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1. 发明授权

US5520812A Process for the biological purification of water 失效
标题翻译：水的生物净化过程
公开(公告)号：US5520812A
公开(公告)日：1996-05-28
申请号：US123314
申请日：1993-09-17
申请人： Gerhard Ryhiner , Kim Sorensen , Bernard Birou
发明人： Gerhard Ryhiner , Kim Sorensen , Bernard Birou
IPC分类号： C02F3/34 , C02F3/10 , C02F3/28 , C02F3/30
CPC分类号： C02F3/302 , C02F3/10 , C02F3/2806 , Y02W10/15 , Y10S210/903
摘要： In the process, water, in which organic carbon, ammonium and nitrate are contained, is biologically purified. In a first reaction vessel (10) forming a denitrifying biofilm reactor the carbon is to a large extent eliminated under partly anoxic, partly aerobic conditions by the use of nitrate-containing oxygen, and molecular oxygen respectively. In a second, ventilated reaction vessel (20) the ammonium is converted at least partially by nitric bacteria into nitrates. Water containing nitrates is recirculated from the second into the first reaction vessel. In the first reaction vessel the water to be treated is conveyed from the top to the bottom via a flooded fixed bed. To supplement a deficiency in nitrate-containing oxygen in the elimination of carbon the fixed bed is ventilated in the base region with a gas which contains a metered amount of molecular oxygen. The process according to the invention is particularly suitable for the purification of waste water having a variable ammonium concentration.
摘要翻译：在此过程中，含有有机碳，铵和硝酸盐的水被生物纯化。在形成反硝化生物膜反应器的第一反应容器（10）中，分别通过使用含硝酸盐的氧和分子氧在很大程度上消除了部分缺氧部分需氧条件下的碳。在第二个通风的反应容器（20）中，铵被硝酸盐至少部分地转化成硝酸盐。含有硝酸盐的水从第二反应容器再循环到第一反应容器中。在第一反应容器中，待处理的水通过淹没的固定床从顶部输送到底部。为了补充含有硝酸盐的氧在消除碳中的缺陷，固定床在碱性区域中通过含有计量量的分子氧的气体通风。根据本发明的方法特别适用于净化具有可变铵浓度的废水。

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