6533b861fe1ef96bd12c57f6
RESEARCH PRODUCT
Sewage sludge acidogenic fermentation for organic resource recovery towards carbon neutrality: an experimental survey testing the headspace influence
Antonio MineoAlida CosenzaGiorgio Manninasubject
Environmental EngineeringSewageSettore ICAR/03 - Ingegneria Sanitaria-AmbientaleRenewable Energy Sustainability and the EnvironmentBioengineeringGeneral MedicineHydrogen-Ion ConcentrationFatty Acids VolatileCarbonBioreactorsFermentationAnaerobic digestion Headspace effects Resource recovery from wastewater Sewage sludge Volatile fatty acidsWaste Management and DisposalAcidsdescription
Volatile fatty acids (VFAs) produced by acidogenic digestion of sewage sludge are very interesting bio-products which can contribute to carbon neutrality of wastewater treatment plants. Studies on the production of VFAs from sewage sludge from fermenters with membrane are limited. In view of above, VFAs from a fermenter pilot plant equipped with a membrane bioreactor and fed with real sewage sludge has been monitored. The effect of headspace volume (HdV) on VFA production was studied for the first time to elucidate the optimal operation conditions. Specifically, three fermenter HdV values (namely, 20, 40 and 60% of the total volume) have been investigated. Results revealed that the HdV of 20% ensured the highest sCOD production (900 mgCOD/L) and VFA/COD ratio (45.4%). High value of HdV (namely, 40 and 60%) strongly decreased the acidogenic fermentation performance in terms of VFA production.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2022-08-31 |