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- Title
Treatment Efficiency and Stoichiometry of a High-Strength Graywater.
- Authors
Morse, Audra; Khatri, Sukrut; Jackson, W. Andrew
- Abstract
The transit mission wastewater may represent a future graywater, in which toilet waste is separated from other household waste streams, and dilution water is minimal. A loading rate study indicated that denitrification is stoichiometrically limited, and nitrification was kinetically limited. Denitrification stoichiometry was developed by deriving hypothetical molecular formulas of organic carbon inputs to be represented by the relative proportions of carbon, hydrogen, oxygen, and nitrogen. The derived stoichiometry was validated against experimental data by adjusting the values of fe and fs and multiplying the total dissolved organic carbon loss across the system by the overall R equation and then comparing the total nitrogen removed in the reaction to experimentally observed total nitrogen removal. The nitrification stoichiometry was similarly validated by multiplying the R equation by the ammonium-nitrogen removed and then comparing the NOx-N formed in the equation to actual NOx-N production values. The fs values for the denitrifying and nitrifying bacteria were 0.33 and 0.15, respectively.
- Subjects
GRAYWATER (Domestic wastewater); DENITRIFICATION; STOICHIOMETRY; NITRIFICATION; WATER waste; WASTEWATER treatment
- Publication
Water Environment Research (10614303), 2007, Vol 79, Issue 13, p2557
- ISSN
1061-4303
- Publication type
Article
- DOI
10.2175/106143007X184555