Framework agreement for the purchase of aluminium coagulants

The Agency for Water and Sewerage Works (VAV) needs to enter into a framework agreement for the procurement of aluminium coagulants to remove phosphor in the event of large amounts of water to the plant, as well as to remove undesired microorganisms in the biological site part as needed. The need for coagulants varies greatly from year to year depending on the annual rainfall. The average need is estimated to be 500 tonnes per annum.