Denitrification and phosphorus release under anoxic conditions in an anoxic-anaerobic-aerobic BNR process

被引:5
|
作者
Ko, KB
Park, NY
Oh, YK
Lee, KS
Yu, YS
机构
[1] Yonsei Univ, Sch Civil & Environm Engn, Seoul 120749, South Korea
[2] LG E&C Corp, Construct Technol Inst, Seoul 110030, South Korea
关键词
biological nutrient removal; denitrification; phosphorus release; anoxic-anaerobic-aerobic BNR process; bio-NET process;
D O I
10.1080/09593330309385605
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
An anoxic-anaerobic-aerobic biological nutrient removal process was used in this study. The kinetic aspects of denitrification and phosphorus release under anoxic conditions were investigated by conducting a pilot-scale plant operation under various SRTs (solids retention times), HRTs (hydraulic retention times) and internal recycle ratios. The process was capable of completely denitrifying the NOx--N (the sum of NO2--N and NO3--N) in the nitrified recycle, resulting in an NOx--N concentration of less than 1.0 mg l(-1) N) in the anoxic zones. Denitrification and phosphorus release were accomplished due to abundant organic substrates in the anoxic zone at the head end of the process and achieved approximately equivalent rates with respect to influent SCOD loading in the zone. Phosphorus release continued without any nitrate inhibition due to low NOx-N concentrations of less than 2.0 mg l(-1) N in the anaerobic zone.
引用
收藏
页码:693 / 702
页数:10
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