Patent ID: 8083948
Filing Date: 2011-12-27
Classification: B01D,C02F,Y02A,Y02W

Abstract:
1. A fresh water generating apparatus comprising a first treatment part that separates low salt concentration wastewater having a salt concentration lower than sea water into permeate and concentrated water by way of reverse osmosis membrane filtration, and a second treatment part that mixes, as diluent water, the concentrated water produced at the first treatment part into sea water to produce mixed water and separates the mixed water into permeate and concentrated water by way of reverse osmosis membrane filtration, thereby producing permeate as fresh water separated respectively at the first and second treatment parts, wherein the first treatment part includes a flow rate measurement means for measuring the inflow rate of the low salt concentration wastewater flowed into the first treatment part, such that the filtration rate at the first treatment part and the filtration rate at the second treatment part are controlled based on the measured value by the flow rate measurement means.