bids are invited for servicing and repairing of sewage treatment plant fine screen feed pumps repair , fine bubble diffusers supply and replacement , servicing of auto valves , pressure transmitter service , servicing of permeate pump , servicing of ras pump , mbr air blower repair , anoxic tank cleaning , coarse bar screen supply , oil skimmer motor repair , servicing of aeration air blower , servicing of backwash pump , servicing of hypo dosing pump , equalization tank emptying , plc program modifications , membrane cleaning and service , basket centrifuge repair and service , mechanical bar screen repair and service , installation and commissioning total quantity : 69