Grease trap waste valorization through hydrothermal liquefaction and anaerobic digestion: a circular approach to dairy wastewater treatment

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dc.catalogadorpva
dc.contributor.authorCabrera Abarca, Daniela Viviana
dc.contributor.authorAdema Yusta, Ingrid Paz
dc.contributor.authorSantibañez Prado, María José
dc.contributor.authorCelis, Crispin
dc.contributor.authorTester, Jefferson W.
dc.contributor.authorLabatut, Rodrigo
dc.date.accessioned2025-01-20T16:05:18Z
dc.date.available2025-01-20T16:05:18Z
dc.date.issued2024
dc.description.abstractGrease traps are commonly used in the dairy industry to separate fats from their generated wastewater. Due to its properties, grease trap waste (GTW) is predominantly incinerated or landfilled despite its high energy content. In this study, hydrothermal liquefaction (HTL) was used to convert dairy industry GTW into biocrude while the generated HTL-wastewater (AP) was subjected to anaerobic digestion (AD) to recover biomethane. To maximize organic carbon to biocrude conversion, and to minimize the use of freshwater, a fraction of the AP was recirculated in subsequent HTL reactions. AP recirculation increased biocrude yields (73 vs. 78 wt%) but decreased both the higher heating value (HHV) (38 vs. 37 MJ kg−1) and the fraction (72 vs. 64%) of lighter hydrocarbons. Continuous AD using an EGSB reactor proved to be an effective method to further reduce the COD of the AP from 6.5 g L−1 to 0.7 g L−1 and enhance the overall energy recovery of the GTW from 81% (HTL only) to 83.1% (HTL-AD). Integrating HTL with AD and recycling a fraction of the AP in the HTL process allows for efficient wastewater treatment and a recovery of up to 84.8% of the energy contained in the GTW.
dc.description.funderFondo Nacional de Desarrollo Cientfico y Tecnolgico
dc.format.extent16 páginas
dc.fuente.origenSRIA
dc.identifier.doi10.1039/d4ee02245a
dc.identifier.eissn1754-5706
dc.identifier.issn1754-5692
dc.identifier.scopusidSCOPUS_ID:85207279854
dc.identifier.urihttps://doi.org/10.1039/d4ee02245a
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/89889
dc.identifier.wosidWOS:001339119600001
dc.information.autorucEscuela de Ingeniería; Cabrera Abarca, Daniela Viviana; S/I; 141658
dc.information.autorucEscuela de Ingeniería; Adema Yusta, Ingrid Paz; S/I; 1026780
dc.information.autorucEscuela de Ingeniería; Santibañez Prado, María José; S/I; 1065086
dc.information.autorucEscuela de Ingeniería; Labatut, Rodrigo; S/I; 1025235
dc.issue.numero22
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final8941
dc.pagina.inicio8926
dc.publisherRoyal Society of Chemistry
dc.revistaEnergy & environmental science
dc.rightsacceso restringido
dc.subject.ods07 Affordable and clean energy
dc.subject.ods06 Clean water and sanitation
dc.subject.ods12 Responsible consumption and production
dc.subject.odspa07 Energía asequible y no contaminante
dc.subject.odspa06 Agua limpia y saneamiento
dc.subject.odspa12 Producción y consumo responsables
dc.titleGrease trap waste valorization through hydrothermal liquefaction and anaerobic digestion: a circular approach to dairy wastewater treatment
dc.typeartículo
dc.volumen17
sipa.codpersvinculados141658
sipa.codpersvinculados1026780
sipa.codpersvinculados1065086
sipa.codpersvinculados1025235
sipa.indexWOS
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