|MARTINEZ, JOSE - Cemagref(CENTRE FOR AGRICULTURAL AND ENVIRONMENTAL ENGINEERING RESEARCH)|
|KUNZ, AIRTON - Embrapa|
|FUJII, TAKAO - Sojo University|
Submitted to: Meeting Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 3/18/2013
Publication Date: 6/3/2013
Citation: Vanotti, M.B., Martinez, J., Kunz, A., Fujii, T. 2013. New concepts of ammonia removal from digested swine effluents using anammox based deammonification process. Proceedings of the 15th International Conference of the Network on Recycling of Agricultural, Municipal and Industrial Residues in Agriculture, RAMIRAN 2013, June 3-5, 2013, Versailles, France. 4p.
Technical Abstract: Production of biogas from swine manure using anaerobic digesters (AD) is projected to be important in the future. However, surplus nitrogen (N) in AD effluents is difficult to remove using current technology (nitrification/denitrification) because low carbon availability after biogas production. We investigated a deammonification process for the removal of ammonia from AD effluents. This process is autotrophic and removes N without carbon. Instant deammonification reaction was obtained by mixing a high performance nitrifying sludge (HPNS) (NRRL B-50298) with anammox sludge Brocadia caroliniensis (NRRL B-50286), in single, aerated reactors containing fluidized plastic carriers. The process was tested at ambient temperature (23±2oC) using AD swine effluents. Ammonia was removed at rates of 0.7-1.0 kilograms N/ cubic meter reactor/day and efficiencies obtained were 88-100%. The chemical reaction was consistent with the theory of deammonification. Compared with traditional N removal, the deammonification process reduced 56-57% of the aeration needs. Microbial reverse transcription analyses indicated that bacteria in the influent had little effect on the bacterial community that was active in the single-tank. Results showed physiologically high activity of ammonia oxidizing bacteria (AOB) and anammox bacteria in the reactor.