Biogas Production from Adrar City Lagoon Station's Sludge

Abstract

This research focuses on the experimental study of the anaerobic digestion of the sludge lagoon resort of Adrar city (South of Algeria). In particular, it studies the behavior of organic matters contained in the sludge under mesophilic condition, in order to clean up and stabilize them biologically, thereafter to valorize them in the form of a renewable energy, and fertilizer matters as well that could be exploited by farmers. It is worth mentioning that the latter is even more important since the Saharan agricultural soils are skeletal, salted and poor in organic matter. Indeed, this study shows that these mixtures consist mainly of biodegradable organic matter, making them most suitable for anaerobic digestion. The results obtained, through the recorded pH values and the collected biogas volume, clearly indicate a smooth digestion, which helped secure a volume of biogas (477 ml). Also, the results show a reduction of COD and BOD5 with a yield of 28.53 % and 42.85 % respectively. In addition, the results obtained in the complete seeding show an improvement of the production of biogas (double compared to the unseeded), and in the reduction of the COD and BOD5 with of a yield 50 % and 66.66 % respectively.