Enhancing volatile fatty acid production from sewage sludge in batch fermentation tests
- Authors: Mineo, Antonio; Di Leto, Ylenia; Cosenza, Alida; Capri, Fanny Claire; Gallo, Giuseppe; Alduina, Rosa; Ni, Bing-Jie; Mannina, Giorgio
- Publication year: 2024
- Type: Articolo in rivista
- OA Link: http://hdl.handle.net/10447/619379
Abstract
Volatile fatty acids (VFA) from sewage sludge represent an excellent recovered resource from wastewater treatment. This study investigated four sludge pre-treatments (namely, potassium permanganate - KMnO4, initial pH = 10, initial pH = 2.5 and low-temperature thermal hydrolysis) by operating batch reactors under acidogenic fermentation conditions. Results revealed that 0.1 g KMnO4/g of total suspended solids represents the best pre-treatment obtaining up to 2713 mgCOD L-1 and 452 mgCOD/g of volatile suspended solids. These results also paralleled metataxonomic analysis highlighting changes in prokaryotic microbial structures of sewage sludge of the batch fermentations subjected to the different pre-treatments.