公开(公告)号：US20120024798A1

公开(公告)日：2012-02-02

申请号：US12844053

申请日：2010-07-27

申请人： Timothy Michael PICKETT ,  Yanguo Ma ,  Jill Sonstegard

发明人： Timothy Michael PICKETT ,  Yanguo Ma ,  Jill Sonstegard

IPC分类号： C02F9/04 ,  C02F3/00 ,  C02F1/70 ,  C02F1/72 ,  C02F1/58

CPC分类号： C02F1/72 ,  C02F1/722 ,  C02F1/76 ,  C02F3/06 ,  C02F3/341 ,  C02F9/00 ,  C02F2101/106 ,  C02F2305/06 ,  Y02W10/15

摘要： Selenium in the form of a reduced species such as selenocyanate is oxidized to produce an oxidized selenium species such as selenate or selenite, and then a biological reduction process is used to remove selenium from the oxidized selenium species. In an example, a chemical oxidant is added to a wastewater containing selenocyanate to produce selenate and selenite. The partially treated wastewater is then fed to a reactor containing a fixed media supporting a biofilm with selenium reducing organisms. The selenium in the selenate and selenite is reduced to an insoluble form of selenium, such as elemental selenium, which precipitates from the wastewater.

摘要翻译： 被还原物质如硒氰化物形式的硒被氧化以产生氧化硒物质如硒酸盐或亚硒酸盐，然后使用生物还原方法从氧化硒物质中除去硒。 在一个实例中，将化学氧化剂加入到含有硒氰酸酯的废水中以产生硒酸盐和亚硒酸盐。 然后将经部分处理的废水进料至含有还原生物体的生物膜支持生物膜的固定介质的反应器。 硒酸盐和亚硒酸盐中的硒被还原成不溶性形式的硒，例如从废水中沉淀的元素硒。