Abstract: Aiming at the technical problems of low nitrogen removal efficiency and high operating costs of traditional nitrogen removal treatment processes for the livestock wastewater from large-scale livestock and poultry farms, this paper proposes partial nitrification-Anammox denitrification process for the livestock wastewater, and a demonstration project study was conducted. The research results of the demonstration project indicate that partial nitrification-Anammox process can operate stably in the treatment of the livestock wastewater, the average mass concentrations of ammonia nitrogen $ (\mathrm{NH}_{4}^{+}-\mathrm{N}) $, chemical oxygen demand (COD), suspended solids (SS), and total nitrogen (TN) in the process effluent are 34, 58, 190, and 127 mg/L, respectively, and the average removal rates are 82.5%, 81.7%, 91.6%, and 58.3%, respectively, the effluent quality meets the requirements of the Discharge Standard of Pollutants for Livestock and Poultry Breeding (GB 18596—2001). The total cost of wastewater treatment in this process is 2.83 yuan/m $ ^{3} $, which saves 30.0%-91.8% compared to other biological treatment processes. This indicates that partial nitrification-Anammox process for treating the livestock wastewater from dairy farms has good feasibility and application value.
Keywords: livestock wastewater; partial nitrification; Anammox; nitrogen removal
合肥工业大学学报自科版