Wastewater Treatment

Helping you keep your wastewater treatment operations in regulatory compliance.

The System

The largest number of biological wastewater treatment systems are aerobic digesters, which rely on aeration to support oxygen-consuming bacteria. An aerated lagoon (often called aerobic stabilization basin, or ASB) is usually the most practical incubator and often has a retention time of 30-60 days. The bacteria employed are usually fed supplemental Nitrogen (N) and/or Phosphorus (P) nutrient solutions, unless the process (i.e. papermaking) generates a sufficient residual concentration that carries over into the wastewater treatment operation. The objective is to reduce Biological Oxygen Demand (BOD) to acceptable levels prior to discharge (to the source river, stream, etc).

The Treatment

True North offers Nitrogen-only solutions, Phosphorus-only solutions, and Nitrogen-Phosphorus blends. Assay of the products below adopts fertilizer nomenclature, N-P-K, where N is % Nitrogen (as N), P is % Phosphorus (as P2O5), and K is % Potassium (as K2O). K is not needed in this application, though. All of the following can be used as nutrient for bacteria in wastewater treatment (i.e. ASB’s). The 50% urea can also be used for NOx (nitrogen oxides) emissions control from boilers in pulp mills.

Nitrogen (N) only
Urea ammonium nitrate (UAN), i.e. 32-0-0, 28-0-0
50% urea, 23-0-0 (formaldehyde-free available)
Calcium Nitrate (CN9) 9-0-0 + 11% Ca
Nitrate 49 (49% NO3 solution)
Ammonium nitrate (AN20) 20-0-0

Phosphorus (P) only
Phosphoric acid, i.e. 0-25-0, 0-54-0

Nitrogen/Phosphorus Blends (N/P)
Urea phosphoric, i.e. 20-7-0 [many custom options available here]

For pH Control
80% Acetic Acid

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