| Title | Energy Recovery from Municipal Sewage Sludge: An Environmentally Friendly Source for the Production of Biochemicals |
|---|---|
| ID_Doc | 6732 |
| Authors | di Bitonto, L; Angelini, A; Pastore, C |
| Title | Energy Recovery from Municipal Sewage Sludge: An Environmentally Friendly Source for the Production of Biochemicals |
| Year | 2024 |
| Published | Applied Sciences-Basel, 14, 12 |
| Abstract | Featured Application: Development of novel and green technologies to produce biochemicals, especially biodiesel and biolubricants from municipal sewage sludge. In this work, a detailed analysis of the lipid component in primary sludge and sewage scum up-taken from several wastewater treatment plants located in southern Italy was carried out. Lipids in the primary sludge accounted for 200-250 mg/g of the total solids (TS), with calcium soaps as a main component (70-82%), while total lipids made up about 350-500 mg/gTS in the sewage scum and consisted mainly of FFAs (45-60%) and calcium soaps (27-35%). In addition, estolides and 10-hydroxystearic acid were also quantified. A specific valorization process was then developed and tested for either primary sludge or sewage scum. In detail, lipids were first recovered, chemically activated by the addition of acids (calcium soaps were converted to free fatty acids) and finally reacted with methanol to obtain methyl esters. The lipid recovery from primary sludge and sewage scum was particularly efficient (recoverability of 92-99%). The conversion of the starting acids into FAMEs (yield > 98%) was achieved under very mild conditions (70 degrees C, 2 h) with AlCl3 |
| https://www.mdpi.com/2076-3417/14/12/4974/pdf?version=1717754076 |
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