Microbial Assessment of the Lanai Auxiliary Reclamation Facility to Produce Wastewater Effluent for Unrestricted, Non-Potable Reuse
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1998-10
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Water Resources Research Center, University of Hawaii at Manoa
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An Auxiliary Reclamation Facility (ARF) was constructed to receive stabilization pond treated sewage and further treated it with water hyacinth pond, chemical flocculation, filtration and ultraviolet light disinfection. This was the first facility in Hawaii, which was approved to produce the highest quality reclaimed water using alternative treatment schemes. We assessed the effectiveness of the ARF by monitoring water samples after each of the ARF treatment schemes for five genetically different groups of sewage borne microorganisms (fecal coliform, enterococci, C. perfringens, FRNA phage, total heterotrophic bacteria). The concentrations of all fecal indicator microorganisms, especially FRNA phage were low in the influent water to the ARF indicating that extended pond treatment may be especially effective in removing human viruses from sewage. The ARF treatment scheme was calculated to be able to reduce >99.99% of fecal coliform and therefore was able to produce an effluent meeting the non-potable, unrestricted reuse standard of a geometric mean of <1 fecal coliform/ 100ml.
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Fujioka RS, Bonilla AJ, Rijal GK. 1998. Microbial assessment of the lanai auxiliary reclamation facility to produce wastewater effluent for unrestricted, non-potable reuse. Honolulu (HI): Water Resources Research Center, University of Hawaii at Manoa. WRRC 98-06.
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27 pages
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