||Particle Removal and Head Loss Development in Biological Filters.
Goldgrabe, J. C. ;
Summers, R. S. ;
Miltner., R. J. ;
||Cincinnati Univ., OH. Dept. of Civil and Environmental Engineering. ;Corollo (John) Engineers, Walnut Creek, CA.;Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.
Water treatment ;
Head losses ;
Fluid flow ;
Water quality ;
Biological filters ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
Both prechlorinated and biological filters achieved more than one-log removal of turbidity. Effluent turbidities for the biological filters normally did not exceed 0.15 ntu and clearly did not exceed the filtered-water turbidity performance requirement of 0.5 ntu. Turbidity measurements did not indicate major performance differences between PC, BWC, and NC filters. Thus, based on turbidity measurements, biological filtration was not considered to degrade filtered-water quality.