Object: Electronic Auction - Hiring A Company To Supply 300,000 Kg (Three Hundred Thousand Kilos) Of Calcium Nitrate In Solution, With The Supply Of Metering Pumps, Storage Tank With Level Sensor And Gas Monitoring Station, To Minimize And Eliminate Bad Odors In Sewage Treatment Stations, Pumps And Collection Networks, In Compliance With The Sanitary Sewage System Board, In Accordance With The Conditions, Quantities And Requirements Established In The Tr.