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

H. Bouallagui, L. Marouani and M. Hamdi

Resources, Conservation & Recycling, 2010, vol. 55, issue 1, 29-33

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.

Keywords: Primary sludge; Waste activated sludge; Stabilisation; Biogas; Laboratory-scale; Full-scale (search for similar items in EconPapers)
Date: 2010
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:recore:v:55:y:2010:i:1:p:29-33

DOI: 10.1016/j.resconrec.2010.06.012

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