Alcaligenes ammonioxydans

Classification

Higher order taxa

• Domain: Bacteria
  • Phylum: Proteobacteria
    • Class: Beta Proteobacteria
      • Order: Burkholderiales
        • Family: Alcaligenaceae

Species

Species

• Genus: Alcaligenes

• Species: ammonioxydans

Alcaligenes ammonioxydans sp. nov. strain HO-1

Description and significance

The Genus Alcaligenes is composed of Gram negative, typically aerobic species that have a wide range of metabolic capabilities, which included heterotrophic nitrification-aerobic denitrification (Hendrie et al. 1974; Wu et al. 2021). Alcaligenes ammonioxydans sp. nov. HO-1 was first isolated from the active sludge of a SHARON bioreactor of a combined system which was used to treat wastewater from pig husbandry (Wu et al. 2021) Strain HO-1 was isolated for its heterotrophic ammonia oxidation capabilities, and a novel metabolic pathway which involves the oxidation of ammonia to dinitrogen gas through hydroxylamine as an intermediate was found. This species is capable of high amounts of ammonia removal, and without optimization was capable of removing 195.59 mg/L NH4 per day on 28mM NH4.. A. ammonioxydans grew aerobically and achieved ammonia removal on a range of carbon substrates which include acetate, ethanol, propionate, malate, succinate, and citrate and on C/N ratios ranging from 2-20. Optimal pH is 7 but growth is observed at range from 6-10, and optimal temperature is 30°C with growth seen at 23-37°C (Wu et al. 2021)