The tender benefits from financing under EU's operational programme Environment 2014-2020, the municipality said in a tender notice.
Works on the project, expected to be wrapped up within a period of 430 days, also include project design and construction supervision as well as the supply of the necessary equipment, the notice showed.
Candidates have until May 10 to submit their bids. Price and quality criteria will carry equal weights in the overall ranking of the offers.
(1 euro = 1.95583 levs)