... on reverse osmosis,with filter and softener,add mixed bed,EDI to high desalinization ratio,PLC programmable controller The ... osmosis (RO),Electrodeionization(EDI),Ultraviolet sterilization (UV),Polishing mixed bed(MB),Terminal micro filter (MF). The pretreatment part is ... base, thereby can products high quality water continuously.Mixed bed refers to taking negative resin and positive resin into ...