Methods and compositions for nitrogen removal using Feammox microorganisms
Processes and compositions for removal nitrogen, organic and inorganic contaminants from wastewater using Feammox bacterium are provided.
1. A composition comprising: an Acidimicrobiaceae Feammox bacterium A6 having Accession Deposit Number PTA-122488, a carrier and wastewater, wherein the bacterium is capable of oxidizing ammonium coupled with reduction of Fe(III) to Fe(II), the carrier comprises a medium for culturing the bacterium, and the wastewater comprises an ammonium containing contaminant and at least one more contaminant selected from the group consisting of: halogenated organic contaminants, chlorinated volatile organic compounds, perchloroethylene (PCE), trichloroethylene (TCE), trichloroethane, dichloroethane, vinyl chloride, polychlorinated biphenyls, fuel constituents, benzene, ethylbenzene, toluene, xylene, phenanthrene, methyl tert butyl ether, tertiary butyl alcohol, polyaromatic hydrocarbons, and ethylene dibromide.
2. The composition of claim 1 further comprising a source of ferric iron.
3. The composition of claim 2 , wherein the source is selected from the group consisting of: a ferrihydrite, a goethite, a scrap iron, a nontronite, and an iron-rich clay.
4. The composition of claim 1 , wherein the medium comprises ammonium and iron oxide and has an acidic pH.
5. The composition of claim 4 further comprising CO 2 .
6. The composition of claim 1 further comprising CO 2 .
7. The composition of claim 1 comprising at least 10 4 bacterial cells per milliliter of the composition.
8. The composition of claim 7 comprising the bacterium in the concentration in a range from 10 4 to 10 10 bacterial cells per milliliter of the composition.