Improvement of energy recovery from the digestion of waste activated sludge (WAS) through intermediate treatments: The effect of the hydraulic retention time (HRT) of the first-stage digestion

Barbara Ruffino, Alberto Cerutti, Giuseppe Campo, Gerardo Scibilia, Eugenio Lorenzi and Mariachiara Zanetti

Applied Energy, 2019, vol. 240, issue C, 204 pages

Abstract: Reduced biodegradability of waste activated sludge (WAS) limits the production of methane and the consequent energy recovery in an anaerobic digestion (AD) process. Pre-treatments are a solution to increase the biodegradability of bacteria cell biomass, but a large part of poorly degradable organic matter is left after digestion. The utilization of intermediate hydrolysis treatments (IHTs) may help in converting even the most recalcitrant parts of organic matter in methane.

Keywords: Intermediate hydrolysis treatments; Two-stage digestion; Energy balance; Economic sustainability; Digestate (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (5)

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DOI: 10.1016/j.apenergy.2019.02.061

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