Patent ID: 6379548
Filing Date: 2002-04-30
Classification: B01D,C02F,Y02W,Y10S

Abstract:
In a system for concentrating acid-alkali effluent water containing organic matter by reverse osmosis, evaporating the resulting concentrated water to dryness and collecting the water permeating through a reverse osmosis membrane, an effluent water reclamation apparatus comprises as arranged upstream from a reverse osmosis device a neutralizing device for neutralizing the effluent water to prevent a scale component from separating out from the effluent water in the process of reverse osmosis, and a biological treatment tank for biologically treating the neutralized effluent water, the biological treatment tank using a fluidized-bed biological activated carbon process, wherein the biological treatment tank is provided in its interior with a microfiltration membrane for separating an SS component from the treated water, said microfiltration membrane being a flat membrane shaped to hold spacers between membrane portions so that the water to be treated is positioned outside the membrane.