Effects of pre-treatments on the lipid extraction and biodiesel production from municipal WWTP sludge
| Autor: | Magdalena Olkiewicz, Frank Stüber, Azael Fabregat, Christophe Bengoa, Agustí Fortuny, Josep Font |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Enginyeria Química, Universitat Rovira i Virgili. |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
General Chemical Engineering
Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament de l'aigua [Àrees temàtiques de la UPC] Energy Engineering and Power Technology Biodièsels WWTP municipal sludge Raw material complex mixtures Aigües residuals -- Reutilització Waste products as fuel chemistry.chemical_compound Sewage sludge fuel Llots de depuradora -- Reutilització de residus Fatty acids Biodiesel Chemistry Biodiesel fuels--Research Organic Chemistry Extraction (chemistry) food and beverages Pulp and paper industry Lipids Lipid extraction Hexane Oleic acid Fuel Technology Wastewater Yield (chemistry) Biodiesel production Lípids Pre-treatments lipids (amino acids peptides and proteins) Aigües residuals -- Plantes de tractament -- Residus -- Aprofitament Energies::Recursos energètics renovables::Biocombustibles [Àrees temàtiques de la UPC] |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Fuel Recercat. Dipósit de la Recerca de Catalunya Universitat Jaume I Repositori Institucional de la Universitat Rovira i Virgili Universitat Rovira i virgili (URV) |
| Popis: | 10.1016/j.fuel.2014.10.066 Biodiesel production is currently limited due to high raw material costs. The potential of using sludge from municipal wastewater treatment plants as an alternative lipid feedstock was investigated. Four different types of sludge (primary, secondary, blended and stabilised) were tested in lipid extraction by Soxhlet using hexane, and biodiesel production by acid catalysis. To improve the extraction efficiency, the influence of pre-treatment methods (ultrasonic and mechanical disintegration) and duration of these treatments were investigated. Finally, the effect of sludge acidification with concentrated HCl was also evaluated. The pre-treatment methods did not increase significantly the amount of extracted lipid as well as biodiesel yield. Previous sludge acidification showed lower yield of lipids from primary, secondary and blended sludge. However, the amount of saponifiable lipids was higher, giving the overall biodiesel yield almost unchanged. Among the four sludges tested, primary sludge achieved the greatest lipid and biodiesel yields, 27% and 19% respectively, on the basis of dry sludge. The highest biodiesel yields obtained from blended, secondary and stabilised sludge amounted to 15%, 4% and 2% respectively, on the basis of dry sludge. No significant influence of the pre-treatments and acidification on the fatty acid composition was found. At least 8 fatty acids were determined, with a predominance of palmitic (C16:0), stearic (C18:0) and oleic acid (C18:1). The comparison of sludge fatty acids profile with common biodiesel feedstocks showed suitability of WWTP sludge for production of biodiesel. |
| Databáze: | OpenAIRE |
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