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Main Title An index of refractory organics /
Author Helfgott, T. B., ; Hart, F. L. ; Bedard., R. G.
Other Authors
Author Title of a Work
Hart, F. L.,
Bedard, R. G.,
CORP Author Connecticut Univ., Storrs. Environmental Engineering Program.;Robert S. Kerr Environmental Research Lab., Ada, Okla. Source Management Branch.
Publisher Environmental Protection Agency, Industrial Section, Source Management Branch, Office of Research and Development, Robert S. Kerr Environmental Research Laboratory ; for sale by the National Technical Information Service,
Year Published 1977
Report Number EPA-600/2-77-174; EPA-R-803231-01-05
Stock Number PB-272 438
OCLC Number 03385122
ISBN pbk.
Subjects Organic wastes ; Refractory materials--Analysis
Additional Subjects Refractory materials ; Organic compounds ; Refractivity ; Water pollution ; Biochemical oxygen demand ; Industrial wastes ; Sewage treatment ; Water analysis ; Chemical analysis ; Materials recovery ; Numerical analysis ; Graphic methods ; Water pollution detection ; Biological industrial waste treatment
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600-2-77-174 c.1 Headquarters Library/Washington,DC 02/27/2014
ELBD ARCHIVE EPA 600-2-77-174 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD  EPA 600-2-77-174 AWBERC Library/Cincinnati,OH 04/10/1998
EMBD  EPA/600/2-77/174 NRMRL/GWERD Library/Ada,OK 02/17/1995
ESAD  EPA 600-2-77-174 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-272 438 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation ix, 131 pages : illustrations, figures, tables ; 28 cm.
Refractory waterborne organics resist biodegradation, accumulate in the environment and can inhibit life forms. This research develops laboratory techniques for, and interpretations of, a Refractory Index (R.I.) to quantitatively assess the persistency of refractory organics and uses R.I. to evaluate some 38 industrial, natural and combined organics. R.I. values close to 1.0 characterize readily biodegradation; R.I. values near zero indicate refractory organics; negative R.I. values indicate inhibitors. The coefficient of variation for R.I. values is 13%. Since negative R.I. values are of qualitative significance only, a Biological Inhibition Value (B.I.V.) is developed and used to quantitatively assess those organics found to interfere with the biochemical tests used, long-term ultimate Warburg Respirometer determinations. In a few cases, confirmation of the R.I. interpretation was performed using a model activated sludge unit and by specific analysis. Correlations between oxygen demand tests (BOD5, BODu, TOD) and organic parameters (TOC, TN) are presented. Suggestions for required pretreatments of industrial wastewaters before allowing discharge into municipal sewage treatment plants are included as an application of the Refractory Index criterion. The bibliography contains 49 references.
"Prepared by Environmental Engineering Program, Civil Engineering Department, University of Connecticut, Storrs, Connecticut under Grant No. R803231-01-05." "Includes appendix." "August 1977." Includes bibliographical references (pages 40-44).