Denitrification deep bed filte

Overview:

The filter material of the denitrification deep bed sand filter adopts 2~4mm quartz sand medium,the filter bed depth is 1.5m-1.8m,the filter bed has enough water quality protection depth to avoid water quality breakdown,even if there is sludge expansion or abnormal conditions in the fronttreatment process,it will not cause hydraulic breakdown of the flter bed.It caneasily cope with the peak flowrate or the treatment plantsludge swelling and other abnormal conditions.Due to the high solid load and the depth of the bed,the homogeneous quartz sand fiter bed allows solid impurities to penetrate the surface of the filter bed and penetrate into the filter material to reach the depth of the entire filter tank to trapsolids.When the denitrification fiter completely loses the flter head,the filter must be backwashed,backwashing simulates the human hand washing and scrubbing mode,using strong air and water for combined backwashing.The high-strength air causes the fiter bed to slightly expand,so that the filter materials rub each other,causing all the intercepted SS is stripped of the media,and the SS is cleared out of the fiter through backwashing water.The cleaning rate reaches 100%.The backwash mode is adopted,and the backwash water does not exceed 2% of the water volume of the treatment plant.