生物接触氧化法应急处理原水突发性藻类污染

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70 mg/m3的高藻原水时,Chl-a、CODMn和NH4+-N的去除率分别达到65.48%、47.81%和70.54%,且CODMn和NH4+-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。

Emergency treatment of sudden algae pollution in raw water by contact oxidation process

The sudden algae pollution in eutrophic water can hardly be effectively removed by conventional process,thus can seriously affect the quality of drinking water.Biological contact oxidation process was used to treat algae-laden raw water and research the effects of algae removal under different HRTs,air-waters ratios and concentrations of algae.The results showed that the best removal efficiency could be achieved when the optimal retention time was 1 h and the air-water ratio was 1.2:1.When the reactor treated high concentration chl-a of 70 mg/m3 containing raw water under optimal conditions,average removal rates of chl-a,CODMn and NH4+-N were 65.48%,47.81% and 70.54%,respectively,and the CODMn and NH4+-N concentration in effluent achieved established target of Dongshen Water Supply Engineering.The process had good effect on treating high concentration chl-a containing raw water under optimal conditions and the advantage of stable quality of output water as well as good technological adaptability.