Pulsed backwash for immersed membranes
    26.
    发明授权
    Pulsed backwash for immersed membranes 有权
    浸入膜的脉冲反冲洗

    公开(公告)号:US06547968B1

    公开(公告)日:2003-04-15

    申请号:US09425235

    申请日:1999-10-25

    Abstract: A method and apparatus for chemical cleaning microfiltration and ultrafiltration membranes immersed in a tank involves backwashing a chemical cleaner through the membranes while the tank is empty of tank water. A backwash pump which drives the chemical cleaner is controlled by a speed controller which is in turn connected to a programmable logic control and, preferably pressure and flow indicators. The backwash pump is operated to supply the chemical cleaner to the membranes in pulses. The pressure of the pulses is high enough to reduce the relative size of pressure differentials between membranes or portions of membranes in varying places in the tank. The duration and frequency of the pulses is chosen to provide an appropriate contact time of the chemical, preferably without allowing the membranes to dry between pulses and without using excessive amounts of chemical.

    Abstract translation: 用于化学清洗的方法和装置浸在罐中的微滤膜和超滤膜包括在罐没有罐水的情况下将化学清洁剂反向冲洗通过膜。 驱动化学清洁剂的反冲洗泵由速度控制器控制,速度控制器又连接到可编程逻辑控制器,优选压力和流量指示器。 操作反洗泵以脉冲将化学清洁剂供应到膜中。 脉冲的压力足够高以减少在罐中不同位置的膜或膜部分之间的压力差的相对尺寸。 选择脉冲的持续时间和频率以提供化学品的适当接触时间,优选不允许膜在脉冲之间干燥并且不使用过量的化学品。

    Modular shipboard membrane bioreactor system for combined wastewater
streams
    28.
    发明授权
    Modular shipboard membrane bioreactor system for combined wastewater streams 失效
    用于组合废水流的模块化船载膜生物反应器系统

    公开(公告)号:US5254253A

    公开(公告)日:1993-10-19

    申请号:US934879

    申请日:1992-08-21

    Applicant: Henry Behmann

    Inventor: Henry Behmann

    Abstract: Raw sewage ("black water" from toilets), wastewater from showers, sinks, kitchen facilities ("grey water") and oily water from the bilge of a host vessel ("oily water"), in combination, unexpectedly provide the essential nutrients for a live mass of mixed microorganisms which are peculiarly well-adapted to ingest the nutrients. To facilitate availability of oxygen to the microorganisms so as to provide growth of the microorganisms, and also, to allow them destroy to themselves, excess oxygen is discharged, in a combination of microbubbles and macrobubbles, into a membrane bioreactor ("MBR"). The mixture of bubbles is preferably generated with coarse (>2 mm) and fine (

    Abstract translation: 原污水(来自厕所的“黑水”),来自淋浴,水槽,厨房设施(“灰水”)的污水和来自船舶舱底的油性水(“油性水”)组合,意外地提供必需的营养物质 用于混合微生物的活体,其特别适于摄取营养物质。 为了促进对微生物的氧气的供应以提供微生物的生长,并且为了使它们自身破坏,将过量的氧气以微泡和大泡泡的组合排放到膜生物反应器(“MBR”)中。 气泡的混合物最好用粗(> 2毫米)和细(<20微米)的气泡扩散器产生。 不管是单独的辅助流还是抽出空气的再循环流可以提供粗气泡。 空气被夹带在喷射式曝气机或喷射器中,在从MBR中取出的活性污泥的循环回路中。 将MBR的另一部分内容物泵送到提供优质品质的水(渗透物)的半透膜中。 将剩余的浓缩物导至产生微量浓缩物的尾流的气体微粉碎装置。 尾喷射返回到MBR以提供动能,以保持MBR中液体流速的高速度。 一部分浓缩物被处理。 优选地,待在船上处理的废液基本上不超过约21m 3 /天。

    Process for providing oxygen to a liquid
    30.
    发明授权
    Process for providing oxygen to a liquid 有权
    向液体提供氧气的方法

    公开(公告)号:US07699985B2

    公开(公告)日:2010-04-20

    申请号:US11949383

    申请日:2007-12-03

    Abstract: A membrane supported biofilm reactor uses modules having fine, hollow fibers, for example, made from melt spun thermoplastic polymers treated after spinning to increase their permeability to oxygen, used, for example, in tows or formed into a fabric. In one module, one or more sheets of the fabric are potted into a module to enable oxygen containing gas to be supplied to the lumens of the hollow fibers. Various reactors and processes, for example to treat wastewater, using such modules are described. In one process, oxygen travels through fibers, optionally through an attached biofilm, to oxygenate surrounding water. Mechanical, chemical and biological methods, for example endogenous respiration, are used to control the thickness of the biofilm.

    Abstract translation: 膜支撑的生物膜反应器使用具有细的中空纤维的模块,例如由旋转后处理的熔融热塑性聚合物制成,以增加其对氧的渗透性,例如用于丝束或形成织物。 在一个模块中,将一个或多个织物片浸入模块中,以使含氧气体能够供应到中空纤维的内腔。 描述了使用这种模块的各种反应器和工艺,例如处理废水。 在一个过程中,氧通过纤维,任选地通过附着的生物膜,以使周围的水氧化。 机械,化学和生物学方法,例如内源性呼吸,用于控制生物膜的厚度。

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