11 water and waste treatment equipment for use in clarification and filtration of and sludge removal from water, waste water and industrial water, namely, granular bed filters, plate clarifiers, dissolved air flotation equipment, flocculation mixers, chemical feeders and mixers, vacuum suction headers, surface sludge and scum skimmers, sludge scrapers, screens for screening waste water, presses for dewatering of sludge, conveyors for transportation of dewatered sludge, waste water mixers, sludge mixers, odor control units, aerators, sludge removers, filter media, all sold as a unit