||Removal of Impurities from Trickling Filter Effluents by Coagulation.
Keinat, Thomas M. ;
||Clemson Univ., S.C. Water Resources Research Inst.
||WRRI-31; DI-14-01-0001-1861 ;DI-14-31-0001-3041; OWRR-A-012-SC; 13826,; A-012-SC(6)
( Sewage treatment ;
( Trickling filtration ;
( Industrial waste treatment ;
Iron inorganic compounds ;
Aluminum inorganic compounds ;
pH control ;
Cost estimates ;
Performance evaluation ;
Suspended sediments ;
Chemical removal(Sewage treatment) ;
Pilot plants ;
Zeta potential ;
Biological industrial waste treatment ;
Secondary sewage treatment
||Some EPA libraries have a fiche copy filed under the call number shown.
||The results of the investigation demonstrated that chemical coagulation with salts of Fe(III) and Al(III) can complement and can substantially enhance the treatment efficiencies of existing wastewater treatment facilities. Effective removals of the hydrophilic organic colloids present in trickling filter effluents were achieved with the Fe(III) coagulant. Both laboratory and pilot-plant scale studies showed that consistent removals of COD of 70 to 90 percent could be obtained, despite variations in waste strength and composition. Bacterial cells were destabilized and removed from solution concurrent with coagulation of other colloidal matter. Approximately 89 percent of the viable bacteria initially present were removed at the optimum coagulant dose in the pilot studies. The continuous-flow studies showed removals of total nitrogen and total phosphate of 16 and 85 percent, respectively. Projected chemical costs are given.
||Also sponsored by contract DI-14-31-0001-3241.
||Demonstrates that chemical coagulation with salts of Fe and Al can complement and enhance treatment efficiencies.
|NTIS Title Notes
||Completion rept. Jul 68-Jun 71.
|PUB Date Free Form
||PC A04/MF A01