METHOD AND APPARATUS FOR TREATING WASTE WATER

摘要

An object of the present invention is to provide a wastewater treatment process involving solids-liquid separation after biological treatment, in which solids-liquid separation of activated sludge can be more efficiently performed. In order to achieve this object, the present invention provides a wastewater treatment process involving solids-liquid separation of the activated sludge mixed liquor obtained after biologically treating raw wastewater, comprising introducing raw water into a biological reaction tank to biologically treat it, then introducing the activated sludge mixed liquor treated in the biological reaction tank into a solids-liquid separation tank containing a water-permeable filter immersed therein and forming a dynamic filter layer of sludge on the surface of the water-permeable filter to give a filtrate from the water-permeable filter.