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PERFORMANCE OF ACTIVATED SLUDGE-POWDERED ACTIVATED CARBON-WET AIR REGENERATION SYSTEMS
Citation:
Deeny, K., J. Heidman, AND A. Condren. PERFORMANCE OF ACTIVATED SLUDGE-POWDERED ACTIVATED CARBON-WET AIR REGENERATION SYSTEMS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-90/012 (NTIS PB90188889), 1990.
Description:
The investigation summarized in this report was undertaken to evaluate the performance of powdered activated carbon (PAC) technology used in conjuntion with wet air regeneration (WAR) at municipal wastewater treatment plants. xcessive ash concentrations accumulated in the mixed liquor suspended solids (MLSS) at all facilities that relied on the WAR unit blowdown for ash control. ariety of ash control methods have been implemented and are documented. he nitric acid test for PAC was shown to substantially overestimate PAC concentrations. AC losses across WAR or the desirability and economics of recovering the volatile suspended solids (VSS) exiting the WAR reactor could not be quantified. ther areas covered in the report include adsorptive capacity of the recycled material, tertiary filter performance, metals accumulation, oxygen transfer, operation and maintenance concerns and economic considerations. he report includes Appendices submitted by the system manufacturer that dispute many of the report conclusions and provide alternative explanations for some of the data obtained.
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PERFORMANCE OF ACTIVATED SLUDGE-POWDERED ACTIVATED CARBON-WET AIR REGENERATION SYSTEMS