Sulfate reduction in a sludge gradually acclimated to acetate as the sole electron donor and its potential application as inoculum in a microbial fuel cell

The aim of the present work(Biodegradationwas to obtainmodelinga sulfidogenicof sludge bioreactorssludge capableof totalofpetroleumthriving withhydrocarbonsacetate andweatheringevaluatein itssoilpotential application as a source ofandmicroorganismssediments) in a microbial fuel cell (MFC). The results showed that sulfate (SO⁻² ) to sulfide 4 (HS⁻ ) conversion increased from 74 ± 0.39% with a fed consisting of a mixture acetate:butyrate, to 85 ± 0.34% with a fed S.A. Medina-Moreno, S. Huerta-Ochoa, C.A. Lucho-Constantino, L. Aguilera-Vázquez, A. Jiménez-containing only acetate. The sulfate removal rate (SRR) was of 1755.30 ± 50 mg SO⁻² gVSS 4⁻¹ L⁻¹ d⁻¹ and sulfate reducing activity (SRA) 155.21 ± 30 González mg COD-H y M. Gutiérrez-Rojas₂ S gVSS⁻¹ d⁻¹ with the mixture and SRR 1692.31 ± 39 mg SO⁻² gVSS 4⁻¹ L⁻¹ d⁻¹; SRA 184.25 ± 24 mg259COD-HCrecimiento, sobrevivencia y adaptación de Bifidobacterium infantis a condiciones ácidas₂ S gVSS⁻¹ d⁻¹ with acetate. The COD removal increased from 66 ± 0.8% with the mixture to 81 ± 0.39%, with acetate. The open circuit voltage increased from 0.668 to 0.788 V with acetate. The results suggested that this (Growth, survival and adaptation of Bifidobacterium infantis to acidic conditions) sludge could be utilized to recover energy that could be eventually susceptible to storage for further utilization while reducing sulfate and avoiding accumulationL. Mayorga-Reyes,of acetate.P. Bustamante-Camilo, A. Gutiérrez-Nava, E. Barranco-Florido y A. Azaola-.