摘要
以实际城镇污水为研究对象,通过静态与连续流的对比试验,考察了几种微量元素及其投加方式对活性污泥脱氮除磷效果的影响.结果表明:Fe3+对活性污泥系统脱氮除磷有较好的促进作用,其有效的投加浓度范围为10～20 mg/L,Co2+和Ni2+对活性污泥脱氮除磷效果无明显改善;Fe3+、Co2+和Ni2+相互之间无明显促进和拮抗的作用;Fe3+采用连续投加的方式,系统污染物去除率及活性污泥比好氧呼吸速率等方面提高明显,系统脱氮除磷功能明显加强,Co2+和Ni2+的系统投加方式的改变对活性污泥脱氮除磷效果的影响不明显.
This paper mainly discussed the effects of trace elements and their dosing methods on nitrogen and phosphorus removal efficiency.The results show that Fe3＋ has been proved to be a better role in enhancing the nitrogen and phosphorus removal efficiency,and the economical dosing of Fe3＋ ranges from10 mg/L to 20 mg/L.The dosing of Co2＋ and Ni2＋ in activated sludge system has smaller effect on enhancing nitrogen and phosphorus removal efficiency.Fe3＋,Co2＋ and Ni2＋ do not have mutual promotion and antagonism effect.The pollutant removal efficiency and oxygen respiration rate of activated sludge system increased significantly as Fe3＋ was dosed continuously,and the nitrogen and phosphorus removal efficiency was also enhanced.The change of dosing methods of Co2＋ and Ni2＋ does not have obvious effect on the removal of nitrogen and phosphorus.
出处
《青岛理工大学学报》
CAS
2011年第4期78-83,共6页
Journal of Qingdao University of Technology
基金
青岛市应用基础研究重点项目(09-1-3-1-jch)
关键词
微量元素
脱氮除磷
功能强化
投加方式
trace element
nitrogen and phosphorus removal
function enhanced
dosing method
