METHOD FOR REDUCING COD OF WASTEWATER WITH IMPROVED UTILIZATION EFFICIENCY OF OZONE

    公开(公告)号:US20170174541A1

    公开(公告)日:2017-06-22

    申请号:US15341886

    申请日:2016-11-02

    发明人: Huang Yaoqi

    摘要: Provided is a method for reducing COD of wastewater with improved utilization efficiency of ozone. The method achieves an objective by adding agents for removing hydroxyl radical scavengers produced by base-catalyzed ozone advanced oxidation to wastewater. The addition of calcium ion, barium ion, etc. to a base-catalyzed ozonation system makes the hydroxyl radical scavengers form precipitates, separated from water and lose the capability of scavenging hydroxyl radicals, thereby enhancing ozone utilization efficiency. Furthermore, calcium ion, barium ion, etc. form precipitates with partial organic acids yielded in the wastewater ozonation and are separated from water, hence diminishing ozone consumption and indirectly improving the ozone utilization efficiency in the wastewater treatment. The present invention can not only significantly enhance the reaction rate and utilization efficiency of ozone, saving reaction time and costs, but also enable complete mineralization of the organic compounds, significantly reducing COD and total phosphorus of wastewater.

    PARTICLE SUSPENSIONS OF FLOCCULATING POLYMER POWDERS AND POWDER FLOCCULANT POLYMER BLENDS
    5.
    发明申请
    PARTICLE SUSPENSIONS OF FLOCCULATING POLYMER POWDERS AND POWDER FLOCCULANT POLYMER BLENDS 有权
    絮凝聚合物粉末和粉末絮凝剂聚合物混合物的颗粒悬浮液

    公开(公告)号:US20150144572A1

    公开(公告)日:2015-05-28

    申请号:US14092385

    申请日:2013-11-27

    申请人: PSMG, LLC

    发明人: Jason Holt

    IPC分类号: C02F1/56

    摘要: Powder blends are described comprising blends of particulate water soluble high molecular weight polymer flocculants. The polymer flocculants can include polyethylene oxide, polyDadmac, Dadmac-acrylamide copolymers, copolymers thereof and combinations thereof. The powder blends allows the use of fine powders while reducing potential air quality and safety issues. The powder blends can be used for waste water purification, fiber dewatering, and the like. The powder blends can be diluted by a water dilution flow prior to entering a waste water stream.

    摘要翻译: 描述了包含颗粒状水溶性高分子量聚合物絮凝剂的共混物的粉末混合物。 聚合物絮凝剂可以包括聚环氧乙烷,聚Dadmac,Dadmac-丙烯酰胺共聚物,其共聚物和它们的组合。 粉末混合物允许使用细粉,同时减少潜在的空气质量和安全问题。 粉末混合物可用于废水净化,纤维脱水等。 粉末混合物可以在进入废水流之前用水稀释流稀释。

    PARTICLE SUSPENSIONS OF FLOCCULATING POLYMER POWDERS AND POWDER FLOCCULANT POLYMER BLENDS
    6.
    发明申请
    PARTICLE SUSPENSIONS OF FLOCCULATING POLYMER POWDERS AND POWDER FLOCCULANT POLYMER BLENDS 有权
    絮凝聚合物粉末和粉末絮凝剂聚合物混合物的颗粒悬浮液

    公开(公告)号:US20140158633A1

    公开(公告)日:2014-06-12

    申请号:US14182158

    申请日:2014-02-17

    申请人: PSMG, LLC

    发明人: Jason Holt

    IPC分类号: C02F1/52 C08L33/26 C08L71/02

    摘要: Powder blends are described comprising blends of particulate water soluble high molecular weight polymer flocculants. The polymer flocculants can include polyethylene oxide, polyacrylamide, copolymers thereof and combinations thereof. The powder blends allows the use of fine powders while reducing potential air quality and safety issues. The powder blends can be used for waste water purification, fiber dewatering, and the like. The powder blends can be diluted by a water dilution flow prior to entering a waste water stream.

    摘要翻译: 描述了包含颗粒状水溶性高分子量聚合物絮凝剂的共混物的粉末混合物。 聚合物絮凝剂可包括聚环氧乙烷,聚丙烯酰胺,其共聚物及其组合。 粉末混合物允许使用细粉,同时减少潜在的空气质量和安全问题。 粉末混合物可用于废水净化,纤维脱水等。 粉末混合物可以在进入废水流之前用水稀释流稀释。

    Systems and Methods for Achieving Partial Nitrification in a Biological Nitrogen Removal Reactor
    7.
    发明申请
    Systems and Methods for Achieving Partial Nitrification in a Biological Nitrogen Removal Reactor 有权
    在生物除氮反应器中实现部分硝化的系统和方法

    公开(公告)号:US20100233777A1

    公开(公告)日:2010-09-16

    申请号:US12681123

    申请日:2008-10-06

    IPC分类号: C12P3/00 C12M1/34

    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。