A continuous-flow approach for the development of an anaerobic consortium capable of an effective biomethanization of a mechanically sorted organic fraction of municipal solid waste as the sole substrate

Bertin, Lorenzo; Bettini, Cristina; Zanaroli, Giulio; Frascari, Dario; Fava, Fabio

doi:10.1016/j.watres.2011.11.001

Cited by 10 publications

(2 citation statements)

References 29 publications

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“…Recently, a study dedicated to the selection and acclimation of an effective methanogenic consortium in the biomethanization of MS‐OFMSW was carried out by continuously feeding an identically developed reactor with the same experimental matrix employed in the present research 26. Even though encouraging results have been obtained, lower biomethane yields and COD removals were achieved both as a result of a first 3‐months run (0.15 L g −1 and 84%, respectively), carried out by initially filling the reactor with cattle manure (such as in this study), and of a second run, carried out under steady state conditions after a further batch period (0.25 L g −1 and 89%, respectively) 26. This evidence suggests that the semicontinuous approach proposed in this research allowed better acclimation of the selected anaerobic consortium.…”

Section: Discussionmentioning

confidence: 99%

Acclimation of an anaerobic consortium capable of effective biomethanization of mechanically‐sorted organic fraction of municipal solid waste through a semi‐continuous enrichment procedure

Bertin

Bettini

Zanaroli

et al. 2012

J of Chemical Tech & Biotech

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BACKGROUND: Municipal solid waste is generally disposed of by incineration or landfilling. Higher combustion efficiencies or lower waste amounts to be dumped, respectively, can be obtained through recovery of the waste wet fraction, which could be valorized by means of anaerobic digestion processes with the production of a CH4‐rich biogas. However, such a fraction is typically poorly digestible. The aim of this work was to obtain a methanogenic consortium capable of effective biomethanization of the wet fraction collected from a municipal solid waste. RESULTS: An up‐flow recirculated column bioreactor (0.36 L) was initially filled with cattle manure and then, after a short batch working period, fed with the above mentioned target substrate according to a semicontinuous scheme. More than 90% of the overall COD fed during the whole 5‐months experiment was depleted. The methane production yield gradually increased throughout the process to 0.35 L g−1 of depleted COD. Molecular analysis of the microbial consortium indicated that the archaeal population, which consisted of two acetoclastic Methanosarcina sp. strains, persisted during the whole experiment, whereas several hydrolytic and acidogenic Firmicutes and Bacteroidetes were enriched throughout the process, concomitantly to the increase of the biomethanization potential of the consortium. CONCLUSIONS: An anaerobic consortium capable of efficiently converting the wet fraction of municipal solid waste into methane was obtained through a dedicated enrichment procedure in an up‐flow anaerobic recirculated reactor. This result was mainly ascribed to the acclimation and enrichment of bacterial species. Copyright © 2012 Society of Chemical Industry

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Section: Discussionmentioning

confidence: 99%

Acclimation of an anaerobic consortium capable of effective biomethanization of mechanically‐sorted organic fraction of municipal solid waste through a semi‐continuous enrichment procedure

Bertin

Bettini

Zanaroli

et al. 2012

J of Chemical Tech & Biotech

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“…This spare capacity can be exploited for the anaerobic co‐digestion (co‐AD) process 13,14 . In particular, the co‐AD of SwS with the organic fraction of municipal solid waste is finding increasing amounts of applications 15–18 …”

Section: Introductionmentioning

confidence: 99%

Development of a continuous‐flow anaerobic co‐digestion process of olive mill wastewater and municipal sewage sludge

Bovina

Frascari

Ragini

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUNDOlive mill wastewater (OMW) represents an environmental problem due to its high organic load and relevant concentration of phenolic compounds (PCs). OMW treatment and disposal represents a relevant challenge and cost for olive mills and multi‐utilities in charge of waste management in Mediterranean countries. The goal of this study was to develop an anaerobic co‐digestion (co‐AD) process of OMW and sewage sludge (SwS) from municipal wastewater treatment.RESULTSDifferent volumetric OMW:SwS ratios up to 100% OMW were fed in continuous 1.7‐L bioreactors. The reactors fed with raw OMW (rOMW) performed better than those fed with OMW dephenolized by adsorption (dOMW). At a 23‐day hydraulic retention time, the best performances were obtained in the reactor fed with 25% rOMW, with a 105% increase in methane yield in comparison to the 100% SwS test. At a 40‐day hydraulic retention time, the reactor fed with 40% rOMW attained a 268 NLCH4/kgvolatile solids methane yield. The conversion of phenolic compoundsreached 70% when the hydraulic retention time was increased from 23 to 40 days. A cost–benefit analysis indicated that both rOMW co‐AD in existing digesters and phenolic compounds recovery from OMW followed by co‐AD of dOMW can lead to relevant additional revenues for the multi‐utilities in charge of wastewater management.CONCLUSIONThis work proves that, using the existing network of SwS anaerobic digesters, it is feasible to co‐digest the entire OMW production in regions characterized by intense olive oil production, thus attaining a relevant increase in methane production yield (a 144% increase in comparison to 100% SwS). © 2020 Society of Chemical Industry (SCI)

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Bio-Methane Production from Wastes: Focus on Feedstock Sources and Microbial Communities

Chiarini

Tabacchioni

2015

Microbial Factories

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A continuous-flow approach for the development of an anaerobic consortium capable of an effective biomethanization of a mechanically sorted organic fraction of municipal solid waste as the sole substrate

Cited by 10 publications

References 29 publications

Acclimation of an anaerobic consortium capable of effective biomethanization of mechanically‐sorted organic fraction of municipal solid waste through a semi‐continuous enrichment procedure

Acclimation of an anaerobic consortium capable of effective biomethanization of mechanically‐sorted organic fraction of municipal solid waste through a semi‐continuous enrichment procedure

Development of a continuous‐flow anaerobic co‐digestion process of olive mill wastewater and municipal sewage sludge

Bio-Methane Production from Wastes: Focus on Feedstock Sources and Microbial Communities

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