Idroengineering has gained a great experience in the field of waste water depuration, serving several kinds of civil customers. Biological depuration plants are realized with the most advanced and experimented technologies with:

- active muds processes
- adhered biomasses processes,
- SBR (sequencing batch reactor),
- Anaerobic processes
- Denitrification, defosforation, oxidation and nitrification, mud stabilization phases

Plants are developed following a propetary project or an executive project already set by the customer.