Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Efficient solvent-less separation of lipids from municipal wet sewage scum and their sustainable conversion into biodiesel |
| Abstract | A very efficient separation of lipids from wet sewage scum was optimised and positively tested on samples taken from several wastewater treatment plants (WWTPs). By simply heating sewage scum at 353 K and centrifuging the heated mass at 4000 rpm per 1 min, a recoverability of 93-99% of total oils was always obtained. This procedure resulted to be effective on samples with very different starting water contents. In all cases, extracted lipids have a very similar composition in terms of free fatty acids (FFAs), calcium soaps (32-40%wt) and glycerides (mono-, di- and tri-glycerides were practically absents), as well as fatty acid profiles. Once separated, lipids were converted into biodiesel through a direct esterification process carried out by adopting three sequential batch reactors, in which methanol and catalysts were charged in counter current. In this way, the complete conversion (>99%) of starting FFAs into FAMEs was perfectly matched with using the minimum amount of reactants under very mild conditions (345 K, 2 h). The overall convenience of the process was completed by the anaerobic digestion of fibrous residues obtained from centrifugation of starting sewage scum: the final biogas resulted largely enough to sustain the heat of process. (C) 2015 Elsevier Ltd. All rights reserved. |
| Source | Renewable energy 90, pp. 55–61 |
| Keywords | Sewage scumBiodieselCentrifugationDirect esterificationFAMEs |
| Journal | Renewable energy |
| Editor | Pergamon,, Oxford, Regno Unito |
| Year | 2016 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.renene.2015.12.049 |
| Authors | di Bitonto, Luigi; Lopez, Antonio; Mascolo, Giuseppe; Mininni, Giuseppe; Pastore, Carlo |
| Text | 359839 2016 10.1016/j.renene.2015.12.049 ISI Web of Science WOS 000370102400006 Scopus 2 s2.0 84952684519 Sewage scum Biodiesel Centrifugation Direct esterification FAMEs Efficient solvent less separation of lipids from municipal wet sewage scum and their sustainable conversion into biodiesel di Bitonto, Luigi; Lopez, Antonio; Mascolo, Giuseppe; Mininni, Giuseppe; Pastore, Carlo CNR IRSA A very efficient separation of lipids from wet sewage scum was optimised and positively tested on samples taken from several wastewater treatment plants WWTPs . By simply heating sewage scum at 353 K and centrifuging the heated mass at 4000 rpm per 1 min, a recoverability of 93 99% of total oils was always obtained. This procedure resulted to be effective on samples with very different starting water contents. In all cases, extracted lipids have a very similar composition in terms of free fatty acids FFAs , calcium soaps 32 40%wt and glycerides mono , di and tri glycerides were practically absents , as well as fatty acid profiles. Once separated, lipids were converted into biodiesel through a direct esterification process carried out by adopting three sequential batch reactors, in which methanol and catalysts were charged in counter current. In this way, the complete conversion >99% of starting FFAs into FAMEs was perfectly matched with using the minimum amount of reactants under very mild conditions 345 K, 2 h . The overall convenience of the process was completed by the anaerobic digestion of fibrous residues obtained from centrifugation of starting sewage scum the final biogas resulted largely enough to sustain the heat of process. C 2015 Elsevier Ltd. All rights reserved. 90 Published version https //www.sciencedirect.com/science/article/abs/pii/S096014811530553X Efficient solvent less separation of lipids from municipal wet sewage scum and their sustainable conversion into biodiesel Efficient solvent less separation of lipids from municipal wet sewage scum and their sustainable conversion into biodiesel dibitonto2016RENE.pdf Articolo in rivista Pergamon, 0960 1481 Renewable energy Renewable energy Renew. energy Renewable energy. DI BITONTO LUIGI antonio.lopez LOPEZ ANTONIO giuseppe.mininni MININNI GIUSEPPE carlo.pastore PASTORE CARLO giuseppe.mascolo MASCOLO GIUSEPPE TA.P07.001.005 Recupero di risorse da rifiuti e biomasse |