Removal of nitrogenous substances by Aspergillus niger in a continuous stirred tank reactor (CSTR) system

In this investigation, A. niger NBG5 was employed in a continuously stirred tank reactor (CSTR) system to remove nitrogen. A total ammonia nitrogen (TAN) of 25 mg L−1 was removed within 35 h from artificial wastewater. TAN and nitrite-N concentrations were decreased to 0.35 and 0.12 mg L−1, respectively, passing CSTR at a hydraulic retention time (HRT) of 3.3 h.