Glossary
Odourous emissions from anaerobic digestion

Odor concentration; Concentration d'odeur

Number of European odor units in a cubic meter of gas under standardized conditions, obtained by sensory measurement; expressed in u.o_E/m³.

Physico-chemical concentration; Concentration physico-chimique

Quantification (in mass or mole) of chemical compounds obtained by instrumental measurement, expressed in mg/m³, µg/m³, ppm, ppb, etc.

Seuil de perception; Perceptual threshold

This is a theoretical concept in psychophysics which defines the limit below which an individual can no longer detect stimulation. This threshold can only be determined probabilistically.

Géographie physique; Physical geography

The branch of geography that studies the natural environment.

Sludge dryness ; Siccité des boues

Mass percentage of dry matter. Dryness is measured by the...