SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2015, Vol. 23 ›› Issue (1): 303-308.DOI: 10.1016/j.cjche.2014.09.036

• ENERGY, RESOURCES AND ENVIRONMENTAL TECHNOLOGY • Previous Articles     Next Articles

Simultaneous removal of nitrogen and phosphorus from swine wastewater in a sequencing batch biofilm reactor

Reti Hai, Yiqun He, Xiaohui Wang, Yuan Li   

  1. Center of Environmental Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2013-04-19 Revised:2014-01-12 Online:2015-01-24 Published:2015-01-28
  • Contact: Yiqun He
  • Supported by:

    Supported by the Beijing Municipal Science and Technology Program (Z12110000 1512008).

Simultaneous removal of nitrogen and phosphorus from swine wastewater in a sequencing batch biofilm reactor

Reti Hai, Yiqun He, Xiaohui Wang, Yuan Li   

  1. Center of Environmental Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
  • 通讯作者: Yiqun He
  • 基金资助:

    Supported by the Beijing Municipal Science and Technology Program (Z12110000 1512008).

Abstract: In this study, the performance of a sequencing batch biofilm reactor (SBBR) for removal of nitrogen and phosphorus from swine wastewater was evaluated. The replacement rate of wastewater was set at 12.5% throughout the experiment. The anaerobic and aerobic times were 3 h and 7 h, respectively, and the dissolved oxygen concentration of the aerobic phase was about 3.95 mg·L-1. The SBBR process demonstrated good performance in treating swine wastewater. The percentage removal of total chemical oxygen demand (COD), ammonia nitrogen (NH4+-N), total nitrogen (TN), and total phosphorus (TP) was 98.2%, 95.7%, 95.6%, and 96.2% at effluent concentrations of COD 85.6mg·L-1,NH4+-N 35.22mg·L-1, TN44.64 mg·L-1, and TP 1.13mg·L-1, respectively. Simultaneous nitrification and denitrification phenomenon was observed. Further improvement in removal efficiency of NH4+-N and TN occurred at COD/TN ratio of 11:1, with effluent concentrations at NH4+-N 18.5 mg·L-1 and TN 34 mg·L-1, while no such improvement in COD and TP removal was found. Microbial electron microscopy analysis showed that the filler surfacewas coveredwith a thick biofilm, forming an anaerobic-aerobicmicroenvironment and facilitating the removal of nitrogen, phosphorus and organicmatters. A long-termexperiment (15 weeks) showed that stable removal efficiency for N and P could be achieved in the SBBR system.

Key words: Sequencing batch biofilm reactor, Swine wastewater, Simultaneous nitrogen and phosphorus, removal

摘要: In this study, the performance of a sequencing batch biofilm reactor (SBBR) for removal of nitrogen and phosphorus from swine wastewater was evaluated. The replacement rate of wastewater was set at 12.5% throughout the experiment. The anaerobic and aerobic times were 3 h and 7 h, respectively, and the dissolved oxygen concentration of the aerobic phase was about 3.95 mg·L-1. The SBBR process demonstrated good performance in treating swine wastewater. The percentage removal of total chemical oxygen demand (COD), ammonia nitrogen (NH4+-N), total nitrogen (TN), and total phosphorus (TP) was 98.2%, 95.7%, 95.6%, and 96.2% at effluent concentrations of COD 85.6mg·L-1,NH4+-N 35.22mg·L-1, TN44.64 mg·L-1, and TP 1.13mg·L-1, respectively. Simultaneous nitrification and denitrification phenomenon was observed. Further improvement in removal efficiency of NH4+-N and TN occurred at COD/TN ratio of 11:1, with effluent concentrations at NH4+-N 18.5 mg·L-1 and TN 34 mg·L-1, while no such improvement in COD and TP removal was found. Microbial electron microscopy analysis showed that the filler surfacewas coveredwith a thick biofilm, forming an anaerobic-aerobicmicroenvironment and facilitating the removal of nitrogen, phosphorus and organicmatters. A long-termexperiment (15 weeks) showed that stable removal efficiency for N and P could be achieved in the SBBR system.

关键词: Sequencing batch biofilm reactor, Swine wastewater, Simultaneous nitrogen and phosphorus, removal