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缺氧生物膜反应器采用好氧预挂膜与快速排泥挂膜方法，在挂膜期间加强污泥回流，缩短反应器的启动时间。两种反应器内均存在呈悬浮与附着形态的污泥。“,”The anoxic biofilm reactor has a short start-up period by employing the method of aerobic precoating of the b-iomedium combined with rapid draw-off sludge.During this period,the sludge is recycled.In the anoxic-aerobic biofilm reactor,there are both suspended and attached sludge.