and O2 concentrations were detected after two weeks of composting
most likely because of the important dilution although the airflow
was decreased during the cooling phase. A wide range of
aeration rates leads to successful composting and after preliminary
tests, the used aeration rates were halfway between the optimal
aeration rate of 120 l h1 kg1 DM, proposed by Yamada and Kawase
(2006) and the optimal range of 8.5–16.6 l h1 kg1 DM, proposed
by de Guardia et al. (2008) during the composting of
sludge with bulking agents.