Composting-methanization of solid urban bio-waste from the municipality of Chlef (Algeria)

Authors

  • TAHRAOUI DOUMA Naïma Laboratories: Water and Environment, Hassiba Benbouali University, Chlef. BP 151 Hay Essalam 02000 Chlef, Algeria. Center de ressources technologiques pour l'environnement (ODESSOL), Ecole Nationale Supérieure des Ingénieurs de Limoges (ENSIL. 16 rue Atlantis Parc ESTER Technopole 87068 Limoges, France.
  • CHAOUTI Nacéra Laboratories: Water and Environment, Hassiba Benbouali University, Chlef. BP 151 Hay Essalam 02000 Chlef, Algeria. Center de ressources technologiques pour l'environnement (ODESSOL), Ecole Nationale Supérieure des Ingénieurs de Limoges (ENSIL. 16 rue Atlantis Parc ESTER Technopole 87068 Limoges, France.
  • FELLOUH Amina Laboratories: Water and Environment, Hassiba Benbouali University, Chlef. BP 151 Hay Essalam 02000 Chlef, Algeria. Center de ressources technologiques pour l'environnement (ODESSOL), Ecole Nationale Supérieure des Ingénieurs de Limoges (ENSIL. 16 rue Atlantis Parc ESTER Technopole 87068 Limoges, France.
  • CHAMBON Serge Laboratories: Water and Environment, Hassiba Benbouali University, Chlef. BP 151 Hay Essalam 02000 Chlef, Algeria. Center de ressources technologiques pour l'environnement (ODESSOL), Ecole Nationale Supérieure des Ingénieurs de Limoges (ENSIL. 16 rue Atlantis Parc ESTER Technopole 87068 Limoges, France.

Abstract

In Chlef, the management of urban solid bio-waste is limited to "all in controlled landfill or in wild landfill". This bio-waste can be treated by composting-methanization. With this in mind, two temperature regimes were chosen, the mesophilic regime (35°C) and the thermophilic regime (55°C). The choice of a neutral pH is an optimal value indicating the stability and the good progress of the anaerobic digestion. As well as monitoring the parameters of the composting process. The results of the composting process show that the values of temperature (35°C to 62°C), pH (5 to 8), moisture content (60% and 40%) and percentage of organic matter (74% to 41%) indicate that the fermentation process is going well. The composting process enters the cooling phase after 60th day of fermentation. While the results of the methanization show that a substrate with an organic matter content of 73% causes an accumulation of acids in the digester and a stop of the reaction in mesophilic conditions. Therefore, the thermophilic mode is more suitable for the anaerobic degradation of raw bio-waste. The tests were conclusive in obtaining a flammable biogas. The values of the VFA (Volatile Fatty Acid)/ACT (Alkalimetric Title) ratios below 0.1 show the good functioning of the anaerobic digestion. The methanization of two masses of substrate at the beginning and during the cooling phase of composting allows a gain in residence time, thus a lower energy cost.

Volume_15_Issue_2_June_2023

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Published

07/06/2023

How to Cite

Naïma , T. D., Nacéra, C., Amina, F., & Serge, C. (2023). Composting-methanization of solid urban bio-waste from the municipality of Chlef (Algeria). Revue Nature Et Technologie, 15(2), 17–30. Retrieved from https://journals.univ-chlef.dz/index.php/natec/article/view/152

Issue

Vol. 15 No. 2 (2023)

Section

Fundamental & Engineering Sciences

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