A continuous flow reactor or method promotes aerobic granule formation. The reactor may comprise three or four zones that may comprise one or more of an aerobic zone, an alternately aerobic and anoxic zone or discrete aerobic and anoxic zones, and a settling zone. The reactor may have a single sludge removal flow. An anaerobic zone may be located at the bottom of a mass of settled granules. Feed may be introduced through the settled granules generally in a plug flow. An aerobic/anoxic zone may be structured or operated partially like a continuously stirred tank reactor (CSTR) but with aeration varying in space or time. Sludge granules may move intermittently from an aerobic zone to an aerobic/anoxic zone, for example by an air lift pump. A settling zone may have an upflow of 4 m/hr or 5 m/hr and wash off flocculated biomass.
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机译:连续流反应器或方法促进需氧颗粒的形成。反应器可以包括三个或四个区域,其可以包括一个或多个需氧区,交替的需氧和缺氧区或离散的需氧和缺氧区以及沉降区。反应器可以具有单个污泥去除流。厌氧区可以位于大量沉降颗粒的底部。饲料通常可以通过活塞流通过沉降的颗粒引入。好氧/缺氧区域可以像连续搅拌釜式反应器(CSTR)一样结构化或部分操作,但曝气的空间或时间有所不同。污泥颗粒可以例如通过空气提升泵从需氧区间歇地移至需氧/缺氧区。沉降区的上游流量可能> 4 m / hr或> 5 m / hr,并洗去絮凝的生物质。
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