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WRRCTR No.137 Contact Chamber Aeration Effects on Effluent Disinfection

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Title: WRRCTR No.137 Contact Chamber Aeration Effects on Effluent Disinfection
Authors: Iwamoto, Stanford M.
Chun, Michael J.
Young, Reginald H.F.
Dugan, Gordon L.
Keywords: chlorination
sewage treatment
show 6 moremixing
chlorine contact chamber
chlorine dosages
Mililani WWTP

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LC Subject Headings: Sewage -- Purification -- Aeration.
Sewage -- Purification -- Chlorination.
Issue Date: Mar 1981
Publisher: Water Resources Research Center, University of Hawaii at Manoa
Citation: Iwamoto SM, Chun MJ, Young RHF, Dugan GL. 1981. Contact chamber aeration effects on effluent disinfection. Honolulu (HI): Water Resources Research Center, University of Hawaii at Manoa. WRRC technical report, 137.
Series/Report no.: WRRC Technical Report
Abstract: The most cornmon method of disinfecting waste water effluent is by chlorination
which destroys pathogenic microorganisms in the waste water stream.
A field study conducted at the Wahiawa Wastewater Treatment Plant on the
island of Oahu, Hawaii was established to determine the effect of aeration on disinfection efficiency in the chlorine contact chamber. A range of chlorine dosages was applied to the waste water entering the contact chamber for aeration rates of 0, 2.36 x 10^(-3) , and 4.72 x 10^(-3) std. m^3/s (0, 5, and 10 std. cfm) of air. The chlorine demand and chlorine requirement of the waste water was then determined by measuring the chlorine residual and fecal
coliform concentration in the effluent leaving the chlorine contact chamber.
The addition of aeration into the chlorine contact chamber enhanced the disinfection efficiency of chlorine, while its effect on chlorine residual loss in the contact chamber was not readily apparent; however, a greater drop in the chlorine residual was observed for higher chlorine dosages during periods of aeration, in comparison to nonaerated conditions.
Sponsor: Office of Water Research and Technology, U.S. Dept. of the Interior Grant/Contract No. 14-34-0001-9013, -0113 (A-076-HI)
Pages/Duration: viii + 40 pages
Appears in Collections:WRRC Technical Reports

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