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Performances comparison between laboratory and full-scale anaerobic digesters treating a mixture of primary and waste activated sludge

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  • Bouallagui, H.
  • Marouani, L.
  • Hamdi, M.

Abstract

Laboratory-scale semi-continuously digesters were used as test platforms to evaluate a full-scale application of anaerobic co-digestion of primary sludge (PS) and activated sludge (AS) in Tunisia. Effects of the PS:AS ratio and the organic loading rate (OLR) on digester performances were examined at a hydraulic retention time (HRT) of 20d. Increasing PS proportion in the feedstock significantly improved the biogas production yield. The digester that was fed with a PS:AS ratio of 80:20 showed the highest total volatile solids (TVS) removal efficiency and specific biogas production (SBP) of 72.1% and 0.6Lg−1 TVS added, respectively. However, the digester that was fed with a PS:AS ratio of 20:80 as the full-scale fed stock showed 51% and 0.38Lg−1 TVS added of TVS removal and SBP, respectively. The full-scale digester showed a biogas production rate up to 11,000–12,000m3d−1 with a SBP of 0.31Lg−1 TVS added. The comparison between the two scale results demonstrates that lab-scale experiments with real substrates and close to reality digestion conditions can serve to predict the digestion capability of the full-scale digester.

Suggested Citation

  • Bouallagui, H. & Marouani, L. & Hamdi, M., 2010. "Performances comparison between laboratory and full-scale anaerobic digesters treating a mixture of primary and waste activated sludge," Resources, Conservation & Recycling, Elsevier, vol. 55(1), pages 29-33.
    • Handle: RePEc:eee:recore:v:55:y:2010:i:1:p:29-33
    DOI: 10.1016/j.resconrec.2010.06.012
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    References listed on IDEAS

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    1. Sharma, V. K. & Testa, C. & Lastella, G. & Cornacchia, G. & Comparato, M. P., 2000. "Inclined-plug-flow type reactor for anaerobic digestion of semi-solid waste," Applied Energy, Elsevier, vol. 65(1-4), pages 173-185, April.
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    Cited by:

    1. Abelleira, J. & Pérez-Elvira, S.I. & Sánchez-Oneto, J. & Portela, J.R. & Nebot, E., 2012. "Advanced Thermal Hydrolysis of secondary sewage sludge: A novel process combining thermal hydrolysis and hydrogen peroxide addition," Resources, Conservation & Recycling, Elsevier, vol. 59(C), pages 52-57.

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