Electronic Public Open Competition Of Communication Nens Underneath Limits With No. 9971/07.07.2025 For The Needs Of The Project Entitled "A Holistic Approach Towards Onsite Hospital Wastewater Treatment (Project Number: 101113941)/Life22-Env-El-Hippocrates (Project Code: 81039), Indoor Budget € € € 28.628.70 Not Including Vat (€ 35.487.85 Including Vat)