Bio-STARTM NitroBac is a liquid blend of nitrifying bacteria of the strains Nitrosomonas and Nitrobacter. This product was specifically developed for aerobic wastewater treatment systems and allows a rapid and successful establishment of nitrification in aerated lagoons and activated sludge processes for municipal and industrial wastewater, landfills, steel plants, refineries, refineries, food processors/renderers, and chemical producers. The success of this bioaugmentation normally requires a review of solids retention time, dissolved oxygen, pH, alkalinity, effluent BOD, and the potential impact of inhibitory substances. When nitrification is inhibited by a too high BOD or by inhibitory substances, it is recommended to set up a program to reduce the organic load under inhibitory levels prior to Bio-STAR NitroBac addition.


  1. Rapid recovery from nitrification upsets caused by organic or inhibitory shocks, hydraulic overloads, or sudden solids loss.
  2. Improve nitrification efficiencies or solidly establish nitrification in chronically underperforming systems
  3. Extend the nitrification period in a cold climate.
  4. Provide a nitrifying seed for seasonal start-ups.
  5. Reduce chlorine consumption caused by nitrite buildup.
  6. Minimize the impact of under-designed systems on nitrification.
  7. Retrofit equipment for use as biological ammonium polishing units in low BOD streams


Bacterial type Nitrosomonas and Nitrobacter consortium
Biological pathway strict aerobic
Pathogenic bacteria Salmonella/Shigella free
pH range 6.5 – 8.5
Effective temperature range 8º – 44º C
Appearance Turbid liquid
Shelf life 4-8 months refrigerated