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Hydrodynamic cavitation applied to anaerobic degradation of fats, oils and greases (FOGs)
Linköping University, Department of Physics, Chemistry and Biology, Biotechnology.
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

To increase profitability for biogas production, new innovative substrates and condition of operations needs to be implemented. At the current state, fats, oils and greases (FOGs) represent a promising substrate even though it brings operational challenges to the anaerobic digestion process. By utilizing hydrodynamic cavitation (HC) as a pre-treatment of the FOGs, the efficiency of FOGs’ co-digestion with wastewater sludge can be significantly improved. Preliminary experiments conducted on oil and water demonstrates that the HC pre-treatment improves the oil solubilisation as well as forms stable oil and water emulsion that last for several hours. The pre-treatment also improved the soluble chemical oxygen demand (COD) of biosludge (BiSl) by up to 115% and the initial degradation rate by up to 35%. In a semi-continues system, this allowed a significant increment in the specific methane yield depending on the organic loading rate (OLR) applied[1]. With sufficient process optimization, the HC-pre-treatment may prove to be an energy efficient and effective pre-treatment of FOGs.

[1] Information restricted by confidentiality agreement.

Place, publisher, year, edition, pages
2016. , p. 53
Keywords [en]
FOGs, Hydrodynamic cavitation, Anaerobic digestion, Pre-treatment, Oil emulsion
National Category
Industrial Biotechnology
Identifiers
URN: urn:nbn:se:liu:diva-140179OAI: oai:DiVA.org:liu-140179DiVA, id: diva2:1137957
Subject / course
Biotechnology
Presentation
2016-12-16, Linköping University, Linköping, 10:30 (English)
Supervisors
Examiners
Available from: 2018-04-26 Created: 2017-09-03 Last updated: 2018-04-26Bibliographically approved

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