ION EXCHANGE REGENERATION PROCESS UTILIZING MEMBRANE DISTILLATION
    41.
    发明申请
    ION EXCHANGE REGENERATION PROCESS UTILIZING MEMBRANE DISTILLATION 审中-公开
    离子交换再生过程利用膜分离

    公开(公告)号:WO2017040531A1

    公开(公告)日:2017-03-09

    申请号:PCT/US2016/049495

    申请日:2016-08-30

    申请人: PEPSICO, INC.

    IPC分类号: C02F1/44 C02F1/42 C02F9/02

    摘要: Method for treating effluent waste from a cation-exchange column regeneration cycle, including backwashing the column; regenerating the column using rinse water and regenerant brine having a temperature warmer than room temperature, thereby forming waste effluent containing divalent cations; precipitating the divalent cations in a precipitation reactor at a temperature warmer than room temperature; filtering precipitation effluent; optionally, adjusting the filtered precipitation effluent pH; concentrating the filtered precipitation effluent via membrane-based water recovery, thereby forming separated concentrated salt and pure rinse water; and recirculating separated concentrated salt and pure rinse water back to the column for a subsequent regeneration cycle. Also, a system including an exhausted cation-exchange column; a chemical precipitation reactor; a filtration unit; an optional pH adjustment unit; and a membrane-based water recovery unit, wherein the system is a closed-loop through which salt and rinse water having a temperature warmer than room temperature recirculate.

    摘要翻译: 用于处理来自阳离子交换塔再生循环的流出物废物的方法,包括反冲洗柱; 使用温度比室温更高的冲洗水和再生盐水再生塔,从而形成含有二价阳离子的废液; 在温度高于室温的沉淀反应器中沉淀二价阳离子; 过滤沉淀废水; 任选地,调节过滤的沉淀流出物pH; 通过基于膜的水回收浓缩过滤的沉淀流出物,从而形成分离的浓盐和纯冲洗水; 并将分离的浓缩盐和纯净的冲洗水再循环回塔,用于随后的再生循环。 另外,包括排出的阳离子交换柱的系统; 化学沉淀反应堆; 过滤单元; 可选的pH调节单元; 和膜基水回收单元,其中该系统是闭环,通过该闭环,具有比室温温度更高的温度的盐和冲洗水再循环。

    SUBSURFACE WATER PURIFICATION METHOD
    43.
    发明申请
    SUBSURFACE WATER PURIFICATION METHOD 审中-公开
    地下水净化方法

    公开(公告)号:WO2016168866A2

    公开(公告)日:2016-10-20

    申请号:PCT/US2016/032058

    申请日:2016-05-12

    IPC分类号: B01D61/02

    摘要: A method of producing purified water in a subsurface environment is provided in which ambient subsurface source water is introduced into and through one or more ultrafiltration membrane units of a subsurface water treatment system and producing thereby an ultrafiltrate substantially free of solid particulates having a largest dimension greater than 0.1 microns. An electrochemical unit in fluid communication with at least one ultrafiltration membrane unit provides an antifoulant solution. An ultrafiltrate-rich backwash fluid and at least a portion of the antifoulant solution are delivered to at least one non-producing ultrafiltration membrane unit during a backwash cycle. A flux of source fluid through each of the ultrafiltration membrane units of less than thirty gallons per square foot per day limits the need for backwash cycles. A reduction in the number of backwash cycles enhances system autonomy and useful life, and limits the need for intervention for maintenance and component replacement.

    摘要翻译: 提供了一种在地下环境中生产净化水的方法,其中将环境地下水源水引入并通过地下水处理系统的一个或多个超滤膜单元并由此生产基本上不含水的超滤液 的最大尺寸大于0.1微米的固体颗粒。 与至少一个超滤膜单元流体连通的电化学单元提供防垢剂溶液。 在反洗循环期间将富含超滤液的反洗流体和至少一部分防污剂溶液输送到至少一个非生产超滤膜单元。 流过每个超滤膜单元的流体流量小于每加仑每平方英尺30加仑,限制了对反洗循环的需要。 反冲洗周期数量的减少增强了系统的自主性和使用寿命,并且限制了维护和部件更换干预的需要。

    A DRAW SOLUTE FOR FORWARD OSMOSIS
    50.
    发明申请
    A DRAW SOLUTE FOR FORWARD OSMOSIS 审中-公开
    用于前瞻性OSMOSIS的绘图解决方案

    公开(公告)号:WO2014175833A1

    公开(公告)日:2014-10-30

    申请号:PCT/SG2014/000185

    申请日:2014-04-28

    IPC分类号: B01D61/00 C02F1/44

    摘要: The present invention provides a draw solute for forward osmosis comprising a carbon dioxide responsive structural unit and a thermally responsive structural unit, wherein the draw solute is capable of reversibly switching between a protonated state and a deprotonated state. The present invention also provides a forward osmosis method utilising the draw solute.

    摘要翻译: 本发明提供一种用于正向渗透的吸附溶质,其包括二氧化碳响应结构单元和热响应结构单元,其中所述拉伸溶质能够在质子化状态和去质子化状态之间可逆地切换。 本发明还提供了一种利用吸附溶质的正向渗透方法。