RO reject water recover

we have DM plant and for that we used TWO stage RO for Dm feed that second stage RO reject water is around 180 kl/day  and that water we want to recover and reject water analysis as below   PH                  =8.11 TDS                =5922 TDS. EVPO.  =9200 TH                  =1928 CAH               =924 MGH              =1004 ALKP             =110 ALKM            =1240 CL                  =3556 SO4               =4626 FE                  =52.8 SIO2              =137 PO4               =12 please any body suggest us how to recover this water and reduce this quantity.