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    • 10. 发明申请
    • PROCESS FOR SELENIUM REMOVAL WITH BIOLOGICAL, CHEMCIAL AND MEMBRANE TREATMENT
    • 用生物,化学和膜处理去除硒的方法
    • WO2018004582A1
    • 2018-01-04
    • PCT/US2016/040264
    • 2016-06-30
    • GENERAL ELECTRIC COMPANY
    • SYED, Wajahat Hussain
    • C02F9/00B01D61/14B01D61/16B01D61/58C02F101/10C02F103/18C02F1/56C02F1/44C02F3/28
    • Water containing selenium, for example flue gas desulfurization (FGD) blowdown water is treated with a combination of biological and chemical treatment and membrane filtration. The biologically treated water is dosed with a dithiocarbamate compound and flocculated prior to membrane filtration. Optionally, the treatment may be enhanced with one or more adsorptive agents prior to, or in conjunction with, membrane filtration. Membrane concentrate may be re-circulated to one or more biological treatment zones. The biological treatment may be by way of suspended growth, fixed growth on a moving bed, or both. One or more biological treatment zones may be controlled considering their oxygen reduction potential (ORP). Optionally, the biological treatment includes an aerobic zone following one or more anoxic or anaerobic zones. The non-aerobic zones remove selenium and optionally nitrogen and sulfur. The aerobic zone removes carbon, which may include carbon added as a nutrient in a non-aerobic zone.
    • 含有硒的水例如烟气脱硫(FGD)排污水用生物和化学处理以及膜过滤的组合进行处理。 生物处理过的水中加入二硫代氨基甲酸盐化合物并在膜过滤之前絮凝。 任选地,可以在膜过滤之前或与膜过滤结合使用一种或多种吸附剂来增强处理。 膜浓缩物可以再循环到一个或多个生物处理区域。 生物处理可以通过悬浮生长,在移动床上固定生长或两者兼有。 考虑到它们的氧还原电位(ORP),可以控制一个或多个生物处理区。 任选地,生物处理包括在一个或多个缺氧或厌氧区之后的好氧区。 非好氧区去除硒和任选的氮和硫。 好氧区去除碳,其中可能包括作为养分在非好氧区添加的碳。