Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Removal of humic substances and algae by dissolved air flotation /
Author Edzwald, James K. ; Malley, J. P.
Other Authors
Author Title of a Work
Malley, James P.
CORP Author Massachusetts Univ., Amherst. Dept. of Civil Engineering.;Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.
Publisher National Technical Information Service,
Year Published 1989
Report Number EPA/600/2-89/032
Stock Number PB89-214407
OCLC Number 221168080
Subjects Water--Purification--Organic compounds removal. ; Organic water pollutants. ; Cyanobacterial blooms.
Additional Subjects Water treatment ; Drinking water ; Algae ; Humus ; Water quality ; Water supply ; Performance evaluation ; Particles ; Coagulation ; Color ; Dissolved organic matter ; Carbon ; Halogen organic compounds ; Dissolved air flotation ; Halomethanes ; Pretreatment(Water) ; Polyaluminum chloride ; Alum
Library Call Number Additional Info Location Last
ELBD RPS EPA 600-2-89-032 repository copy AWBERC Library/Cincinnati,OH 10/23/2018
NTIS  PB89-214407 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 07/22/2019
Collation xvii, 183 pages : illustrations ; 28 cm
Dissolved air flotation (DAF) is used in place of conventional gravity settling as a means to separate low density floc particles from water. The following objectives were: (1) to compare DAF to conventional water treatment of coagulation-flocculation followed by gravity settling (CGS) for removals of particles, color, dissolved organic carbon (DOC), trihalomethane (THM) precursors, and total organic halide (TOX) precursors; (2) to examine the effects of raw water quality, water temperature, chemical variables, flocculation period prior to DAF, and DAF design and operating variables on DAF performance; and (3) to evaluate alum and polyaluminum chloride (PAC1) as pretreatment coagulants for DAF. The results of the DAF experiments using synthetic and natural waters showed that good DAF treatment requires good coagulation. The experimental results also showed that flotation without a prior flocculation period is effective. For waters containing humic substances, there was no significant difference in the removal of UV, true color, DOC, and dissolved organic halide precursors (THM and TOX) between DAF and conventional treatment.
Study carried out by University of Massachusetts Dept. of Civil Engineering for Risk Reduction Engineering Laboratory, U.S. Environmental Protection Agency. "EPA/600/2-89/032." "PB89-214407." Includes bibliographical references (pages 160-163).