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1. 发明授权

US06517723B1 Method and apparatus for treating wastewater using membrane filters 有权
标题翻译：使用膜过滤器处理废水的方法和设备
公开(公告)号：US06517723B1
公开(公告)日：2003-02-11
申请号：US09626879
申请日：2000-07-27
申请人： Glen T. Daigger , Albert M. Wollmann , Sudhir N. Murthy , Edwin J. Fleischer , Thomas A. Broderick
发明人： Glen T. Daigger , Albert M. Wollmann , Sudhir N. Murthy , Edwin J. Fleischer , Thomas A. Broderick
IPC分类号： C02F300
CPC分类号： C02F3/30 , C02F1/283 , C02F3/006 , C02F3/12 , C02F3/121 , C02F3/1226 , C02F3/1273 , C02F3/308 , C02F2209/22 , Y02W10/15
摘要： An apparatus using activated sludge for the removal of biological nutrients from a wastewater includes a bioreactor for containing a mixture of wastewater under treatment and activated sludge. The bioreactor is divided into a plurality of serially connected treatment zones and includes a wastewater inlet, a downstream aerobic zone and an upstream aerobic zone between the wastewater inlet and the downstream aerobic zone. A membrane filter is provided in the downstream aerobic zone so that it functions as an immersed membrane filter with a bioreactor containing an operative volume of wastewater and activated sludge. The immersed membrane filter filters treated water flowing from the bioreactor through a first outlet. An aerator is operative associated with the membrane filter for purging solids from the membrane filter. A second outlet in the downstream aerobic zone is connected to an inlet in the upstream aerobic zone for recycling activated sludge charged with oxygen from the downstream aerobic zone to the upstream aerobic zone. A method for removal of nutrients from a wastewater includes providing a wastewater to an inlet of a serial, multi-zone, activated sludge bioreactor containing an activated sludge. The bioreactor has a downstream aerobic zone from which water is removed and an upstream aerobic zone between the wastewater inlet and the downstream aerobic zone. Treated water is filtered from the activated sludge in the downstream aerobic zone through an immersed membrane filter. Solids are purged from the immersed membrane filter with an oxygen containing gas and return activated sludge charged with oxygen is recycled from the downstream to the upstream aerobic zone or to an upstream deaeriation zone.
摘要翻译：使用活性污泥从废水中除去生物营养物质的装置包括用于含有处理废水和活性污泥的混合物的生物反应器。生物反应器分为多个串联连接的处理区，包括废水入口，下游需氧区和污水入口与下游好氧区之间的上游好氧区。在下游需氧区域设置膜过滤器，使其作为具有生物反应器的浸入式膜过滤器，该生物反应器含有操作体积的废水和活性污泥。浸入的膜过滤器将处理过的水从生物反应器中流过第一个出口。与膜过滤器相关联的曝气器用于从膜过滤器中吹扫固体。下游好氧区中的第二出口连接到上游好氧区的入口，用于将从下游好氧区充满氧的活性污泥再循环到上游好氧区。一种从废水中去除营养物质的方法包括提供废水含有活性污泥的连续多区活性污泥生物反应器的入口。生物反应器具有下游需氧区域，水从其中除去，并且在废水入口和下游需氧区之间的上游好氧区。处理水通过浸没的膜过滤器从下游好氧区的活性污泥中过滤。用含氧气体从浸没的膜过滤器中清除固体，并将返回的充满氧气的活性污泥从下游循环到上游好氧区或上游脱气区。

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