Energy potential of household fats, oils and grease waste

In comparison to fats, oils and grease (FOG) found in commercial and industrial effluents, very little is known about FOG discharged at household level. To address this shortcoming, household FOG production was calculated following a year‐long monthly collection at 2.3 kg/year per household, equival...

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Published in:Water and environment journal : WEJ 2022-02, Vol.36 (1), p.132-141
Main Authors: Collin, Thomas, Cunningham, Rachel, Deb, Melani, Villa, Raffaella, MacAdam, Jitka, Jefferson, Bruce
Format: Article
Language:English
Subjects:
Anaerobic digestion
Anaerobic treatment
biodiesel
Biodiesel fuels
Biofuels
Biogas
Diesel
Digestion
Effluents
Energy recovery
fatberg
Fats
food waste
Grease
Households
Industrial effluents
Industrial wastes
Industrial wastewater
Oils & fats
Sewage
Sewage sludge
sewer deposits
Sludge
Substrates
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Summary:In comparison to fats, oils and grease (FOG) found in commercial and industrial effluents, very little is known about FOG discharged at household level. To address this shortcoming, household FOG production was calculated following a year‐long monthly collection at 2.3 kg/year per household, equivalent to 0.8 kg/year per capita. In the United Kingdom, these numbers translate in an annual estimated FOG production of 62 380 tonnes. Physico‐chemical characterization of household FOG showed promising results for biodiesel production. Biomethane yield was measured at 875 mL CH4/g VSadded, twice as much that of sewage sludge, making it a desirable substrate for anaerobic digestion. It was thus estimated that energy recovery from household FOG through anaerobic co‐digestion or biodiesel production could generate about 490 GWh/year in the United Kingdom. However, insights from participants revealed that most of this waste is currently not recovered, requiring the development of schemes fitting with households' routine to maximize collection rates.
ISSN:1747-6585
1747-6593
DOI:10.1111/wej.12744