Comparative analysis of the thermal hydrolysis integration within WWTPs as a pre-, inter- or post-treatment for anaerobic digestion of sludge

D. Fernández-Polanco, E. Aagesen, M. Fdz-Polanco and S.I. Pérez-Elvira

Energy, 2021, vol. 223, issue C

Abstract: Anaerobic digestion (AD) is the most widely applied technology for the treatment of sludge produced in WWTPs. At present, thermal hydrolysis (TH) is becoming the technology of choice to improve anaerobic digestion due to its techno-economic advantages. The drivers behind the decision to install this technology, however, differ widely as they depend on local legislation and prevailing pricing structure. Thermal hydrolysis can be applied with different objectives (increase biogas yield, reduce digestion volume, reduce digestate quantity, pathogens removal) that can result in different optimum configurations. In this context, the same TH process can be placed as pre-, inter- and post-treatment to AD, each with distinct advantages and drawbacks.

Keywords: Sludge; Anaerobic digestion; Thermal hydrolysis; Energy balance; Economics (search for similar items in EconPapers)
Date: 2021
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:223:y:2021:i:c:s0360544221002905

DOI: 10.1016/j.energy.2021.120041

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