Nitrogen removal system and process

A method of treating wastewater, the method comprising steps of:

• subjecting the wastewater to an activated sludge-based biological treatment in a basin wherein nitrogen is removed from the wastewater;
• producing an N2O detection in the biological treatment via an N2O sensor;
• and
• dosing organic carbon from an organic carbon source to the biological treatment based on the N2O detection thereby controlling an N2O level of the biological treatment via the organic carbon.

A method of treating wastewater, the method comprising steps of:

• subjecting the wastewater to an activated sludge-based biological treatment in a basin wherein nitrogen is removed from the wastewater, including:
• forming an anaerobic region and an anoxic region in the biological treatment;
• and
• utilizing continuous flow, cyclic aeration,
• producing an N2O detection in at least one of the anaerobic region and the anoxic region;
• and
• dosing organic carbon from an organic carbon source into the anoxic region of the biological treatment based on the N2O detection thereby controlling an N2O level of the biological treatment via the organic carbon,
• wherein the organic carbon is from at least one of a primary sludge fermentation system, a biomass fermentation system, and an external organic carbon feed product including at least one of glycerol, methanol, and acetate, and
• wherein the subjecting step utilizes at least one of nitrification (ammonium oxidation to nitrate), partial nitritation (ammonium oxidation to nitrite), denitrification with nitrite (nitrite reduction to nitrogen gas), partial denitritation (nitrate reduction to nitrite), denitrification (nitrate reduction to nitrogen gas), and anaerobic ammonium oxidation (Anammox).