| Achoimre: | Alcaligenes spp. was found to have the ability to grow and remove ammonium in the medium through the nitrification denitrification process. This ability was also known as an ammonium treatment in organic wastewater including livestock’s wastewater. In order to further understand its potential to remove ammonium in livestock’s wastewater; microbial growth, ammonium, nitrite, and nitrate production of Alcaligenes sp. LS2T were investigated in phosphate medium at different carbon/nitrogen ratios (C/N ratios) along with constant airflow. Ammonium sulfate was used as sole nitrogen source with acetate and citrate as an organic carbon source in a separate medium. Results showed that Alcaligenes sp. LS2T could utilize ammonium as sole nitrogen source which associated with acetate and citrate as carbon source at different C/N ratios,
resulting in ammonium removal, production of nitrite and nitrate at various concentrations in the medium. Highest
ammonium removal was found in the acetate C/N 28 medium where 94.44% of initial ammonium was removed.
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