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HS-Vesi is investing approximately EUR 10 million to upgrade and expand the Paroinen wastewater treatment plant in Hämeenlinna, Finland, including enhanced nitrogen removal and a new hygienization unit.
“HS-Vesi investoi jätevesien puhdistukseen noin kymmenen miljoonaa euroa.”yle.fi
Summarized from public sources; check the original articles before acting on it.