基于高效絮凝沉淀池与翻板滤池组合工艺的工程案例

Engineering case based on the combination process of high-efficiency flocculation sedimentation tank and shutter filter

以银川市某水厂为例,评估高效絮凝沉淀池与翻板滤池组合工艺的工程应用效果。结果表明,高效絮凝沉淀池与翻板滤池组合工艺能够适应较大水质波动,具有一定抗冲击负荷能力。其浊度去除率和高锰酸盐指数(以COD^(Mn)计)去除率较高,出水水质满足《生活饮用水卫生标准》(GB/T5749-2006)。通过调整排泥量和污泥回流比,能够有效解决沉淀池泥位超标问题。根据翻板滤池的过滤负荷和滤水阀门的开度调整反冲洗周期,能够提高过滤效率,节约电耗。少量无烟煤滤料的流失对翻板滤池出水浊度无影响。本研究结果可为低温低浊水处理工程提供设计经验和工程案例参考。

Taking the Great Wall Water Treatment Plant in Yinchuan city,Ningxia as an example,the application effect of high efficiency flocculation sedimentation tank combined with shutter filter was evaluated.The results showed that the combined process could adapt to a large fluctuation of influent quality and had a strong anti-shock loading capability.The removal rates of turbidity and permanganate index(COD^(Mn))were high.The effluent quality could meet standards for drinking water quality(GB5749-2006).Adjusting the sludge mass and sludge reflux ratio had been proved to be an effective solution to sludge level excessive in the sedimentation tank.It can be adjusted to the backwash cycle according to filtration load of the shutter filter and opening aperture of the filtered water valve,which made the filtration efficiency improve significantly and power consumption reduce.A small anthracite loss had little effect on effluent turbidity of the shutter filter.