REVERSE OSMOSIS SYSTEM AND METHOD WITH BLENDING OF FEED AND PERMEATE TO ADJUST TOTAL DISSOLVED SOLIDS CONTENT

摘要

Some embodiments of the invention provide a reverse osmosis water filtration system (20) including a housing (40), a pre-filter cartridge (26), a reverse osmosis cartridge (30), and a post treatment cartridge (28). A medial water line (74) transports a first portion of pretreated water from the pre-filter cartridge to the reverse osmosis cartridge. An unfiltered water line (80) includes a flow restrictor (82) and blend valve (60). The unfiltered water line is fluidly coupled between the medial water line and a blend water line. The blend water line receives filtered water at a first flowrate from the reverse osmosis cartridge and unfiltered water at a second flowrate from the blend valve. The first flowrate and the second flowrate are substantially equal to produce a consistent total dissolved solids value.