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

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dc.contributor.authorAlibardi, Luca
dc.contributor.authorGreen, Kevin
dc.contributor.authorFavaro, Lorenzo
dc.contributor.authorVale, Peter
dc.contributor.authorSoares, Ana
dc.contributor.authorCartmell, Elise
dc.contributor.authorBajón Fernández, Yadira
dc.date.accessioned2017-09-19T15:51:44Z
dc.date.available2017-09-19T15:51:44Z
dc.date.issued2017-08-16
dc.description.abstractCarbon 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.identifier.citationAlibardi 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. 581-589en_UK
dc.identifier.issn0960-8524
dc.identifier.urihttp://dx.doi.org/10.1016/j.biortech.2017.08.071
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/12515
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectAnaerobic digestionen_UK
dc.subjectCarbon dioxide utilisationen_UK
dc.subjectSewage sludgeen_UK
dc.subjectPilot scaleen_UK
dc.subjectProcess stabilityen_UK
dc.titlePerformance and stability of sewage sludge digestion under CO2 enrichment: a pilot studyen_UK
dc.typeArticleen_UK

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