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    METHOD FOR PHOSPHORUS REMOVAL AND RECOVERY USING ORGANIC CARBON SOURCE OF URBAN SEWAGE
    1.
    发明公开
    METHOD FOR PHOSPHORUS REMOVAL AND RECOVERY USING ORGANIC CARBON SOURCE OF URBAN SEWAGE 审中-公开

    公开(公告)号：US20230242427A1

    公开(公告)日：2023-08-03

    申请号：US18011121

    申请日：2020-08-04

    申请人： SUZHOU UNIVERSITY OF SCIENCE AND TECHNOLOGY

    发明人： Zhen BI ,  Yong HUANG ,  Yang PAN ,  Xiang LI

    IPC分类号： C02F3/30 ,  C02F3/12 ,  C01B25/00

    CPC分类号： C02F3/301 ,  C02F3/1278 ,  C02F3/308 ,  C01B25/003 ,  C02F2101/105

    摘要： A method for phosphorus removal and recovery using an organic carbon source of urban sewage, including: first filling a biofilm reactor with sewage; stirring under anaerobic conditions, phosphorus being released from a polyphosphate biofilm using an organic carbon source in the sewage; discharging a portion of the sewage after the aforementioned treatment into a recovery tank and storing same as a recovery liquid; performing aerobic aeration on the remaining part of the sewage after anaerobic treatment, such that phosphorus is absorbed by the polyphosphate biofilm until the concentration of phosphorus reaches a requirement for discharge; turning off the aeration device and discharging the sewage; returning the recovery liquid to the biofilm reactor, simultaneously adding sewage to fill the reactor, and repeating the aforementioned steps multiple times; and obtaining a phosphorus recovery liquid when the concentration of phosphorus in the recovery liquid reaches the requirements for a phosphorus recovery process.

    Processes for the removal and recovery of minor elements in wet-process phosphoric acid
    8.
    发明授权
    Processes for the removal and recovery of minor elements in wet-process phosphoric acid 有权
    在湿法磷酸中去除和回收少量元素的方法

    公开(公告)号：US09573810B2

    公开(公告)日：2017-02-21

    申请号：US14416264

    申请日：2013-07-21

    申请人： K-TECHNOLOGIES, INC.

    发明人： William W. Berry ,  Thomas E. Baroody

    IPC分类号： C01B25/00 ,  C01B25/238 ,  C01B17/96 ,  C01F11/46 ,  B01J39/04 ,  B01J39/14 ,  B01J49/00 ,  B01D15/20 ,  B01D15/36

    CPC分类号： C01B25/238 ,  B01D15/203 ,  B01D15/362 ,  B01J39/05 ,  B01J39/14 ,  B01J49/53 ,  C01B17/96 ,  C01F11/46

    摘要： In alternative embodiments, the invention provides processes and methods for the recovery or the removal of the so-called “Minor Elements” consisting of iron, aluminum and magnesium (expressed as oxides), from wet-process phosphoric acid using a continuous ion exchange approach. In alternative embodiments, use of processes and methods of the invention allows for the reduction of these Minor Elements with minimal phosphate losses and dilution in order to produce a phosphoric acid that is suitable for the production of fertilizer products such as world-class diammonium phosphate (DAP), merchant-grade phosphoric acid, superphosphoric acid, and other phosphoric acid products. Further, use of the invention would allow the use of lower grade phosphate rock or ore, which would greatly expand the potential phosphate rock reserve base for phosphate mining activities, and allow for better overall utilization of resources from a given developed mine site.

    摘要翻译： 在替代实施方案中，本发明提供了使用连续离子交换法从湿法磷酸回收或除去由铁，铝和镁（以氧化物形式）组成的所谓“次要元素”的方法和方法 。 在替代实施方案中，使用本发明的方法和方法允许以最小的磷酸盐损失和稀释来还原这些次要元素，以便产生适合于生产肥料产品的磷酸，例如世界级磷酸氢二铵（ DAP），商品级磷酸，超磷酸等磷酸产品。 此外，本发明的使用将允许使用较低等级的磷酸盐岩或矿石，这将大大扩大磷酸盐矿开采活动的潜在磷酸盐储备基础，并允许从给定的开发矿区更好地综合利用资源。