TY - JOUR
T1 - Microbial electrochemical fluidized bed reactor (ME-FBR)
T2 - An energy-efficient advanced solution for treating real brewery wastewater with different initial organic loading rates.
AU - Asensio, Y.
AU - Llorente, M.
AU - Tejedor-Sanz, S.
AU - Fernández-Labrador, P.
AU - Manchon, C.
AU - Ortiz, J. M.
AU - Ciriza, J. F.
AU - Monsalvo, V.
AU - Rogalla, F.
AU - Esteve-Núñez, A.
N1 - Funding Information:
This research was supported by the European Commission through the project ANSWER (Advanced Nutrient Solutions With Electrochemical Recovery, LIFE program, LIFE15 ENV/ES/00059 ).
Publisher Copyright:
© 2021 The Authors
PY - 2021/12
Y1 - 2021/12
N2 - Electroactive bacteria are able to evolve strategies to transfer electrons with electroconductive materials. The boundaries of using electroactive bacteria to scale up wastewater treatments indicate the necessity to evaluate some of the most critical design and operational aspects. In this context, we have explored a concept so-called microbial electrochemical fluidized bed reactor (ME-FBR) for optimizing treatment of brewery wastewater by evaluating the anode potential, from + 200 mV to + 800 mV (vs. Ag/AgCl, 3 M reference electrode), in a vast range of Organic Loading Rate (OLR;0.23 kg COD/m3 d−1 to 23.60 kg COD/m3 d−1). Furthermore, the impact of the cathode nature (stainless steel mesh and sponge) and the electroconductive bed volume was evaluated regarding the wastewater treatment capacity. This manuscript reveals a positive impact on the ME-FBR capacity for treating wastewater: COD removal (87%) and nutrient removal (66% of TN and 75% of TP). Finally, the treatment energy consumption was always under 0.4 kWh Kg CODremoved−1 which was 10-fold lower than the required energy for aerating bioreactors from conventional activated sludge or membrane reactors.
AB - Electroactive bacteria are able to evolve strategies to transfer electrons with electroconductive materials. The boundaries of using electroactive bacteria to scale up wastewater treatments indicate the necessity to evaluate some of the most critical design and operational aspects. In this context, we have explored a concept so-called microbial electrochemical fluidized bed reactor (ME-FBR) for optimizing treatment of brewery wastewater by evaluating the anode potential, from + 200 mV to + 800 mV (vs. Ag/AgCl, 3 M reference electrode), in a vast range of Organic Loading Rate (OLR;0.23 kg COD/m3 d−1 to 23.60 kg COD/m3 d−1). Furthermore, the impact of the cathode nature (stainless steel mesh and sponge) and the electroconductive bed volume was evaluated regarding the wastewater treatment capacity. This manuscript reveals a positive impact on the ME-FBR capacity for treating wastewater: COD removal (87%) and nutrient removal (66% of TN and 75% of TP). Finally, the treatment energy consumption was always under 0.4 kWh Kg CODremoved−1 which was 10-fold lower than the required energy for aerating bioreactors from conventional activated sludge or membrane reactors.
KW - Electroactive bacteria
KW - Electrode nature
KW - Fluidized bed
KW - Microbial electrochemical technologies
KW - Wastewater treatment
UR - http://www.scopus.com/inward/record.url?scp=85117916667&partnerID=8YFLogxK
U2 - 10.1016/j.jece.2021.106619
DO - 10.1016/j.jece.2021.106619
M3 - Article
AN - SCOPUS:85117916667
SN - 2213-3437
VL - 9
JO - Journal of Environmental Chemical Engineering
JF - Journal of Environmental Chemical Engineering
IS - 6
M1 - 106619
ER -
