Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Biodiesel from dewatered wastewater sludge: a two-step process for a more advantageous production |
| Abstract | Alternative approaches for obtaining biodiesel from municipal sludge have been successfully investigated. In order to avoid the expensive conventional preliminary step of sludge drying, dewatered sludge (TSS: 15 wt%) was used as starting material. The best performance in terms of yield of fatty acid methyl esters (18 wt%) with the lowest energy demand (17 MJ kg1 FAME) was obtained by a new two-step approach based on hexane extraction carried out directly on dewatered acidified (H2SO4) sludge followed by methanolysis of extracted lipids. It was found that sulphuric acid plays a key role in the whole process not only for the transesterification of glycerides but also for the production of new free fatty acids from soaps and their esterification with methanol. In addition to biodiesel production, the investigated process allows valorization of primary sludge as it turns it into a valuable source of chemicals, namely sterols (2.5 wt%), aliphatic alcohols (0.8 wt%) and waxes (2.3 wt%). |
| Source | Chemosphere 92 (6), pp. 667–673 |
| Keywords | BiodieselBiorefineryFAMEsWaste valorizationWastewater sludge |
| Journal | Chemosphere |
| Editor | Elsevier, Oxford, Regno Unito |
| Year | 2013 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.chemosphere.2013.03.046 |
| Authors | Pastore C., Lopez A., Lotito V., Mascolo G. |
| Text | 241722 2013 10.1016/j.chemosphere.2013.03.046 Biodiesel Biorefinery FAMEs Waste valorization Wastewater sludge Biodiesel from dewatered wastewater sludge a two step process for a more advantageous production Pastore C., Lopez A., Lotito V., Mascolo G. CNR IRSA, via De Blasio 5, 70132 Bari, Italy Alternative approaches for obtaining biodiesel from municipal sludge have been successfully investigated. In order to avoid the expensive conventional preliminary step of sludge drying, dewatered sludge TSS 15 wt% was used as starting material. The best performance in terms of yield of fatty acid methyl esters 18 wt% with the lowest energy demand 17 MJ kg1 FAME was obtained by a new two step approach based on hexane extraction carried out directly on dewatered acidified H2SO4 sludge followed by methanolysis of extracted lipids. It was found that sulphuric acid plays a key role in the whole process not only for the transesterification of glycerides but also for the production of new free fatty acids from soaps and their esterification with methanol. In addition to biodiesel production, the investigated process allows valorization of primary sludge as it turns it into a valuable source of chemicals, namely sterols 2.5 wt% , aliphatic alcohols 0.8 wt% and waxes 2.3 wt% . 92 Articolo in rivista Elsevier 0045 6535 Chemosphere Chemosphere Chemosphere Chemosphere. Chemosphere. Environmental chemistry, Chemosphere. Persistent organic pollutants and dioxins, Chemosphere. Environmental toxicology and risk assessment, Chemosphere. Science for Environmental toxicology, vincenzo.lotito LOTITO VINCENZO antonio.lopez LOPEZ ANTONIO carlo.pastore PASTORE CARLO giuseppe.mascolo MASCOLO GIUSEPPE TA.P07.001.005 Recupero di risorse da rifiuti e biomasse |