摘要
借助SBR反应器,通过采用厌氧/好氧/缺氧(AOA)的运行方式来实现同步脱氮除磷。结果表明,在好氧段补充一定量的碳源可以抑制好氧吸磷,进而在缺氧段实现反硝化除磷,从而达到了同步脱氮除磷的目的。最佳碳源投量为30～40mg/L,补充碳源负荷为12.8～17.2mgCOD/gMLSS;长期运行时系统的脱氮除磷性能稳定,对TN和PO34--P的平均去除率分别可达85.5%、91.4%,同时NO2--N可以作为反硝化聚磷菌吸磷的电子受体;在一个SBR周期内,pH值呈规律性变化并和氮、磷的吸收/释放相关联,通过监测pH值可以初步判断磷释放、氨氮转化和磷吸收的终点。
Simultaneous nitrogen and phosphorus removal from wastewater was investigated in SBR operated in anaerobic/aerobic/anoxic （AOA） mode. The results show that dosing an external carbon source in the aerobic phase can inhibit aerobic phosphate uptake to realize denitrifying phosphorus removal in the next anoxic phase, which leads to a simultaneous nitrogen and phosphorus removal. The optimum dosage of carbon source is 30 to 40 mg/L, in which the supplemental carbon load is 12.8 to 17.2 mgCOD/gMLSS. When the SBR operates for a long term, stable nutrient removal is achieved, and the average removal rates of TN and PO4^3- - P reach 85.5% and 91.4% , respectively. Nitrite can also be used as the electron acceptor during the anoxic phosphorus uptake by denitrifying phosphorus-accumulating bacteria. Further research reveals that in a SBR operation cycle, the variation of pH is regular and associated with the uptake and release of nitrogen and phosphorus in the wastewater. The pH monitoring can help to predict the ends of phosphorus release, ammonia conversion and phosphorus uptake.
出处
《中国给水排水》
CAS
CSCD
北大核心
2007年第17期19-22,共4页
China Water & Wastewater
基金
国家自然科学基金资助项目(50478054)
教育部新世纪优秀人才支持计划项目(NCENT-0770)
关键词
序批式活性污泥法
同步脱氮除磷
厌氧/好氧/缺氧
反硝化聚磷菌
SBR activated sludge process
simultaneous nitrogen and phosphorus removal
anaerobic/aerobic/anoxic
denitrifying phosphorus-accumulating bacteria
