公开(公告)号：US20100233777A1

公开(公告)日：2010-09-16

申请号：US12681123

申请日：2008-10-06

申请人： Kartik Chandran ,  Ran Yu ,  Joon Ho Ahn

发明人： Kartik Chandran ,  Ran Yu ,  Joon Ho Ahn

IPC分类号： C12P3/00 ,  C12M1/34

CPC分类号： C02F3/006 ,  C02F3/02 ,  C02F2101/16 ,  C02F2103/001 ,  C02F2103/06 ,  C02F2103/20 ,  C02F2209/06 ,  C02F2209/14 ,  C02F2209/22 ,  C02F2209/44 ,  C02F2303/00 ,  Y02W10/15

摘要： Methods of controlling a nitrification reaction in a biological nitrogen removal reactor to favor partial nitrification of ammonia to nitrite instead of complete oxidation of ammonia to nitrate are disclosed. In some embodiments, the methods include the following: maintaining a pH in the reactor within a range that promotes growth of ammonia oxidizing bacteria; maintaining a concentration of dissolved oxygen in the reactor within a range that limits the ammonia oxidizing bacteria from completing nitrification; selecting an operational solids retention time within a range suitable for maintaining increasing concentrations of the ammonia oxidizing bacteria in the reactor while reducing concentrations of nitrite oxidizing bacteria in the reactor; and increasing a concentration of free ammonia in the reactor thereby inhibiting growth of the nitrite oxidizing bacteria in the reactor.

摘要翻译： 公开了在生物除氮反应器中控制硝化反应以有利于将氨部分硝化成亚硝酸盐而不是氨完全氧化成硝酸盐的方法。 在一些实施方案中，所述方法包括以下步骤：将反应器中的pH保持在促进氨氧化细菌生长的范围内; 在限制氨氧化细菌完成硝化的范围内保持反应器中溶解氧的浓度; 选择在适于维持反应器中氨氧化细菌浓度增加的范围内的操作固体停留时间，同时减少反应器中亚硝酸盐氧化细菌的浓度; 并增加反应器中游离氨的浓度，从而抑制反应器中亚硝酸盐氧化细菌的生长。

公开(公告)号：US20140339157A1

公开(公告)日：2014-11-20

申请号：US14083549

申请日：2013-11-19

申请人： Kartik Chandran ,  Ran Yu ,  Joon Ho Ahn

发明人： Kartik Chandran ,  Ran Yu ,  Joon Ho Ahn

IPC分类号： C02F3/00 ,  C02F3/02

CPC分类号： C02F3/006 ,  C02F3/02 ,  C02F2101/16 ,  C02F2103/001 ,  C02F2103/06 ,  C02F2103/20 ,  C02F2209/06 ,  C02F2209/14 ,  C02F2209/22 ,  C02F2209/44 ,  C02F2303/00 ,  Y02W10/15

摘要： Methods of controlling a nitrification reaction in a biological nitrogen removal reactor to favor partial nitrification of ammonia to nitrite instead of complete oxidation of ammonia to nitrate are disclosed. In some embodiments, the methods include the following: maintaining a pH in the reactor within a range that promotes growth of ammonia oxidizing bacteria; maintaining a concentration of dissolved oxygen in the reactor within a range that limits the ammonia oxidizing bacteria from completing nitrification; selecting an operational solids retention time within a range suitable for maintaining increasing concentrations of the ammonia oxidizing bacteria in the reactor while reducing concentrations of nitrite oxidizing bacteria in the reactor; and increasing a concentration of free ammonia in the reactor thereby inhibiting growth of the nitrite oxidizing bacteria in the reactor.

摘要翻译： 公开了在生物除氮反应器中控制硝化反应以有利于将氨部分硝化成亚硝酸盐而不是氨完全氧化成硝酸盐的方法。 在一些实施方案中，所述方法包括以下步骤：将反应器中的pH保持在促进氨氧化细菌生长的范围内; 在限制氨氧化细菌完成硝化的范围内保持反应器中溶解氧的浓度; 选择在适于维持反应器中氨氧化细菌浓度增加的范围内的操作固体停留时间，同时减少反应器中亚硝酸盐氧化细菌的浓度; 并增加反应器中游离氨的浓度，从而抑制反应器中亚硝酸盐氧化细菌的生长。

公开(公告)号：US08586337B2

公开(公告)日：2013-11-19

申请号：US12681123

申请日：2008-10-06

申请人： Kartik Chandran ,  Ran Yu ,  Joon Ho Ahn

发明人： Kartik Chandran ,  Ran Yu ,  Joon Ho Ahn

IPC分类号： C12P1/04 ,  C12M1/00

CPC分类号： C02F3/006 ,  C02F3/02 ,  C02F2101/16 ,  C02F2103/001 ,  C02F2103/06 ,  C02F2103/20 ,  C02F2209/06 ,  C02F2209/14 ,  C02F2209/22 ,  C02F2209/44 ,  C02F2303/00 ,  Y02W10/15

摘要： Methods of controlling a nitrification reaction in a biological nitrogen removal reactor to favor partial nitrification of ammonia to nitrite instead of complete oxidation of ammonia to nitrate are disclosed. In some embodiments, the methods include the following: maintaining a pH in the reactor within a range that promotes growth of ammonia oxidizing bacteria; maintaining a concentration of dissolved oxygen in the reactor within a range that limits the ammonia oxidizing bacteria from completing nitrification; selecting an operational solids retention time within a range suitable for maintaining increasing concentrations of the ammonia oxidizing bacteria in the reactor while reducing concentrations of nitrite oxidizing bacteria in the reactor; and increasing a concentration of free ammonia in the reactor thereby inhibiting growth of the nitrite oxidizing bacteria in the reactor.

摘要翻译： 公开了在生物除氮反应器中控制硝化反应以有利于将氨部分硝化成亚硝酸盐而不是氨完全氧化成硝酸盐的方法。 在一些实施方案中，所述方法包括以下步骤：将反应器中的pH保持在促进氨氧化细菌生长的范围内; 在限制氨氧化细菌完成硝化的范围内保持反应器中溶解氧的浓度; 选择在适于维持反应器中氨氧化细菌浓度增加的范围内的操作固体停留时间，同时减少反应器中亚硝酸盐氧化细菌的浓度; 并增加反应器中游离氨的浓度，从而抑制反应器中亚硝酸盐氧化细菌的生长。

公开(公告)号：US20110015082A1

公开(公告)日：2011-01-20

申请号：US12679582

申请日：2008-10-06

申请人： Kartik Chandran ,  Ran Yu

发明人： Kartik Chandran ,  Ran Yu

IPC分类号： C40B30/00 ,  C40B60/12

CPC分类号： C02F3/006 ,  C02F3/302 ,  C02F2209/005

摘要： Systems and methods for evaluating the operating conditions in a biological nitrogen removal reactor using gene expression and abundance tracking are disclosed. In some embodiments, the systems and methods include the following: obtaining a sample from the reactor during continuous reactor operation; expressing predetermined nitrification, denitrification, and structural genes for ammonia oxidizing bacteria contained in the sample to develop a sample genetic profile of the ammonia oxidizing bacteria; obtaining a genetic profile of a second bacteria substantially similar to the ammonia oxidizing bacteria, wherein the second bacteria was grown in a reactor having substantially optimum operating conditions; and comparing the sample genetic profile to the genetic profile of the second bacteria.

摘要翻译： 公开了使用基因表达和丰度跟踪来评估生物除氮反应器中的操作条件的系统和方法。 在一些实施例中，系统和方法包括以下：在连续反应器操作期间从反应器获得样品; 表达样品中所含的氨氧化细菌的预定硝化，反硝化和结构基因，以形成氨氧化细菌的样品遗传图谱; 获得与氨氧化细菌基本相似的第二细菌的遗传图谱，其中第二细菌在具有基本上最佳操作条件的反应器中生长; 并将样品遗传图谱与第二细菌的遗传图谱进行比较。