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

doi:10.1016/j.cjche.2014.09.036

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (1): 303-308.DOI: 10.1016/j.cjche.2014.09.036

• 能源、资源与环境技术 • 上一篇下一篇

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

Reti Hai, Yiqun He, Xiaohui Wang, Yuan Li

Center of Environmental Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China

收稿日期:2013-04-19 修回日期:2014-01-12 出版日期:2015-01-28 发布日期:2015-01-24
通讯作者: Yiqun He
基金资助:
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

Center of Environmental Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China

Received:2013-04-19 Revised:2014-01-12 Online:2015-01-28 Published:2015-01-24
Contact: Yiqun He
Supported by:
Supported by the Beijing Municipal Science and Technology Program (Z12110000 1512008).

摘要/Abstract

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

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

Reti Hai, Yiqun He, Xiaohui Wang, Yuan Li. Simultaneous removal of nitrogen and phosphorus from swine wastewater in a sequencing batch biofilm reactor[J]. Chinese Journal of Chemical Engineering, 2015, 23(1): 303-308.

Reti Hai, Yiqun He, Xiaohui Wang, Yuan Li. Simultaneous removal of nitrogen and phosphorus from swine wastewater in a sequencing batch biofilm reactor[J]. Chin.J.Chem.Eng., 2015, 23(1): 303-308.

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

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

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