http://www.housewaterfiltersystem.com/ Water filters remove things that are harmful to your health, things that can increase the chance of getting cancer, and things that taste or smell bad. The physics of filters is based on sieving, ion exchanges and other processes. Pur and Brita are two well known brands. Today, whole house water filters are available aswell as portable and refrigerator systems. http://www.housewaterfiltersystem.com//?article=20120206-81 In July 2002, Singapore announced that a process named NEWater would be a significant part of its future water plans. It involves using reverse osmosis to treat domestic wastewater before discharging the NEWater back into the reservoirs. In the United States, household drinking water filtration sys [read more online] http://www.housewaterfiltersystem.com//?article=20120206-82 Other than desalination, reverse osmosis is a more economical unit opearation for concentrating food liquids i.e. fruit juices. Researches are done on concentration of orange juice and tomato juice. Its advantages including a low operating cost and not involving heat processes, which makes it suitab [read more online]