Moisture content
The humidity level was always determined a few hours after the
sorting process, both for the putrescibles, paper-cardboard, textiles
and plastics (which are the most organic materials capable of
evolving during biodegradation), and for the fine and very fine fractions.
The results are presented in Table 1.
The humidity for G1 and G2 are around 4% and 47%, respectively
and the humidity for French waste is about 36%. The difference in
humidity between G1 and G2 was not only due to their composition,
but also to the season, since G1 was sampled during the dry
season and G2 during the rainy season. The humidity of the putrescibles
fractions varied considerably between G1 and G2 (by 11.0%
and 66.9%, respectively). The reuse of green waste and putrescibles
upstream for the G1 deposit could explain this great difference
(Aloueimine, 2006). The difference in proportions of plastic bags,
textiles, paper and cardboard did not correlate with the way of
management. The fine and very fine fractions from G1, with high
proportions of sand and gravel, presented low humidity, which
correlated with the chemical composition of the mostly mineral
fraction. This low humidity could also be explained by the lac