Abstract—We are interested in carrying out the process called
anaerobic digestion of two different substrates: the
biodegradable waste from landfill and sludge from the
wastewater treatment plant by natural lagoon. The experiment
is performed in a digester with a capacity one liter, sealed. To
optimize the degradation of organic matter, we followed the
evolution of the degradation of organic matter by measuring the
CDO, the volume of biogas formed during the digestion, the
temperature and the pH of the process. We found that the sludge
off the wastewater treatment plant by natural lagoon is very
rich in fermentable and biodegradable organic material than the
proportion of fermentable material of the landfill. The biogas
formed is flammable, so very rich in methane