Temporal variation of decomposition gases from baled municipal solid wastes

► Nine cylindrical bales having a mix of different waste materials were constructed. ► An aerobic decomposition took place as soon as the bales were formed. ► CO2 exhibited a rapid increase in the first few days of baling. ► There was no significant anaerobic decomposition over 10 months. ► The content of the bales become less important after a certain period of time.