Performance and stability of sewage sludge digestion under CO2 enrichment: a pilot study

Show simple item record Alibardi, Luca Green, Kevin Favaro, Lorenzo Vale, Peter Soares, Ana Cartmell, Elise Bajón Fernández, Yadira 2017-09-19T15:51:44Z 2017-09-19T15:51:44Z 2017-08-16
dc.identifier.citation Alibardi L, Green K, Favaro L, Vale P, Soares A, Cartmell E, Fernández YB, Performance and stability of sewage sludge digestion under CO 2 enrichment: a pilot study, Bioresource Technology, Vol. 245, Part A, December 2017, pp. 581-589 en_UK
dc.identifier.issn 0960-8524
dc.description.abstract Carbon dioxide (CO2) injection in anaerobic digestion has recently been proposed as an interesting possibility to boost methane (CH4) recovery from sludge and organic waste by converting a greenhouse gas into a renewable resource. This research assessed the effects of exogenous CO2 injection on performance and process stability of single-phase continuous anaerobic digesters. Two pilot scale reactors treating sewage sludge were operated for 130 days. One reactor was periodically injected with CO2 while the other acted as control. Two injection frequencies and injection devices were tested. The results indicated that CO2 enrichment allowed an increase in CH4 production of ca. 12%, with a CH4 production rate of 371 ± 100 L/(kgVSfed⋅d) and a CH4 concentration of ca. 60% when dissolved CO2 levels inside the test reactor were increased up to 1.9-fold. Results also indicated an improvement in process resilience to temporary overloads and no impacts on stability parameters. en_UK
dc.language.iso en en_UK
dc.publisher Elsevier en_UK
dc.rights Attribution-NonCommercial-NoDerivatives 4.0 International
dc.subject Anaerobic digestion en_UK
dc.subject Carbon dioxide utilisation en_UK
dc.subject Sewage sludge en_UK
dc.subject Pilot scale en_UK
dc.subject Process stability en_UK
dc.title Performance and stability of sewage sludge digestion under CO2 enrichment: a pilot study en_UK
dc.type Article en_UK

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