bids are invited for new air blowers , raw sewage pump , filter feed pump stp , filter feed pump etp , sludge recirculation pump , treated water transfer pump , etp feed pump , multi grade filter stp , activated carbon filter , multi grade filter etp , activated carbon filter etp , dosing pump etp and stp , suldge tranfer pumps , filter press , mbbr media stp and etp , tube duck media stp and etp , bar screen , allpumps electric wire , electric panel etp and stp , fine bubble diffusers , all butterfly valve , alltank cleaning , flow meter , complete piping , necessary civil work , operation and maintenanceincluding all required chemicals and manpowerfor one year from the date of installation total quantity : 63