System for improved biological nutrient removal

Details System for improved biological nutrient removal System for improved biological nutrient removal

2005-04-19

2005-04-19

Lauchman, Layla (Department: 2877)

Optics: measuring and testing

By dispersed light spectroscopy

With raman type light scattering

C436S110000

Reexamination Certificate

active

06882419

ABSTRACT:
A method is provided for the determination of NO2−and/or NO3−in water by subjecting the water sample to ultraviolet resonance Raman spectroscopy within the range of wavelengths of 200-240 nm, and determining the presence of NO2−and/or NO3−based on the Raman spectral measurement. The method has particularly applicability to the determination of such ions in wastewater, such as in activated sludge washwater treatment reactors. The method may also be employed with advantage in the control of processes involving the removal of ammonium ions upon reaction with oxygen.

REFERENCES:
patent: 6040906 (2000-03-01), Harhay
patent: 6051436 (2000-04-01), Reagen et al.
Xi et al, Determination of low concentrations of the azo-dye complex of nitrite in fresh water and seawater using surface-enhanced resonance Raman spectroscopy (SERRS), 1992, Applied Spectroscopy, v 46(5), pp 819-826.

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