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    Osmotic desalination methods and associated systems
    3.
    发明授权
    Osmotic desalination methods and associated systems 有权

    公开(公告)号：US10518221B2

    公开(公告)日：2019-12-31

    申请号：US15747907

    申请日：2016-07-29

    Applicant: Gradiant Corporation

    Inventor： Looh Tchuin Choong ,  Prakash Narayan Govindan ,  Maximus G. St. John ,  Steven Lam ,  Jonn-Ross Andrews ,  Karim M. Chehayeb

    IPC: B01D61/58 ,  B01D61/00 ,  B01D61/02 ,  C02F1/44 ,  C02F103/08

    Abstract: Provided herein are osmotic desalination methods and associated systems. According to certain embodiments, multiple osmotic membranes may be used to perform a series of osmosis steps, such that an output stream having a relatively high water purity—compared to a water purity of an aqueous feed stream—is produced. In some embodiments, multiple draw streams can be used to produce aqueous product streams having sequentially higher purities of water. Certain embodiments are related to osmotic desalination systems and methods in which forward osmosis is used to produce a first product stream having a relatively high water purity relative to an aqueous feed stream, and reverse osmosis is used to perform a second step (and/or additional steps) on the first product stream. In some embodiments, multiple reverse osmosis steps can be used in series to perform a net desalination process.

    OSMOTIC DESALINATION METHODS AND ASSOCIATED SYSTEMS
    6.
    发明申请
    OSMOTIC DESALINATION METHODS AND ASSOCIATED SYSTEMS 审中-公开

    公开(公告)号：US20200147554A1

    公开(公告)日：2020-05-14

    申请号：US16681533

    申请日：2019-11-12

    Applicant: Gradiant Corporation

    Inventor： Looh Tchuin Choong ,  Prakash Narayan Govindan ,  Maximus G. St. John ,  Steven Lam ,  Jonn-Ross Andrews ,  Karim M. Chehayeb

    IPC: B01D61/58 ,  C02F1/44 ,  B01D61/02 ,  B01D61/00

    Abstract: Provided herein are osmotic desalination methods and associated systems. According to certain embodiments, multiple osmotic membranes may be used to perform a series of osmosis steps, such that an output stream having a relatively high water purity—compared to a water purity of an aqueous feed stream—is produced. In some embodiments, multiple draw streams can be used to produce aqueous product streams having sequentially higher purities of water. Certain embodiments are related to osmotic desalination systems and methods in which forward osmosis is used to produce a first product stream having a relatively high water purity relative to an aqueous feed stream, and reverse osmosis is used to perform a second step (and/or additional steps) on the first product stream. In some embodiments, multiple reverse osmosis steps can be used in series to perform a net desalination process.

    SYSTEMS AND METHODS FOR TREATMENT OF WATER, SUCH AS OILFIELD WASTEWATER, VIA CHEMICAL COAGULATION
    7.
    发明申请
    SYSTEMS AND METHODS FOR TREATMENT OF WATER, SUCH AS OILFIELD WASTEWATER, VIA CHEMICAL COAGULATION 审中-公开

    公开(公告)号：US20170144906A1

    公开(公告)日：2017-05-25

    申请号：US15364785

    申请日：2016-11-30

    Applicant: Gradiant Corporation

    Inventor： Jonn-Ross Andrews ,  Prakash Narayan Govindan ,  Maximus G. St. John ,  Steven Lam

    IPC: C02F1/52 ,  C02F1/04 ,  C02F1/56

    CPC classification number: C02F1/5245 ,  C02F1/04 ,  C02F1/5236 ,  C02F1/56 ,  C02F1/66 ,  C02F11/14 ,  C02F2001/007 ,  C02F2103/06 ,  C02F2103/10 ,  C02F2103/365

    Abstract: Described herein are systems and methods for treating an aqueous input stream comprising at least one suspended and/or emulsified immiscible phase (e.g., oil, grease) and, in some cases, one or more additional contaminants, such as solubilized bicarbonate (HCO3−) ions, solubilized divalent cations (e.g., Ca2+, Mg2+), solubilized trivalent cations (e.g., Fe3+, Al3+), organic material (e.g., humic acid, fulvic acid), hydrogen sulfide (H2S), and/or suspended solids. According to certain embodiments, the aqueous feed stream is supplied to a water treatment system comprising a chemical coagulation apparatus and a suspended solids removal apparatus (e.g., a clarifier). Within the chemical coagulation apparatus, an amount of an inorganic coagulant (e.g., aluminum chlorohydrate, polyaluminum chloride), an amount of a strong base (e.g., sodium hydroxide), and an amount of a polyelectrolyte (e.g., polyacrylamide) may be added to the aqueous input stream to form a chemically-treated stream. In some embodiments, the inorganic coagulant, strong base, and/or polyelectrolyte may induce coagulation and/or flocculation of at least a portion of the contaminants within the aqueous input stream, and the chemically-treated stream may comprise a plurality of flocs (i.e., particle agglomerates). In some embodiments, the chemically-treated stream is directed to flow to the suspended solids removal apparatus. Within the suspended solids removal apparatus, a plurality of flocs may be removed from the chemically-treated stream to form a contaminant-diminished stream having a lower concentration of contaminants than the aqueous input stream. In some embodiments, the chemically-treated stream and the contaminant-diminished stream each have a pH of about 8 or less. In some embodiments, the chemically-treated stream and the contaminant-diminished stream each have a temperature of about 15° C. or less.

    SYSTEMS AND METHODS FOR TREATMENT OF WATER, SUCH AS OILFIELD WASTEWATER, VIA CHEMICAL COAGULATION
    9.
    发明申请
    SYSTEMS AND METHODS FOR TREATMENT OF WATER, SUCH AS OILFIELD WASTEWATER, VIA CHEMICAL COAGULATION 有权

    公开(公告)号：US20210147265A1

    公开(公告)日：2021-05-20

    申请号：US17062472

    申请日：2020-10-02

    Applicant: Gradiant Corporation

    Inventor： Jonn-Ross Andrews ,  Prakash Narayan Govindan ,  Maximus G. St. John ,  Steven Lam

    IPC: C02F1/52 ,  C02F11/14 ,  C02F1/04 ,  C02F1/56

    Abstract: Described herein are systems and methods for treating an aqueous input stream comprising at least one suspended and/or emulsified immiscible phase (e.g., oil, grease) and, in some cases, one or more additional contaminants, such as solubilized bicarbonate (HCO3−) ions, solubilized divalent cations (e.g., Ca2+, Mg2+), solubilized trivalent cations (e.g., Fe3+, Al3+), organic material (e.g., humic acid, fulvic acid), hydrogen sulfide (H2S), and/or suspended solids. According to certain embodiments, the aqueous feed stream is supplied to a water treatment system comprising a chemical coagulation apparatus and a suspended solids removal apparatus (e.g., a clarifier). Within the chemical coagulation apparatus, an amount of an inorganic coagulant (e.g., aluminum chlorohydrate, polyaluminum chloride), an amount of a strong base (e.g., sodium hydroxide), and an amount of a polyelectrolyte (e.g., polyacrylamide) may be added to the aqueous input stream to form a chemically-treated stream. In some embodiments, the inorganic coagulant, strong base, and/or polyelectrolyte may induce coagulation and/or flocculation of at least a portion of the contaminants within the aqueous input stream, and the chemically-treated stream may comprise a plurality of flocs (i.e., particle agglomerates). In some embodiments, the chemically-treated stream is directed to flow to the suspended solids removal apparatus. Within the suspended solids removal apparatus, a plurality of flocs may be removed from the chemically-treated stream to form a contaminant-diminished stream having a lower concentration of contaminants than the aqueous input stream. In some embodiments, the chemically-treated stream and the contaminant-diminished stream each have a pH of about 8 or less. In some embodiments, the chemically-treated stream and the contaminant-diminished stream each have a temperature of about 15° C. or less.

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