||Fine solids removal following combined chemical-trickling filter treatment /
Brown, James Clement,
||North Carolina Univ. at Chapel Hill. Dept. of Environmental Sciences and Engineering.;Municipal Environmental Research Lab., Cincinnati, OH.
|| Municipal Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Trickling filters. ;
Trickling filtration ;
Chemical removal(Sewage treatment) ;
Sewage treatment ;
Aluminum sulfate ;
Performance evaluation ;
Pilot plants ;
Water quality ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||36 pages : illustrations ; 28 cm.
This research project was designed to evaluate the effectiveness of settling ponds and several types of granular media filters for removing residual fine solids from the effluent of a conventional, high-rate, rock media trickling filter plant when alum is applied ahead of secondary clarification. Two pilot settling ponds, one covered and one open, were operated at detention times ranging from 8 to 30 hr. Two pilot granular media filters were operated at filtration rates ranging from 1.0 to 2.0 1/sec/sq m (1.5 to 3.0 gpm/sq ft). The filters were operated in both downflow and upflow modes, with various media used in each operational mode. Very modest improvement in final effluent quality, generally less than 25 percent, was observed.
"UNC Wastewater Research Center, Department of Environmental Sciences and Engineering, University of North Carolina at Chapel Hill." "Wastewater Research Division, Municipal Environmental Research Laboratory." "July 1980." Includes bibliographical references (page 25). "Contract no. 68-03-0225." Microfiche.