Reverse osmosis filtration system with concentrate recycling controlled by upstream conductivity

摘要: A filtration system comprising a reverse osmosis unit having an inlet thereto, permeate outlet and concentrate wherein first conduit extends from source upstream of the to liquid inlet, second flow control mechanism controls amount third fourth conduits, being connected while conductivity sensor on is mounted downstream point where connects conduit, amounts which are directed conduits in accordance with liquid. The arrangement allows one approximate measure total dissolved solid thereby maximize efficiency avoid unnecessary dumping drain.