Water filtration apparatus having upflow buoyant media filter and downflow nonbuoyant media filter

摘要: A water filtration system is provided by an upflow filter vessel containing a buoyant media in series with downstream downflow nonbuoyant media. The and comprise two compartments of common tank, separated central wall. Water from the passes over top this wall, or through one more openings to vessel. waste trough extends end tank other. Weir plates are fastened upper edges such that steps upwardly elevation at Waste materials pass lower these weir into during cleaning filter. In contrast, flow latter An adjustment mechanism, as adjustable plates, for adjusting size wall minimize passage opening bed. addition, gate may be selectively closing further material