pH及磷浓度对活性污泥铁还原协同除磷的影响  

Effect of pH and phosphorus concentration on phosphorus removal by dissimilatory Fe(Ⅲ) reduction in activated sludge

作　　者：王亚娥[1] 翟思媛[1] 耿牧歌 李杰[1] 

机构地区：[1]兰州交通大学环境与市政工程学院,兰州730070

出　　处：《环境工程学报》2015年第8期4002-4008,共7页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51068015)

摘　　要：采用厌氧恒温培养,以氧化铁皮为外加Fe(Ⅲ)源,研究了不同初始磷浓度和pH对活性污泥体系异化Fe(Ⅲ)还原协同除磷的影响,并通过分析反应前后活性污泥中不同形态磷的变化初步探讨了体系除磷机理。结果表明,初始磷浓度升高对活性污泥异化Fe(Ⅲ)还原有明显的抑制作用,但在铁源充足的条件下体系仍能表现出较好的除磷效果,且随着初始磷浓度的增加除磷速率明显上升;不同初始pH条件对异化Fe(Ⅲ)还原过程影响显著,中性偏碱性的条件更有利于Fe(Ⅱ)的累积;除磷效果与其呈正相关。结合活性污泥中各形态磷含量的分析,可以证明外加Fe(Ⅲ)源的活性污泥体系发生明显异化Fe(Ⅲ)还原协同除磷现象。After anaerobic and constant temperature incubation, the effect of different influent loading and initial pH conditions on alienation Fe （Ⅲ ） reduction with phosphorus removing in activated sludge system was discussed by using iron oxide as the Fe （ Ⅲ） source , and the mechanism of phosphorus removing was investiga- ted preliminary by analyzing the variation of different forms of phosphorus in activated sludge before and after the reaction. The results showed that high concentration of phosphorus had significant inhibition on activated sludge alienation Fe （ Ⅲ ） reduction, but all systems showed a relatively better effect on phosphorus removal under the condition of having adequate Fe source, and the rate of phosphorus removing significantly increased with the in- creasing of initial phosphorus concentration. Different initial pH had significant effect on alienation Fe （ Ⅲ ） re- duction, and the neutral to slightly alkaline condition was better for Fe（Ⅱ） accumulation and the effect of phos- phorus removing had positive correlation with it. By analyzing content of different forms of phosphorus in activa- ted sludge system, the significant phenomenon of alienation Fe （ Ⅲ ） reduction collaborative with phosphorus re- moving in the activated sludge system which added Fe （ Ⅲ ） source can be proved.

关 键 词：微生物异化Fe(Ⅲ)还原 铁还原菌 影响因素 除磷 机理 

分 类 号：X705[环境科学与工程—环境工程]