Process control for an immersed membrane system
    3.
    发明申请
    Process control for an immersed membrane system 有权
    浸入膜系统的过程控制

    公开(公告)号:US20070039888A1

    公开(公告)日:2007-02-22

    申请号:US11484815

    申请日:2006-07-11

    IPC分类号: B01D61/00

    摘要: An immersed membrane system or process may use measured or calculated process information to optimize one or more process operating parameters to improve performance or reduce operating costs. An on-line process control system or method may use the resistance in series method in operating an immersed membrane water treatment system. A process control system or process may consider resistance values and adjust operational parameters such as membrane aeration frequency factor, membrane aeration flow, permeate flux, permeation duration, backwash flow and duration, relaxation duration or maintenance or recovery chemical cleaning frequencies in order to reduce the operational costs related to membrane fouling removal.

    摘要翻译: 浸入的膜系统或过程可以使用测量或计算的过程信息来优化一个或多个过程操作参数以改善性能或降低操作成本。 在线过程控制系统或方法可以使用串联方法来操作浸入式膜水处理系统。 过程控制系统或过程可以考虑电阻值并调整操作参数,例如膜曝气频率因子,膜曝气流量,渗透通量,渗透持续时间,反冲洗流量和持续时间,松弛持续时间或维持或恢复化学清洗频率,以便减少 与膜污染去除相关的运营成本。

    Method and apparatus for testing the integrity of filtering membranes
    7.
    发明授权
    Method and apparatus for testing the integrity of filtering membranes 失效
    用于测试过滤膜完整性的方法和设备

    公开(公告)号:US06324898B1

    公开(公告)日:2001-12-04

    申请号:US09468779

    申请日:1999-12-21

    IPC分类号: G01N1508

    摘要: An improvement to an outside/in hollow fiber membrane filtration system includes a source of suction on the lumens of the membranes or pressure on the outside of the membranes operable without producing permeate and an air collector to collect any air that passes from the outside of the membranes to their lumens during an integrity test. A method for testing the integrity of filtering membranes involves exposing a first side of the membranes to air while a second side of the membranes remains exposed to water. A transmembrane pressure forces air through defects of concern in the membranes. Air that passes through a set of membranes is collected and its amount measured and compared to an acceptable amount of air to indicate whether there is a defect in the set of membranes. Preferably, air is collected individually from a plurality of membrane units in a filtration train and the amounts so collected compared to indicate if one of the membrane units is defective.

    摘要翻译: 外部/中空纤维膜过滤系统的改进包括膜的内腔上的抽吸源或膜的外部的压力,可以在不产生渗透物的情况下运行,空气收集器收集从外部流过的空气 在完整性测试期间,膜到其腔。 用于测试过滤膜的完整性的方法包括将膜的第一侧暴露于空气,同时膜的第二侧保持暴露于水。 跨膜压力迫使空气通过膜中所关注的缺陷。 收集通过一组膜的空气,并测量其量并与可接受量的空气进行比较,以指示该组膜是否存在缺陷。 优选地,从过滤系中的多个膜单元分别收集空气,并且相比于此收集的量来指示膜单元之一是否有缺陷。