2.2.1.1. Reactor preparation. The reactors were made by loading
locally available polyvinyl chloride pipe (PVC) with 9.42 kg of
unshredded solid waste. A 0.05 m layer of gravel with a nominal
diameter ranging from 12 to 20 mm was placed at the bottom of
the bioreactor and then a circular nylon screen was placed on the
gravel layer as the basement to prevent clogging of the reactor. A
0.15 m deep layer of locally available black cotton was placed on
both the top of the gravel and waste layers as a cover and further to
provide even distribution of the recirculated leachate. Finally, the
bioreactor cell cover was placed on top and the whole unit was
sealed.