TY - JOUR
T1 - Biogas production from winery wastewater
T2 - Effect of the substrate-inoculum ratio on fly ash addition and iron availability
AU - Lauzurique, Yeney
AU - Fermoso, Fernando G.
AU - Sánchez, Nicolás
AU - Castillo, Alejandra
AU - Salazar, Ricardo
AU - García, Verónica
AU - Huiliñir, César
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/6
Y1 - 2022/6
N2 - The effect of substrate-inoculum ratio and fly ash (FA) concentration on the anaerobic digestion of winery wastewater was studied. Two substrate-inoculum ratios (0.50 and 1 g soluble COD/g VSS) and five fly ash concentrations (25, 50, 75, 100 and 150 mg/L) were tested under mesophilic conditions. The results showed that 0.50 g soluble COD/g VSS was the best substrate-inoculum ratio. Regarding the FA, 100 mg/L improved the specific methane production by 79% compared to the control assay. In comparison, 150 mg/L produced an inhibition of methane production, with a 55% decrease in specific methane production with respect to the control assay. According to the bioavailability study, FA had a similar effect to a system with Fe-EDTA on anaerobic digestion, which could indicate that the Fe present in FA was present in the solution and bioavailable to microorganisms. Therefore, a possible mechanism for the action of FA on anaerobic digestion was proposed. Finally, the kinetic analysis showed that FA improved the maximum specific methane production rate and decreased the lag phase.
AB - The effect of substrate-inoculum ratio and fly ash (FA) concentration on the anaerobic digestion of winery wastewater was studied. Two substrate-inoculum ratios (0.50 and 1 g soluble COD/g VSS) and five fly ash concentrations (25, 50, 75, 100 and 150 mg/L) were tested under mesophilic conditions. The results showed that 0.50 g soluble COD/g VSS was the best substrate-inoculum ratio. Regarding the FA, 100 mg/L improved the specific methane production by 79% compared to the control assay. In comparison, 150 mg/L produced an inhibition of methane production, with a 55% decrease in specific methane production with respect to the control assay. According to the bioavailability study, FA had a similar effect to a system with Fe-EDTA on anaerobic digestion, which could indicate that the Fe present in FA was present in the solution and bioavailable to microorganisms. Therefore, a possible mechanism for the action of FA on anaerobic digestion was proposed. Finally, the kinetic analysis showed that FA improved the maximum specific methane production rate and decreased the lag phase.
KW - Bioavailability
KW - Fly ash
KW - Modified Gompertz model
KW - Specific methane production
KW - Substrate-inoculum ratio
UR - http://www.scopus.com/inward/record.url?scp=85129704291&partnerID=8YFLogxK
U2 - 10.1016/j.jwpe.2022.102826
DO - 10.1016/j.jwpe.2022.102826
M3 - Article
AN - SCOPUS:85129704291
SN - 2214-7144
VL - 47
JO - Journal of Water Process Engineering
JF - Journal of Water Process Engineering
M1 - 102826
ER -