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RECORD NUMBER: 134 OF 253

OLS Field Name OLS Field Data
Main Title Mutagenic Activity and Chemical Characterization for the Palo Alto Wastewater Reclamation and Groundwater Injection Facility.
Author McCarty, Perry L. ; Kissel, John ; Everhart, Thomas ; Cooper, Robert C. ; Leong, Carole ;
CORP Author Stanford Univ., CA.;Health Effects Research Lab., Cincinnati, OH.
Year Published 1981
Report Number EPA-R-804431; EPA-600/1-81-029;
Stock Number PB81-179590
Additional Subjects Water reclamation ; Toxicology ; Reclamation ; Chemical compounds ; Mutagens ; Effluents ; Chlorination ; Activity ; Water treatment ; Activated carbon ; Sampling ; Statistical data ; Mutagenesis ; Waste water reuse ; Palo Alto Reclamation plant ; Toxic substances ; Biological effects ; Analytical methods
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB81-179590 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 77p
Abstract
At the Palo Alto Reclamation Plant 0.044 cu m/s (1 mgd) of secondary effluent is reclaimed through a series of wastewater treatment processes. Mutagenic activity was consistently found to be present in the secondary treated municipal wastewater influent to the Reclamation Facility. This activity was not reduced significantly by high lime treatment, air stripping, recarbonation, or ozonation, even though these processes did remove a portion of the overall organic content of the wastewaters and many of the volatile organic compounds. Activated-carbon adsorption was effective in removing mutagenic activity to such a degree that mutagenic activity could not be found in water used for injection or that taken from monitoring wells. Chlorination resulted in an increase in mutagenic activity. A laboratory study demonstrated that this increase in activity would not result if chlorine dioxide rather than chlorine were used for disinfection. Chlorination resulted in the production of a significant concentration of non-purgeable, but otherwise unidentified, chlorinated organic compounds, as well as trihalomethanes. Formation or removal of such compounds did not seem to correlate with changes in mutagenic activity. Air stripping by the fountain-spray system was most effective in removing volatile organic compounds, while activated carbon was responsible for removals obtained for most other organic materials.