Simultaneous nitritation and denitritation system
AssigneeNexom
InventorsTanner Devlin, Merle Kroeker, Martin Hildebrand
Life of this patent
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Abstract
The reduction of only the soluble fraction of organic matter prior to SND systems enhances nitrification rates while still providing residual particulate and colloidal organic matter to sustain denitrification in SND systems. Surprisingly, by increasing the amount of soluble organic matter reduced by conversion to biomass or microbial product and decreasing the amount of soluble organic matter reduced by oxidation to carbon dioxide prior to SND zones will still enhance nitrification rates while providing even more particulate and colloidal organic matter to improve denitrification in the SND zones.
Claims12
A method for simultaneous nitritation and denitritation system comprising:
- providing a simultaneous nitritation and denitritation system comprising:
- a first attached growth zone configured to receive a quantity of influent;
- and
- a second attached growth zone downstream of the first attached growth zone and configured to receive a quantity of treated influent from the first attached growth zone;
- said first attached growth zone receiving a quantity of influent and reducing soluble organic matter within the quantity of influent by converting the soluble organic matter to biomass or microbial product, thereby providing a treated influent wherein at least 50% of the organic matter by weight is particulate, colloidal, or microbial product organic matter;
- and
- said second attached growth zone simultaneously reducing the ammonia and nitrate/nitrite content under aerobic or anoxic conditions by performing simultaneous nitrification and denitrification or simultaneous nitritation and denitritiation on the quantity of treated influent and releasing a treated effluent, wherein the aerobic and anoxic conditions alternate at a controlled interval.
A system for simultaneous nitritation and denitritation comprising:
- a first attached growth zone configured to receive a quantity of influent and reduce soluble organic matter within the quantity of influent by converting the soluble organic matter to biomass or microbial product for providing a treated influent wherein at least 50% of the organic matter by weight is particulate, colloidal or microbial product organic matter, and
- a second attached growth zone downstream of the first attached growth zone and configured to receive a quantity of treated influent from the first attached growth zone and simultaneously reduce the ammonia and nitrate/nitrite content under aerobic or anoxic conditions by performing simultaneous nitrification and denitrification or simultaneous nitritation and denitritiation on the quantity of treated influent and releasing a treated effluent, wherein the aerobic and anoxic conditions alternate at a controlled interval.
Dependencies are inferred from the claim text.