Abstract
Forward osmosis(FO) is recently paied attention to preprocessing of the Reverse Osmosis(RO). It can reduce the input power of RO plant. It is required to do lower the salt concentration at outlet and higher the permeation flow rate for the supply flow rate. The characteristics of the flow and osmosis are studied for the hollow fiber membrane module that used in RO system. It is cleared in the membrane module with experiments that permeation flow rate is increased and the salt concentration at outlet is decreased with the lower salt water flow rate. The salt concentration distribution in the module becomes uniform with higher salt water flow rate. We proposed the parameter for evaluation of the FO performance. By this parameter, the FO performance is high at the low salt water flow rate.
