Method for reducing monovalent ions in concentrate of nanofiltration system and the nanofiltration system

    公开(公告)号:US11406940B2

    公开(公告)日:2022-08-09

    申请号:US16498201

    申请日:2018-03-29

    Abstract: This specification describes a method for lowering the content of monovalent ions in a final concentrate of a nanofiltration system relative to a brine and a corresponding nanofiltration system. The nanofiltration system comprises at least three stages of nanofiltration, wherein the concentrate from each segment flows into the next segment. A feed stream is sent into one stage to generate a concentrate stream, and a first portion of the concentrate stream is recirculated to the one stage. The pH of the feed stream is controlled in a range of 2-7. The temperature of the feed stream is in a range of 20-60° C. The feed stream includes the recirculated concentrate stream and at least part of a concentrate generated from an upstream stage. The method and the system described herein can reduce the concentration of monovalent ions in the final concentrate during a nanofiltration separation process.

    Polyglycerol fatty acid esters (PGE) for corn oil extraction

    公开(公告)号:US11339349B2

    公开(公告)日:2022-05-24

    申请号:US17040275

    申请日:2018-06-13

    Abstract: An oil separation treatment composition providing a process stream mixture from a corn to ethanol process, and one or more polyglycerol esters of fatty acids (PGE) or mixture of PGE. A method for recovering oil in a corn to ethanol process wherein oil and solids are present in a process stream mixture, the method providing adding to the process stream mixture an oil separation treatment, the oil separation treatment comprises polyglycerol esters of fatty acids (PGE) or mixture of PGE.

    MABR MEDIA FOR SUPPORTING AOB AND ANNAMOX BACTERIA AND PROCESS FOR DEAMMONIFICATION OF WASTEWATER

    公开(公告)号:US20210355011A1

    公开(公告)日:2021-11-18

    申请号:US17284568

    申请日:2019-10-18

    Abstract: This specification describes a membrane aerated biofilm media and reactor (MABR) having a discontinuous layer of a porous material applied to the outer surface of a gas-transfer membrane. The porous material may have a void fraction of 50% or more. The porous material may have a thickness of up to about 500 microns and a pattern on the same order of magnitude as its thickness. The media may be used to carry on a deammonification reaction. In use, ammonia oxidizing bacteria (AOB) and annamox bacteria grown in or on the media, with the annamox bacteria located primarily in the porous material. The supply of oxygen through the gas-transfer membrane is limited to suppress the growth of nitrite oxidizing bacteria (NOB). Excess biofilm is removed, for example by coarse bubble scouring. The media may be placed in an anoxic zone of an activated sludge plant, which may be upstream of an aerobic zone.

    Reverse osmosis system for use with a wellbore and methods of assembling the same

    公开(公告)号:US10828605B2

    公开(公告)日:2020-11-10

    申请号:US15125294

    申请日:2015-03-13

    Abstract: A reverse osmosis unit for processing a feed solution is provided. The unit includes a pressure vessel includes an inlet end, an outlet end, and a vessel body extending between the inlet end and the outlet end. The reverse osmosis unit further includes a plurality of first membrane modules positioned within the pressure vessel. Each first membrane module of the plurality of first membrane modules has a first salt permeance value. At least one second membrane module is positioned within the pressure vessel and coupled in flow communication to the plurality of first membrane modules. The at least one second membrane module has a second salt permeance value that is different from the first salt permeance value.

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