作　　者： ; ; ; ;

机构地区： 广东工业大学环境科学与工程学院

出　　处： 《环境工程学报》 2010年第9期2029-2032,共4页

摘　　要： 以生物除磷脱氮污水处理厂污泥浓缩液为研究对象,采用正交实验方法,通过测定溶解性磷和NH4＋-N的变化探索pH值、[Mg2＋]/[PO34-]和[NH4＋]/[PO43-]对MAP法回收氮磷效率的影响。研究表明,pH值是影响氮磷回收的一个最重要因素,当pH值达到10时,磷回收率达到最大值（81.9%）,当pH值由9上升到11时,氮的去除率随pH值的升高而增加;[Mg2＋]/[PO43-]和[NH4＋]/[PO43-]都会影响鸟粪石（MAP）法对磷的回收率,比值越大,磷回收率越高,但当比值达到一定值后,磷回收率增长幅度趋于减缓,仅考虑磷的回收效率,[Mg2＋]/[PO43-]和[NH4＋]/[PO43-]的最优配比分别为1.4和6;氮去除率也受镁磷比和氮磷比的影响,当[Mg2＋]/[PO43-]为1.3时,氮去除率最高,而当[NH4＋]/[PO43-]为4~8时,氮去除率随着氮磷比的升高而逐渐降低。 Applying orthogonal design,the influences of pH,Mg/ P and N/ P on the process of MAP precipitation from sludge concentrated liquor were investigated.The results show that pH value is one of the very important operating parameters affecting nitrogen and phosphorus recovery efficiency,which reaches maximum（81.9%） when the pH value is 10,while nitrogen removal efficiency increases with pH value.The phosphorous recovery efficiency changes with the molar ratio of Mg2＋/PO3-4 and NH＋4/PO3-4.However,when the molar ratio of Mg2＋/PO3-4 exceeds 1.4 and the molar ratio of NH＋4/PO3-4 exceeds 6,the phosphorous recovery efficiency changes little.The molar ratio of Mg2＋/PO3-4 and NH＋4/PO3-4 can also influence nitrogen removal efficiency,and the optimal molar ratio of Mg2＋/PO3-4 is 1.3,while the molar ratio of NH＋4/PO3-4 ranges from 4 to 8,nitrogen removal efficiency declines.

关 键 词： 磷酸铵镁 污泥浓缩液 磷回收 氮去除

领　　域： [环境科学与工程]