鸟粪石

在此基础上又通过实验测定了Ni、Cr、Cd、Hg等几种重金属在鸟粪石沉淀中的含量，并分析了重金属夹带的机理是其磷酸盐和氢氧化物沉淀所致。

Based upon this result , the contents of several kinds of heavy metal including Ni 、 Cr and Cd in struvite were determined herein .

pH值调节至9.0左右时，生成的鸟粪石结晶体呈斜方晶；当pH值大于10.5时，生成的晶体比较细小，甚至结块。

When pH value adjusts to about 9.0 , the struvite formed is prismatic crystal ; when pH value is over 10.5 , the struvite formed is small , even lumped .

从理论上计算鸟粪石和副反应产物磷酸镁和氢氧化镁的条件性溶度积随pH的变化关系，并用浊点法测定了不同pH下鸟粪石在水中的溶解度数据。

Theoretically , the relationship between conditional dissolve product of magnesium phosphate and magnesium hydrate of byproduct and struvite and pH was explored herein .

设计正交实验讨论了三种构晶离子的摩尔配比和反应的pH对鸟粪石沉淀反应磷回收率（PRE）的影响，最后向反应体系中添加Ca2+考察不同Mg/Ca对PRE和沉淀产物成分的影响。

Design the orthogonality experiment impact of mole of match ratio and reactive pH having discussed three kinds crystal structure over guanite precipitation on reaction phosphorus coefficient of recovery ( PRE ) .

鸟粪石是一种难溶于水的白色晶体，其主要成分是六水合磷酸铵镁（MgNH4PO4·6H2O）。

Struvite [ MgNH_4PO_4 · 6H_2O ] is a white inorganic crystalline which is insoluble in water .

40例接种动物中，有16例检出膀胱结石，化学分析表明，结石成份为磷酸镁铵（MgNH4PO4·6H2O），矿物学名称为鸟粪石（Struvite）。

Among 40 cases of inoculated rats , urinary bladder stones were found in 16 cases . These stones were composed of struvite ( MgNH4PO4 · 6H2O ) .

鸟粪石结晶反应在猪粪和玉米秸秆堆肥中的应用

Application of Struvite Crystallization on Co-composting of Swine Manure and Cornstalk

鸟粪石沉淀法在汽油精炼废水中的应用

Application of Struvite Precipitation in Gasoline Refinery Wastewater Treatment

结果表明，10个自然病例中颗粒样和粉砂样尿结石的主要成分均为磷酸铵镁（鸟粪石）；

The results revealed that the major component of 10 field samples was struvite .

利用鸟粪石沉淀法可以去除污水中的磷。

Phosphorus can be removed by struvite formation .

鸟粪石除磷工艺研究进展

Resent advances in phosphorus removal with struvite formation

同时化学沉淀还有可能产生高品质的磷酸盐沉淀物，如鸟粪石。

Moreover , this method could produce high-quality of phosphate precipitates such as struvite .

1840至1880年之间，富含氮的鸟粪石对欧洲农业产生了巨大的影响。

Between 1840 and 1880 , guano nitrogen made a vast difference to European agriculture .

对城市污水厂剩余污泥水解酸化液形成鸟粪石的影响因素进行了试验研究。

This paper investigated the influence factors of phosphorus removal from centrifugate of acidified excess activated sludge .

温度会影响鸟粪石的溶解度，进而影响磷的回收率，鸟粪石的溶解度随温度升高而增大，因此磷回收率随温度升高而略有下降；

The solubility would be affected by temperature while the recycle ratio of phosphorus might then be influenced .

本文所研究的鸟粪石沉淀法即是一种可同时从污水中回收氮和磷的技术。

The technology of struvite precipitation researched in this paper could be applied to recovery nitrogen and phosphorus simultaneously .

鸟粪石法回收废水中磷的沉淀物的组成和晶形

Study on the composition and crystal shape of the precipitate obtained by struvite precipitation from wastewater for phosphorous recovery

磷酸盐是磷回收的主要形式，鸟粪石和磷酸钙分别适合用作肥料和工业原料。

Phosphate is the main form of phosphorus recovery in which struvite and calcium phosphate are suitable for fertilizer and industrial material respectively .

本文对鸟粪石的形成机理、形成条件以及鸟粪石沉淀法在废水脱氮除磷中的应用，作了全面的综述分析。

The mechanism and conditions of struvite formation are reviewed and the applications of struvite precipitation for phosphorus and nitrogen removal are discussed .

膀胱结石：饍食控制可能会把鸟粪石溶解，但草酸盐结石则需要开刀取出，除非是细小到可以随尿排出。

Bladder stones : struvite stones may dissolve with dietary manipulation but oxalate stones need to be surgically removed unless they are small enough to be expelled .

人们在智利干燥的高地发现了丰富的硝酸盐矿藏，并在19世纪后期逐渐取代了鸟粪石。

In the dry uplands of Chile , rich mineral nitrate deposits were then found , and gradually took the place of guano in the late 19th century .

鸟粪石结晶法处理猪场污水的研究现状及发展趋势鸟粪石法回收废水中磷的沉淀物的组成和晶形

STATUS AND DEVELOPMENT OF STRUVITE CRYSTALLIZATION FOR SWINE WASTEWATER TREATMENT Study on the composition and crystal shape of the precipitate obtained by struvite precipitation from wastewater for phosphorous recovery

通过投加镁盐形成鸟粪石沉淀，污泥消化液中过量的氮磷得到去除和回收，以提高污泥消化液的碳氮比。

To increasing the ratio of carbon to nitrogen in the sludge fermentation liquid , the excess ammonia and phosphate was recovered by adding Mg2 + to form the deposition of strive .

鸟粪石沉淀法可以同时回收污水中的氮、磷两种元素，而且本身是一种高效缓释复合肥料，因此近年来这一技术受到普遍关注。

Struvite precipitation can simultaneously recycle two elements of nitrogen and phosphorus in sewage , and itself is an effective slow-release compound fertilizer , therefore , this technology attracts universal attention in recent years .

此外，反应时间和搅拌强度对鸟粪石除磷脱氮效果的影响都不显著，我们在选择这两个参数的最佳值时，应该从鸟粪石的生成形态和自然沉降回收来考虑。

Otherwise , neither reaction time nor stirring intensity influence to struvite P and N Removals effect is obvious . While choosing optimum value of these two parameters we shall consider struvite formation shape and nature precipitation recycling .

本文主要根据三峡库区城市污水水质情况，结合旁路污泥减量工艺，利用鸟粪石结晶法来去除回收污水中的氮磷。

The thesis is mainly based on municipal sewage quality situation of Three Gorges Reservoir area on the Yangtze River , incorporating with by-pass sludge reduction technology , about using struvite crystallization method remove and recycle nitrogen and phosphorus in sewage .

作者对生成鸟粪石和磷酸钙的主要影响因素及鸟粪石和磷酸钙沉淀法在污水磷回收中的应用作了全面的概述，并对存在的问题作了简要分析。

Recovery of phosphorus in the forms of struvite and calcium phosphate is considered to be the most promising way . The influence factors and the application of struvite and calcium phosphate precipitation are reviewed and discussed , and the problems existing are analyzed as well .