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.
Mineo, A., Di Leto, Y., Cosenza, A., Capri, F.C., Gallo, G., Alduina, R., et al. (2024). Enhancing volatile fatty acid production from sewage sludge in batch fermentation tests. CHEMOSPHERE, 349 [10.1016/j.chemosphere.2023.140859].
Enhancing volatile fatty acid production from sewage sludge in batch fermentation tests
Mineo, AntonioPrimo
;Di Leto, Ylenia;Cosenza, Alida;Capri, Fanny Claire;Gallo, Giuseppe;Alduina, Rosa;Mannina, Giorgio
Ultimo
2024-02-01
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.
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