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Performance of mixing ratios on the volume of biogas in a batch reactor

Author Affiliations

  • 1Department of Civil Engineering, College of Engineering, Misan University, Iraq
  • 2Department Chemical Sciences, College of Sciences, Misan University, Iraq

Res. J. Engineering Sci., Volume 8, Issue (2), Pages 1-9, May,26 (2019)


Sustainable technologies to reduce and eliminate biological waste into a useful form of energy is anaerobic therapy (ADBut anaerobic digestion has some drawbacks in the case of the mono-system (mono-digestion); therefore, it is preferable to use the participation in digestion (ACoD) of different wastes to improve the performance of digestion of wastes. In this study, the work was divided into two stages, the first stage included anaerobic co-digestion of food waste and sewage at different ratios based on weight while the second stage was performed based on the best mixing ratios in the first stage based on volume. Moreover, a batch reactor was utilized for co-fermentation under mesophilic temperature with hydraulic retention times 21 days for each stage. The results indicated that the pure food waste and co-substrates with higher food waste content increased biogas production compared to sludge digestion in both stages. Furthermore, the biogas yield increased at ratios (1:0, 7:3) (FW > SS) compared to mono sludge (low organic content), also all parameters value has found have a positive effect compared with mono sludge.


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