Patent ID: 8070954
Filing Date: 2011-12-06
Classification: B01D,C02F,Y02A,Y02W

Abstract:
1. A sea water desalinating method for desalinating sea water by way of filtration using a reverse osmosis membrane device, comprising carrying out a wastewater treatment step of subjecting inorganic wastewater to precipitation and separation to produce sedimentation treated water, filtering the sedimentation treated water by using a clarifier that has at least one of a sand filtration means, a microfiltration membrane and an ultrafiltration membrane to produce permeate, and filtering the permeate using a first reverse osmosis membrane device to produce permeate that is purified water and concentrated water, a mixing step of mixing, as diluent water, the concentrated water into sea water to produce mixed water, and a mixed water treatment step of feeding the mixed water produced by the mixing step to a second reverse osmosis membrane device, at which the mixed water is filtered, thereby desalinating sea water.