water was treated by the elastic-filler biological contact oxidation process, and the effect of the reactor on the removal of algae was investigated under different hydraulic retention time, gas-water ratio and algae concentration. The results showed that the optimal HRT was 1.0 h and the optimal ratio of gas to water was 1.2:1. Chl-a, CODMn and NH The removal efficiencies of + 4-N reached 65.48%, 47.81% and 70.54% respectively, and the effluent concentrations of CODMn and NH + 4-N reached the target of Dongshen water supply project. It shows that algae in raw water can be effectively controlled and removed under the optimum process conditions. The effluent quality is stable and the process adaptability is strong.