Record Display for the EPA National Library Catalog


Main Title Pilot-Plant Evaluation of Porous Biomass Supports (Journal Version).
Author Heidman, J. A. ; Brenner, R. C. ; Shah, H. J. ;
CORP Author Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab. ;Smith (J.M.) and Associates, Cincinnati, OH.
Publisher c1988
Year Published 1988
Report Number EPA/600/J-88/184;
Stock Number PB89-120919
Additional Subjects Water pollution control ; Waste water ; Water treatment ; Performance evaluation ; Biochemical oxygen demand ; Cost analysis ; Pilot plants ; Aerobic processes ;
Library Call Number Additional Info Location Last
NTIS  PB89-120919 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 21p
Several porous biomass-support systems are currently available for use in the activated-sludge process. One of these systems, Captor, utilizes polyurethane foam pads to provide biofilm growth sites that transform an aerobic suspended-growth reactor into a fixed-film reactor. In a two-year pilot-plant evaluation, three reactors were operated under various loading conditions, dissolved-oxygen levels, and pad-cleaning frequencies in both series and parallel flow configurations. The system efficiently converted soluble biochemical oxygen demand to new biomass, but the majority of the solids exited in the process effluent rather than via the pad cleaners. Increased pad cleaning provided only marginal improvement. Nitrification was evaluated during series operation. Pad durability was good, but overall system economics were not impressive. There was no evidence of enhanced oxygen transfer efficiencies as previously claimed. (Copyright (c) ASCE 1988.)