微量元素对活性污泥脱氮除磷效果影响的对比试验研究

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.

Comparison of Effects of Different Trace Elements on Nitrogen and Phosphorus Removal Efficiency in Activated Sludge System

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.