The removal of inorganic nitrogen compounds from industrial, municipal and non-point source effluents is becoming an important area of pollution control. Nitrogen compounds serve as nutrients in receiving water bodies for the growth of microorganisms which can reduce available oxygen in these environments.

      PBS has developed high rate, low cost Bio-denitrification systems for application in all three areas of interest.  De-nitrification is defined as the reduction of Nitrate-nitrogen (NO3) and Nitrite-nitrogen (NO2)  to gaseous nitrogen (N2), which comprises 78% of the earth’s air. The microorganisms involved are common in the environment and are referred to as facultative microbes that utilize the oxygen in Nitrate for growth in the absence of air. Hence these are called anoxic reactions.

      PBS uses the natural propensity of microbes to immobilize on solid media to create high microbial density reactors. Activated Carbon is utilized as the immobilization medium in these systems as it possesses very high surface area and has the tendency to accumulate organic compounds.  Expanded beds of Biologically Activated Carbon reach extremely high Nitrate removal rates in PBS reactors, resulting in small footprint, simple systems.

PBS has found that denitrifying Bio-reactors are also very effective at removing many complex organic molecules and we have applied these systems for the removal of recalcitrant organic chemicals.

PBS denitrifying systems are modular and similar to the Bio Methantor systems.

Pilot Lab Denitrifying Reactor