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Multilevel contact oxidation treatment of brewery wastewater using spiral biological carriers and their nitrogen removal mechanism

Author

Listed:
  • Tianlong Zheng
  • Peng Li
  • Chuanfu Wu
  • Qunhui Wang
  • Xuesong Li
  • Hengyu Ai
  • Ariunbileg Sharavsambuu

Abstract

In this study, spiral biological carriers were used to treat brewery wastewater in a multilevel contact oxidation process. The optimal operational conditions are the following: hydraulic retention time of 6.5 h; temperature of above 21°C; pH of 7.2; and dissolved oxygen concentration ranges of 4.0-6.0 mg/L, 3.0-4.0 mg/L, 2.0-3.0 mg/L, and 2.0-3.0 mg/L in four contact oxidation tanks, respectively. Under the optimal conditions, the removal efficiencies of total nitrogen, ammonia, and CODcr of the system were 77.0%, 87.6%, and 92.2% respectively. Effluent quality met the discharge standard of pollutants for the beer industry (GB 19821-2005). In addition, the aerobic-anoxic micro-and macro-environments were formed in the spiral biological carriers. This could be explained by the specific surface character and three-dimensional spiral structure of these carriers which strengthened the simultaneous nitrification and denitrification (SND) process. The removal efficiency of total nitrogen of the reactor was up to 82.4%.

Suggested Citation

  • Tianlong Zheng & Peng Li & Chuanfu Wu & Qunhui Wang & Xuesong Li & Hengyu Ai & Ariunbileg Sharavsambuu, 2015. "Multilevel contact oxidation treatment of brewery wastewater using spiral biological carriers and their nitrogen removal mechanism," International Journal of Environmental Technology and Management, Inderscience Enterprises Ltd, vol. 18(1), pages 30-43.
    • Handle: RePEc:ids:ijetma:v:18:y:2015:i:1:p:30-43
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