Design, Supply, Transportation, Construction, Installation, Testing, And Commissioning Of A 2.50 Mld Capacity Sewage Treatment Plant At Mangaldoi Municipality On A Design, Build, And Operate Basis In Extended Aeration With Sewage Pumping Station Design, Supply, Transportation, Construction, Installation, Testing, And Commissioning Of A 2.50 Mld Capacity Sewage Treatment Plant At Mangaldoi Municipality As Well As Operation And Maintenance Of The Complete System For A Period Of Five Years Aft