Denitrification process

Details Denitrification process Denitrification process

2006-08-15

2008-10-07

Barry, Chester T. (Department: 1797)

Liquid purification or separation

Processes

Treatment by living organism

C210S746000, C210S739000, C210S143000

Reexamination Certificate

active

07431840

ABSTRACT:
A process and system for denitrification of wastewater. The process includes the steps of measuring an influent flow rate, measuring influent concentrations of nitrates, nitrites, and dissolved oxygen in the wastewater, and using the influent concentrations to determine a nominal amount of methanol to be provided for denitrification. The invention also contemplates the measurement of effluent concentrations of nitrates and nitrites (i.e., NOx), and optionally using the effluent concentrations to adjust the nominal amount of methanol being provided.

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patent: 2007/0144966 (2007-06-01), Janssen et al.
Freed et al., “Enhanced Nutrient Removal Using a Continuous Backwash Filter for Secondary Effluent Denitrification,” USFilter Davco Products, no date available.
Hultman et al., “Combined Nitrogen and Phosphorus Removal in a Full-Scale Continuous Up-Flow Sand Filter,”Water Science&Technology, 1994, pp. 127-134, vol. 29, No. 10-11, Great Britain.
Lindberg et al., “Adaptive Control of External Carbon Flow Rate in an Activated Sludge Process,”Water Science&Technology, 1996, pp. 173-180, vol. 34, No. 3-4, Great Britain.

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