Glossary

BOD

Biological oxygen demand. The amount of oxygen used by bacteria in biodegradation. Biodegradability is measured as the ratio of BOD to COD.

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International Campaign Days

Global Handwashing Day 2024

A motif of hand washing icons and the world, with the title Global Handwashing Day

This year's theme for Global Handwashing Day, "Why are clean hands still important?", emphasizes the role of hand hygiene in preventing infections. Washing, caring, protecting and disinfecting are the components of successful hand hygiene. Find out more about the right hand hygiene in everyday and healthcare settings.