Design, Supply, Transportation, Construction, Installation, Testing, And Commissioning Of A 1.50 Mld Capacity Sewage Treatment Plant At Rangia Municipality On A Design, Build, And Operate Basis In Activated Sludge Process Design, Supply, Transportation, Construction, Installation, Testing, And Commissioning Of A 1.50 Mld Capacity Sewage Treatment Plant At Rangia Municipality As Well As Operation And Maintenance Of The Complete System For A Period Of Five Years After